2018 * XXIX * 1
SISU
TEADUSARTIKLID
Malle Järvan
SÕNNIKU MÕJUST MAHEVILJELUSLIKULT MAJANDATAVAS KÜLVIKORRAS
1–11
THE IMPACT OF MANURE APPLICATION IN THE ORGANICALLY MANAGED CROP ROTATION
Malle Järvan
Estonian Crop Research Institute, Department of Agrotechnology, Teaduse 4/6, 75501 Saku, Estonia
Organic agriculture is a production system which relies on ecological processes. In the organic farming systems, it is important to improve soil fertility and to protect soil physical condition for its healthy functioning. The benefit from organically cultivated crops is strongly related to the maintenance of soil fertility based to a great extent on the soil organic matter content. Farmyard manure is one of the more valuable organic fertilizers maintaining soil fertility in the systems of alternative agriculture. To investigate the influence of manure from several aspects, a field experiment was carried out on a sandy loam Luvisol. A five-year crop rotation (potato (Solanum tuberosum L.) → oat (Avena sativa L.) → spring barley (Hordeum vulgare L.) → red clover (Trifolium pretense L.)→ winter rye (Secale cereale L.) was organically managed without manure (Org I) and with manure (Org II) treatments. 8.3 t ha-1 of organic dry matter as straw-based cattle farmyard manure was ploughed into the soil for potato grown the next year. During a seven-year experimental period, no significant (p < 0.05) changes were found in the soil organic carbon content. For the Org I treatment, a significant decrease in potassium, copper and boron contents in the soil occurred. The application of manure counterbalanced the need for potassium, and significantly increased the contents of phosphorus and magnesium in the soil. Manure stimulated microbial life in the soil: the communities of cellulose-decomposing bacteria, nitrifying bacteria and total bacteria increased significantly. Under the influence of manure, the yields of potato, oat and barley increased by 52, 23 and 10%, respectively; this allowed us to gain an extra 30 GJ metabolizable energy during the crop rotation. In organic farming systems, the regular application of solid farmyard manure is recommendable for the maintaining and improving the status of available nutrients and microbial activities in the soil, and for the economic profitability.
Keywords: cattle farmyard manure, crop yields, organic carbon, plant nutrients, soil bacteria.
Source: Agraarteadus, 2018,29(1)1–11
doi: https://dx.doi.org/10.15159/jas.18.1
Malle Järvan
Estonian Crop Research Institute, Department of Agrotechnology, Teaduse 4/6, 75501 Saku, Estonia
Organic agriculture is a production system which relies on ecological processes. In the organic farming systems, it is important to improve soil fertility and to protect soil physical condition for its healthy functioning. The benefit from organically cultivated crops is strongly related to the maintenance of soil fertility based to a great extent on the soil organic matter content. Farmyard manure is one of the more valuable organic fertilizers maintaining soil fertility in the systems of alternative agriculture. To investigate the influence of manure from several aspects, a field experiment was carried out on a sandy loam Luvisol. A five-year crop rotation (potato (Solanum tuberosum L.) → oat (Avena sativa L.) → spring barley (Hordeum vulgare L.) → red clover (Trifolium pretense L.)→ winter rye (Secale cereale L.) was organically managed without manure (Org I) and with manure (Org II) treatments. 8.3 t ha-1 of organic dry matter as straw-based cattle farmyard manure was ploughed into the soil for potato grown the next year. During a seven-year experimental period, no significant (p < 0.05) changes were found in the soil organic carbon content. For the Org I treatment, a significant decrease in potassium, copper and boron contents in the soil occurred. The application of manure counterbalanced the need for potassium, and significantly increased the contents of phosphorus and magnesium in the soil. Manure stimulated microbial life in the soil: the communities of cellulose-decomposing bacteria, nitrifying bacteria and total bacteria increased significantly. Under the influence of manure, the yields of potato, oat and barley increased by 52, 23 and 10%, respectively; this allowed us to gain an extra 30 GJ metabolizable energy during the crop rotation. In organic farming systems, the regular application of solid farmyard manure is recommendable for the maintaining and improving the status of available nutrients and microbial activities in the soil, and for the economic profitability.
Keywords: cattle farmyard manure, crop yields, organic carbon, plant nutrients, soil bacteria.
Source: Agraarteadus, 2018,29(1)1–11
doi: https://dx.doi.org/10.15159/jas.18.1
Oluline:
- Maheviljelus ilma taimetoitaineid juurde andmata põhjustas mullas omastatava kaaliumi sisalduse olulise languse.
- Sõnniku kasutamine suutis mulla kaaliumibilansi tasakaalustada ning ühtlasi suurendas ka omastatava fosfori ja magneesiumi sisaldust mullas.
- Sõnnikuga väetamine aktiveeris mullamikroobide tegevust.
- Põhu allapanuga veisesõnniku kasutamine maheviljeluslikult majandatavas külvikorras oli kasulik nii ökoloogilisest kui ka majanduslikust vaatekohast lähtudes: oli tagatud mullaviljakuse püsimine (teatud näitajate osas ka paranemine), aktiveerus mullamikroobide tegevus, saakide suurenemine tagas maheviljeluse tulukuse suurenemise.
Raimo Kõlli1, Tõnu Tõnutare1, Laura Eiber2
ÜLEVAADE: EESTI MULLASTIKU SEISUNDI UURIMUSED, MULLASEIRE SUUNAD JA VÕIMALUSED SEIRE TÕHUSTAMISEKS
12–24
REVIEW: RESEARCHES ON THE STATUS OF ESTONIAN SOILS, DIRECTIONS OF SOIL MONITORING AND THE POSSIBILITIES FOR INTENSIFICATION OF MONITORING
Raimo Kõlli1, Tõnu Tõnutare1, Laura Eiber2
1Estonian University of Life Sciences, Institute of Agricultural and Environmental Sciences, Chair of Soil Science, Fr. R. Kreutzwaldi Str. 5, 51006 Tartu
2Estonian Environmental Agency, Environmental Analysis Department, Mustamäe Rd. 33, 10616 Tallinn
In the introductory part a short retrospect to the soil survey proceeded in Estonia since fifties of previous century is given. As a result of this survey the large scale (1:10,000) digitized soil map for the whole Estonian territory with soil contours (soil mapping units) related soil species databases was compiled. For valuable legacy data of this survey, which was conducted by the state financed institution Estonian Agri-project, are soil varieties models (totally 50 models of arable and 27 models of forest soils) with statistically elaborated soils' morphometric and physical-chemical properties in relation to all presented in soil profile (in pedon) diagnostic horizons. The main deliberation of the work is connected with methodology of soil monitoring and with the problem – how to integrate the received from soil monitoring data with capacious databases received during soil survey and scientific researches. In the study the following topics are discussed in connection with soil monitoring: methodological problems, used laboratory analyses, possibilities for intensification of soil monitoring and discovered shortcomings in fulfilling of monitoring programme. The most developed direction of Estonian soil monitoring is the monitoring of soils' pollution (contamination) and degradation. Starting from the need of revision and improvement of state soil monitoring programme it is recommended to start monitoring (1) of the processes proceeded in the humus covers (pro humus forms) of natural soils and (2) of the soil type-specific biological diversity of key (or model) soils. It is emphasised the urgent need of realizing such essential tasks as (1) to arrange the integration of newly received monitoring results into the existing soil databases, (2) to do the critical review of published works on soil monitoring with compiling their systematic reference list, and (3) to compile the registers about soil monitoring areas location and about key soil species.
Keywords: soil species and variety, humus cover type, transect method, soil monitoring, soil mapping unit.
Source: Agraarteadus, 2018, 29(1):12–24
doi: https://dx.doi.org/10.15159/jas.18.06
Raimo Kõlli1, Tõnu Tõnutare1, Laura Eiber2
1Estonian University of Life Sciences, Institute of Agricultural and Environmental Sciences, Chair of Soil Science, Fr. R. Kreutzwaldi Str. 5, 51006 Tartu
2Estonian Environmental Agency, Environmental Analysis Department, Mustamäe Rd. 33, 10616 Tallinn
In the introductory part a short retrospect to the soil survey proceeded in Estonia since fifties of previous century is given. As a result of this survey the large scale (1:10,000) digitized soil map for the whole Estonian territory with soil contours (soil mapping units) related soil species databases was compiled. For valuable legacy data of this survey, which was conducted by the state financed institution Estonian Agri-project, are soil varieties models (totally 50 models of arable and 27 models of forest soils) with statistically elaborated soils' morphometric and physical-chemical properties in relation to all presented in soil profile (in pedon) diagnostic horizons. The main deliberation of the work is connected with methodology of soil monitoring and with the problem – how to integrate the received from soil monitoring data with capacious databases received during soil survey and scientific researches. In the study the following topics are discussed in connection with soil monitoring: methodological problems, used laboratory analyses, possibilities for intensification of soil monitoring and discovered shortcomings in fulfilling of monitoring programme. The most developed direction of Estonian soil monitoring is the monitoring of soils' pollution (contamination) and degradation. Starting from the need of revision and improvement of state soil monitoring programme it is recommended to start monitoring (1) of the processes proceeded in the humus covers (pro humus forms) of natural soils and (2) of the soil type-specific biological diversity of key (or model) soils. It is emphasised the urgent need of realizing such essential tasks as (1) to arrange the integration of newly received monitoring results into the existing soil databases, (2) to do the critical review of published works on soil monitoring with compiling their systematic reference list, and (3) to compile the registers about soil monitoring areas location and about key soil species.
Keywords: soil species and variety, humus cover type, transect method, soil monitoring, soil mapping unit.
Source: Agraarteadus, 2018, 29(1):12–24
doi: https://dx.doi.org/10.15159/jas.18.06
Oluline:
- Vajalikuks aluseks ökoloogiliselt õige maakasutuse korraldamisel ja keskkonna hea seisundi tagamisel Eestis on digitaalne 1:10000 mullastiku kaart.
- Eesti kohta on koostatud 50 põllu- ja 27 metsamulla erimi mudelprofiili koos kõigi horisontide füüsikaliste ja keemiliste omaduste andmetega, mis väärivad senisest enamat kasutamist praktikas.
- Hea ülevaate saamiseks Eesti muldade seirest vajaksime seda käsitlevate publikatsioonide bibliograafilist nimestikku koos oskussõnade süstematiseeritud loendiga.
- Vajame (1) seiratud mullaliikide taksonoomilist registrit maakasutusviiside kaupa, mis sisaldab varemalt laekunud andmestikud ja kuhu saab integreerida jooksvalt kogutud seireandmed, ja (2) kohtpaikselt fikseeritud seirepunktide ja -alade registrit, mida saab seostada olemasoleva keskkonnaseire võrgustikuga, et integreerida mullastiku andmed teiste seiratavate looduse komponentide andmebaasidega.
- Metsamuldade ökoloogilisest talitlemisest parema arusaamise huvides tuleks algust teha nende huumuskatte, kui väga hea ökoloogilise indikaatori, süstemaatilise seirega.
- Mullaelustiku seire peaks toimuma muld-keskselt so. seostades seireandmed mulla taksoni, huumuskatte tüübi ja tema eriilmeliste kihtide ja/või mulla agregaatidega.
- Mullaseirena saab võtta vaid neid muldade uurimusi ja seisundi hindamisi, milliste puhul muld on määratletud taksonoomilisest aspektist ja kirjeldatud heale tavale vastavalt..
Margit Olle
THE EFFECT OF VERMICOMPOST ON THE GROWTH AND QUALITY OF CRESS (LEPIDIUM SATIVUM)
25–28
THE EFFECT OF VERMICOMPOST ON THE GROWTH AND QUALITY OF CRESS (LEPIDIUM SATIVUM)
Margit Olle
Estonian Crop Research Institute, J. Aamissepa 1, 48309 Jõgeva, Estonia
Vermicompost is the excreta of earthworm, which are capable of improving soil health and nutrient status. Vermiculture is a process by which all types of biodegradable wastes such as farm wastes, kitchen wastes, market wastes, bio-wastes of agro based industries, livestock wastes etc. are converted while passing through the worm-gut to nutrient rich vermicompost. The aim was to find suitable substrate to grow cress. 1. 30% vermicompost, peat, sand and dolomite stone. 2. 25% vermicompost, peat, gravel, perlite. 3. 25% vermicompost, peat, gravel, light gravel. 4. Growth substrate bought from a shop in Estonia (seller didn't allow to usage the name of the brand). 5. 20% vermicompost and organic matter rich claysoil. Results: Most elongated cress plants were in treatment 4, and the shortest ones in treatment 5. At the same time the longest roots were measured from plants in treatment 2, but shortest in treatment 5. The thickest stem was measured by treatment 1 and the thinnest stem was by treatment 5. The chemical analyses are showing that the smallest content of nitrogen was by treatment 3 and the highest by treatment 4. The smallest content of phosphorus was by treatment 5 and the highest by treatment 4. The smallest content of potassium was by treatment 4 and the highest by treatment 5. The smallest content of calcium was by treatment 4 and the highest by treatment 3. The smallest content of magnesium was by treatment 4 and the highest by treatment 5. Conclusion: out of the results of this experiment we could conclude that the best substrate to grow cress is substrate number 3: 25% vermicompost, peat, gravel, light gravel.
Keywords: cress, growth, vermicompost, quality.
Source: Agraarteadus, 2018, 29(1):25–28
doi: https://dx.doi.org/10.15159/jas.18.02
Margit Olle
Estonian Crop Research Institute, J. Aamissepa 1, 48309 Jõgeva, Estonia
Vermicompost is the excreta of earthworm, which are capable of improving soil health and nutrient status. Vermiculture is a process by which all types of biodegradable wastes such as farm wastes, kitchen wastes, market wastes, bio-wastes of agro based industries, livestock wastes etc. are converted while passing through the worm-gut to nutrient rich vermicompost. The aim was to find suitable substrate to grow cress. 1. 30% vermicompost, peat, sand and dolomite stone. 2. 25% vermicompost, peat, gravel, perlite. 3. 25% vermicompost, peat, gravel, light gravel. 4. Growth substrate bought from a shop in Estonia (seller didn't allow to usage the name of the brand). 5. 20% vermicompost and organic matter rich claysoil. Results: Most elongated cress plants were in treatment 4, and the shortest ones in treatment 5. At the same time the longest roots were measured from plants in treatment 2, but shortest in treatment 5. The thickest stem was measured by treatment 1 and the thinnest stem was by treatment 5. The chemical analyses are showing that the smallest content of nitrogen was by treatment 3 and the highest by treatment 4. The smallest content of phosphorus was by treatment 5 and the highest by treatment 4. The smallest content of potassium was by treatment 4 and the highest by treatment 5. The smallest content of calcium was by treatment 4 and the highest by treatment 3. The smallest content of magnesium was by treatment 4 and the highest by treatment 5. Conclusion: out of the results of this experiment we could conclude that the best substrate to grow cress is substrate number 3: 25% vermicompost, peat, gravel, light gravel.
Keywords: cress, growth, vermicompost, quality.
Source: Agraarteadus, 2018, 29(1):25–28
doi: https://dx.doi.org/10.15159/jas.18.02
Highlights:
- Cress growth parameters are showing that best growth substrates to grow this plant are treatments 1 (30% vermicompost, peat, sand and dolomite stone) and 2 (25% vermicompost, peat, gravel, perlite).
- The nutrient content of cress plants shows that best suitable growth substrate is treatment 3 (25% vermicompost, peat, gravel, light gravel).
- It can be summarized that for cress the best growth substrate, regarding growth parameters and nutrient content, is treatment 3 (25% vermicompost, peat, gravel, light gravel).
Ayomide Omolara Olofinko1, Henry Adefisayo Adewole2, Victor Folorunso Olaleye2
COMPARATIVE ASSESSMENT OF SELECTED HEAVY METAL LOAD IN THREE TILAPIINE SPECIES INHABITING OSINMO RESERVOIR, SOUTHWESTERN NIGERIA
29–40
COMPARATIVE ASSESSMENT OF SELECTED HEAVY METAL LOAD IN THREE TILAPIINE SPECIES INHABITING OSINMO RESERVOIR, SOUTHWESTERN NIGERIA
Ayomide Omolara Olofinko1, Henry Adefisayo Adewole2, Victor Folorunso Olaleye2
1Institute of Ecology and Environmental Studies, Obafemi Awolowo University, Ile-Ife, Nigeria
2Department of Zoology, Obafemi Awolowo University, Ile-Ife, Nigeria
The levels of selected heavy metal in the water and fillets of Tilapia zillii Gervais, Sarotherodon galilaeus Trewavas and Oreochromis niloticus Lineaus in Osinmo Reservoir were assessed and compared with established regulatory limits of WHO and FEPA with a view to providing information on the water and the fish fillet heavy metal load as well as the fillet bio-accumulative potential as a likely indicator for human fish consumption safety. Water samples and fish specimens were collected monthly from Osinmo Reservoir, Ejigbo, Southwestern, Nigeria for a period of 6 months. The descaled-dried fish fillet and water samples were digested and analysed for lead, chromium, iron, zinc and cadmium using Atomic Absorption Spectrophotometer (A.A.S.). The data obtained were subjected to descriptive and inferential statistics using SPSS 21. The results showed that zinc concentration which was the highest in the water samples and ranged between 144 µg l-1 and 288 µg l-1 was also the highest in the fillets of all the cichlid species. However, the concentrations were within the mandatory regulatory limits. The result of the study also revealed significant differences (P < 0.05) in heavy metal loads of the fish fillets between the cichlid fish species from Osinmo Reservoir. Irrespective of the month of sampling, the heavy metal levels in fish fillets samples were found to increase in the order: O. niloticus > T. zillii > S. galilaeus. However, the levels of lead (11.00–26.00 µg l-1 and 15.00–31.00 µgL-1) and cadmium (6.33–13.00 µg l-1 and 2.33–12.33 µg l-1) which was the least in both water and fish fillet respectively, were above the recommended regulatory acceptable limit of WHO and FEPA. The study concluded that the elevated levels of lead and cadmium in the water and the fish fillet samples assayed indicated that the two elements negatively impacted the fish fillet quality, thereby raising human health consumption safety issues.
Keywords: heavy metal, tilapiine, Osinmo reservoir, fillet, health, safety, consumption.
Source: Agraarteadus, 2018, 29(1):29–40
doi: https://dx.doi.org/10.15159/jas.18.05
Ayomide Omolara Olofinko1, Henry Adefisayo Adewole2, Victor Folorunso Olaleye2
1Institute of Ecology and Environmental Studies, Obafemi Awolowo University, Ile-Ife, Nigeria
2Department of Zoology, Obafemi Awolowo University, Ile-Ife, Nigeria
The levels of selected heavy metal in the water and fillets of Tilapia zillii Gervais, Sarotherodon galilaeus Trewavas and Oreochromis niloticus Lineaus in Osinmo Reservoir were assessed and compared with established regulatory limits of WHO and FEPA with a view to providing information on the water and the fish fillet heavy metal load as well as the fillet bio-accumulative potential as a likely indicator for human fish consumption safety. Water samples and fish specimens were collected monthly from Osinmo Reservoir, Ejigbo, Southwestern, Nigeria for a period of 6 months. The descaled-dried fish fillet and water samples were digested and analysed for lead, chromium, iron, zinc and cadmium using Atomic Absorption Spectrophotometer (A.A.S.). The data obtained were subjected to descriptive and inferential statistics using SPSS 21. The results showed that zinc concentration which was the highest in the water samples and ranged between 144 µg l-1 and 288 µg l-1 was also the highest in the fillets of all the cichlid species. However, the concentrations were within the mandatory regulatory limits. The result of the study also revealed significant differences (P < 0.05) in heavy metal loads of the fish fillets between the cichlid fish species from Osinmo Reservoir. Irrespective of the month of sampling, the heavy metal levels in fish fillets samples were found to increase in the order: O. niloticus > T. zillii > S. galilaeus. However, the levels of lead (11.00–26.00 µg l-1 and 15.00–31.00 µgL-1) and cadmium (6.33–13.00 µg l-1 and 2.33–12.33 µg l-1) which was the least in both water and fish fillet respectively, were above the recommended regulatory acceptable limit of WHO and FEPA. The study concluded that the elevated levels of lead and cadmium in the water and the fish fillet samples assayed indicated that the two elements negatively impacted the fish fillet quality, thereby raising human health consumption safety issues.
Keywords: heavy metal, tilapiine, Osinmo reservoir, fillet, health, safety, consumption.
Source: Agraarteadus, 2018, 29(1):29–40
doi: https://dx.doi.org/10.15159/jas.18.05
Highlights:
- The analysed heavy metals showed that zinc concentration was the highest in the water samples and was also the highest in the fillets of all the cichlid species but were however within the mandatory regulatory limits.
- Comparatively, heavy metal loads of the fish fillets between the cichlid fish species from Osinmo Reservoir showed high significant differences (P < 0.05).
- Irrespective of the month of sampling, the heavy metal levels in fish fillets samples were found to increase in the order: niloticus > T. zillii > S. galilaeus.
- However, the levels of lead (11.00–26.00 µg l-1 and 15.00–31.00 µgL-1) and cadmium (6.33–13.00 µg l-1 and 2.33–12.33 µg l-1) which was the least in both water and fish fillet sample respectively, were above the recommended regulatory acceptable limit of WHO and FEPA.
- The elevated levels of lead and cadmium in the water and the fish fillet samples assayed indicated that the two elements negatively impacted the fish fillet quality, thereby raising human health consumption safety issues.
Edmond Rexhepi1, Harallamb Paçe1, Hekuran Vrapi1, Arbenita Hasani2, Elena Kokthi3
SCAB INFECTION MANAGEMENT ON APPLE LEAVES IN WESTERN BALKANS
41–49
SCAB INFECTION MANAGEMENT ON APPLE LEAVES IN WESTERN BALKANS
Edmond Rexhepi1, Harallamb Paçe1, Hekuran Vrapi1, Arbenita Hasani2, Elena Kokthi3
1Faculty of Agriculture and Environment, Agricultural University of Tirana. Koder Kazmez, Tirana 1001, Albania
2Faculty of Agriculture and Veterinary, University of Prishtina 'Hasan Prishtina'. Bulevardi B.C, Prishtina 10000, Kosovo
3Faculty of Economics and Information Technology, European University of Tirana. Bulevardi Gjergj Fishta 70, Tirana 2023, Albania
The disease of apple scab caused by the pathogen of Venturia inaequalis is a nonstop issue to the apple cultivators. The infection requires prompt and persistent treatment so as to control the infection. Today there are a few integrated pest management products (IPM) and programs for the treatment of apple scab with various application time. The aim of this study was to identify the optimal application time frame and consolidating it with few treatment programs for dealing with the apple scab disease. For this purpose, were made eight treatment programs comprising several chemical products and were realized in three distinctive treatment periods within the same season. The research is performed amid three years 2015–2017 in one experimental orchard. The formation of the experiment is two factorial randomized block with four replications. The disease infection level was evaluated on 2400 leaves from 98 apple trees. Based on analysed disease index (DI) the treatment programs and periods were compared with each other to conclude with the best combination of fungicides and application period for scab disease management on infected leaves.
Keywords: disease, index, infection, apple leaves scab, treatment.
Source: Agraarteadus, 2018, 29(1):41–49
doi: https://dx.doi.org/10.15159/jas.18.07
Edmond Rexhepi1, Harallamb Paçe1, Hekuran Vrapi1, Arbenita Hasani2, Elena Kokthi3
1Faculty of Agriculture and Environment, Agricultural University of Tirana. Koder Kazmez, Tirana 1001, Albania
2Faculty of Agriculture and Veterinary, University of Prishtina 'Hasan Prishtina'. Bulevardi B.C, Prishtina 10000, Kosovo
3Faculty of Economics and Information Technology, European University of Tirana. Bulevardi Gjergj Fishta 70, Tirana 2023, Albania
The disease of apple scab caused by the pathogen of Venturia inaequalis is a nonstop issue to the apple cultivators. The infection requires prompt and persistent treatment so as to control the infection. Today there are a few integrated pest management products (IPM) and programs for the treatment of apple scab with various application time. The aim of this study was to identify the optimal application time frame and consolidating it with few treatment programs for dealing with the apple scab disease. For this purpose, were made eight treatment programs comprising several chemical products and were realized in three distinctive treatment periods within the same season. The research is performed amid three years 2015–2017 in one experimental orchard. The formation of the experiment is two factorial randomized block with four replications. The disease infection level was evaluated on 2400 leaves from 98 apple trees. Based on analysed disease index (DI) the treatment programs and periods were compared with each other to conclude with the best combination of fungicides and application period for scab disease management on infected leaves.
Keywords: disease, index, infection, apple leaves scab, treatment.
Source: Agraarteadus, 2018, 29(1):41–49
doi: https://dx.doi.org/10.15159/jas.18.07
Highlights:
- The best action threshold for initiation of the spring fungicide treatments to manage the apple scab is established based on decision support system RIMpro. This program provided the lowest number for fungicide applications per season comparing to other treatment periods.
- The second action threshold which is developed based on six selected BBCH scale phases of the apple cultivar came up with very good results for controlling the scab infections and is recommended to be used for those apple cultivators that do not have the possibility to be connected and to interact with any decision support system provided by extension services.
- Based on disease index evaluated on eight treatment programs, the dodine in combination with copper hydroxide provided the best fungicide leaf coverage and protection from the V. inaequalis infections.
- The effects of interactions between all treatment factors is non-significant, practically the small difference of climatic conditions in three different treatment years has not affected the other effects that were derived from treatment programs realized in three different periods and therefore did not change anything significantly in regards to the protection of apple leaves from the scab infection.
Erkki Sild, Sirje Värv, Haldja Viinalass
PÄRILIKU SKREIPIRESISTENTSUSE DÜNAAMIKA EESTI LAMBATÕUGUDEL
50–56
THE DYNAMICS OF HEREDITARY SCRAPIE RESISTANCE IN ESTONIAN SHEEP BREEDS
Erkki Sild, Sirje Värv, Haldja Viinalass
Estonian University of Life Sciences, Chair of Animal Breeding and Biotechnology, Fr. R. Kreutzwaldi 1, 51006 Tartu, Estonia
A total of 2,411 sheep from the Estonian Whitehead (N = 1301) and Estonian Blackhead (N = 1110) breeds were genotyped for markers of scrapie risk in the period 2005–2017. Sanger sequencing was used to identify nucleotide substitutions in the PRNP gene at codons 136, 141, 154 and 171 to determine corresponding amino acids in prion protein. Sheep were divided into 13 groups according to their birth year to assess the temporal changes on the genetic profile of the studied population. Seven different alleles and 16 different genotypes (12 for Estonian Blackhead and 16 for Estonian Whitehead) were identified. In the birth year group 2007 (two years after the introduction of a scrapie eradication programme) a statistically significant change in the allele ALRR frequencies was found. The selective breeding for allele ALRR (the scrapie resistant marker) increased in frequency from 0.40 to 0.70 during the period 2006–2017. Significant declines in allele frequencies ALRQ (0.40–0.20) and ALRH (0.13–0.03) were found. The frequency of the most susceptible to scrapie allele (VLRQ) was low (< 0.03), and the decrease of the frequency during the program was insignificant. Both sheep breeds showed statistically significant changes in allele, genotype and risk group frequencies between the birth year groups before the introduction of the scrapie eradication programme and at its end. The effect on genetic profile in terms of changed allele frequencies was statistically more significant in the Estonian Whitehead sheep (p < 0.001) than in the Estonian Blackhead sheep (p < 0.05).
Keywords: scrapie risk, scrapie eradication program, Estonian sheep breeds, PRNP allele frequency.
Source: Agraarteadus, 2018, 29(1):50–56
doi: https://dx.doi.org/10.15159/jas.18.04
Erkki Sild, Sirje Värv, Haldja Viinalass
Estonian University of Life Sciences, Chair of Animal Breeding and Biotechnology, Fr. R. Kreutzwaldi 1, 51006 Tartu, Estonia
A total of 2,411 sheep from the Estonian Whitehead (N = 1301) and Estonian Blackhead (N = 1110) breeds were genotyped for markers of scrapie risk in the period 2005–2017. Sanger sequencing was used to identify nucleotide substitutions in the PRNP gene at codons 136, 141, 154 and 171 to determine corresponding amino acids in prion protein. Sheep were divided into 13 groups according to their birth year to assess the temporal changes on the genetic profile of the studied population. Seven different alleles and 16 different genotypes (12 for Estonian Blackhead and 16 for Estonian Whitehead) were identified. In the birth year group 2007 (two years after the introduction of a scrapie eradication programme) a statistically significant change in the allele ALRR frequencies was found. The selective breeding for allele ALRR (the scrapie resistant marker) increased in frequency from 0.40 to 0.70 during the period 2006–2017. Significant declines in allele frequencies ALRQ (0.40–0.20) and ALRH (0.13–0.03) were found. The frequency of the most susceptible to scrapie allele (VLRQ) was low (< 0.03), and the decrease of the frequency during the program was insignificant. Both sheep breeds showed statistically significant changes in allele, genotype and risk group frequencies between the birth year groups before the introduction of the scrapie eradication programme and at its end. The effect on genetic profile in terms of changed allele frequencies was statistically more significant in the Estonian Whitehead sheep (p < 0.001) than in the Estonian Blackhead sheep (p < 0.05).
Keywords: scrapie risk, scrapie eradication program, Estonian sheep breeds, PRNP allele frequency.
Source: Agraarteadus, 2018, 29(1):50–56
doi: https://dx.doi.org/10.15159/jas.18.04
Oluline:
- Skreipi riskigruppi R1 kuuluvate lammaste osatähtsus populatsioonis suurenes tauditõrjeprogrammi kestel (2005-2017) üle kahe korra.
- 2005. aastal käivitunud (marker)selektsiooni mõju populatsioonile ilmnes alates 2007. sünniaastaga lammaste grupis PRPN geeni skreipiresistentse alleeli ALRR ja genotüübi ALRR/ALRR oluliste esinemissageduste tõusutendentsidena.
- Kuuest langustendentsiga alleeli esinemissagedusest oli oluline esinemissageduse muutus nii eesti tumedapealistel kui eesti valgepealistel lammastel alleeli ALRQ puhul.
- Uuringu lõpuks, aastatel 2015-2017 sündinud lammaste hulgas, ulatus R1 riskigrupi (genotüüp ALRR/ALRR) osatähtsus 50%ni.
- Eesti valgepealisel lambatõul oli lähtepopulatsiooni PRNP geeni efektiivsete alleelide arv suurem võrreldes eesti tumedapealise lambatõuga (vastavalt 3,3 ja 2,3).
- Päriliku skreipiresistentsuse tõusuga kaasnes PRNP geeni efektiivsete alleelide arvu langus, mõlemal tõul kuni 1,5ni 2013. sünniaastagrupis.
Pille Sooväli, Tiia Kangor, Mati Koppel
BIOSTIMULAATORI JA FUNGITSIIDIGA PUHTIMISE MÕJU SUVINISU ARENGULE JA SAAGIVÕIMELE
57–62
EFFECT OF SEED TREATMENT WITH BIOSTIMULANTS AND FUNGICIDE ON DEVELOPMENT AND YIELD POTENTIAL OF SPRING WHEAT
Pille Sooväli, Tiia Kangor, Mati Koppel
Estonian Crop Research Institute, J. Aamisepa 1, 48309, Jõgeva, Estonia
In the years 2013–2014, the Estonian Crop Research Institute conducted a field trial in order to investigate the effect of seed treatment with seaweed based biostimulants and fungicide on spring wheat (Triticum aestivum L.). Seed treatments of the varieties 'Specifik' and 'Uffo' were used with (fludioxonil + cyproconazole) and without fungicide (biostimulants Raykat Start, Fertigrain Start) and mixture (fludioxonil + cyproconazole + Fertigrain Start), and untreated seed as the control were evaluated. The objective of this study was to assess the development, growth and yield potential of spring wheat under the action of biostimulants, with the presence and absence of treatment of seed with fungicide. In the laboratory, we measured: 1) the length of roots and shoots of germinated seed, 2) total number and total weight of grains per ear, 3) one kernel weight per ear. In the field, we evaluated: 4) plant height, 5) the number of generative tillers that were counted in one linear meter at physiological maturity. Results showed that the application of biostimulants and fungicide for seed treatment influence the wheat early development and growth of radicle. They can increase the root length however the biostimulants and fungicide can have an opposite effect on germination of wheat seed. They can decrease the length of the first true leaf emerged from coleoptile. We noticed that seed treatment with Raykat Start increased significantly (p ≤ 0.05) the plant height of variety 'Specifik' compared to untreated. There was tendency that by using both biostimulants for seed treatment of variety 'Specifik' more generative tillers emerged, but this was not significant compared with untreated. The results suggested that solely the seed treatment with biostimulants and fungicides, there was no effect on total grain number and total grain weight per ear of wheat varieties.
Keywords: spring wheat, seed treatment, biostimulant, fungicide, plant growth.
Source: Agraarteadus, 2018, 29(1):57–62
doi: https://dx.doi.org/10.15159/jas.18.08
Pille Sooväli, Tiia Kangor, Mati Koppel
Estonian Crop Research Institute, J. Aamisepa 1, 48309, Jõgeva, Estonia
In the years 2013–2014, the Estonian Crop Research Institute conducted a field trial in order to investigate the effect of seed treatment with seaweed based biostimulants and fungicide on spring wheat (Triticum aestivum L.). Seed treatments of the varieties 'Specifik' and 'Uffo' were used with (fludioxonil + cyproconazole) and without fungicide (biostimulants Raykat Start, Fertigrain Start) and mixture (fludioxonil + cyproconazole + Fertigrain Start), and untreated seed as the control were evaluated. The objective of this study was to assess the development, growth and yield potential of spring wheat under the action of biostimulants, with the presence and absence of treatment of seed with fungicide. In the laboratory, we measured: 1) the length of roots and shoots of germinated seed, 2) total number and total weight of grains per ear, 3) one kernel weight per ear. In the field, we evaluated: 4) plant height, 5) the number of generative tillers that were counted in one linear meter at physiological maturity. Results showed that the application of biostimulants and fungicide for seed treatment influence the wheat early development and growth of radicle. They can increase the root length however the biostimulants and fungicide can have an opposite effect on germination of wheat seed. They can decrease the length of the first true leaf emerged from coleoptile. We noticed that seed treatment with Raykat Start increased significantly (p ≤ 0.05) the plant height of variety 'Specifik' compared to untreated. There was tendency that by using both biostimulants for seed treatment of variety 'Specifik' more generative tillers emerged, but this was not significant compared with untreated. The results suggested that solely the seed treatment with biostimulants and fungicides, there was no effect on total grain number and total grain weight per ear of wheat varieties.
Keywords: spring wheat, seed treatment, biostimulant, fungicide, plant growth.
Source: Agraarteadus, 2018, 29(1):57–62
doi: https://dx.doi.org/10.15159/jas.18.08
Oluline:
- Puhtimine suurendas suvinisu hilise sordi ’Uffo’ juurestikku. Kõige enam mõjutas biostimulaator Fertigrain Start.
- Keemiline puhis ja segu biostimulaatoriga vähendas mõlemal suvinisu sordil esimese lehega tõusme pikkust tera tärkamise arengujärgus.
- Puhtimine vähendas hilise sordi ’Uffo’ taimede kõrguskasvu.
- Generatiivvõrsete arvu puhtimine oluliselt ei mõjutanud.
- Puhtimine ei mõjutanud saagikomponente, nagu terade arv ja mass peas.
Luule Tartlan1, Edvin Nugis2
SOIL BULK DENSITY AND PHYTOSANITARY CONDITIONS AT POTATO FIELD
63–68
SOIL BULK DENSITY AND PHYTOSANITARY CONDITIONS AT POTATO FIELD
Luule Tartlan1, Edvin Nugis2
1Estonian Research Institute of Agriculture, MTY, Teaduse 17a, 75501 Saku, Estonia
2Estonian Crop Research Institute, J. Aamisepa 1, 48309 Jõgeva, Estonia
The aim of this paper is to present the microorganisms and their activities and soil bulk density. It is a fact that both have a great impact on soil fertility and its health status. Among the microorganisms in soil, the bacteria and fungi are the most important ones for potato cultivation; the bacteria living on the plant roots serve to uphold the nutrient intake of plants. Our previous research has shown that Paenibacillus Polymyxa Rizobacter fostered a better uptake of phosphorus and reduced drought stress. The potato experiments were conducted in a pH range of 5.4 to 5.9, so it was environmentally favourable for the development of soil fungi. It is well known that moulds have a well-developed filiform and a high spore production. We have found that if the genus Alternaria, Helminthosporium, Fusarium, etc., has been left on the surface of the skin of potatoes then it will affect the disease. In 2010, the mould count remained within the range from 0.83·105 to 2.25·105. Also according to our assessments, an economic loss related to unfavourable soil bulk density for potato will occur if it is more than 1.25 ±0.07 Mg m-3. At the same time, it should be noted that for the Estonian soil conditions, the accepted limit of penetration resistance is 1.0 MPa.
Keywords: potato growing, soil bulk density, penetration resistance, soil water content, moulds, bacteria, fusarium, phytosanitary conditions.
Source: Agraarteadus, 2018, 29(1):63–68
doi: https://dx.doi.org/10.15159/jas.18.03
Luule Tartlan1, Edvin Nugis2
1Estonian Research Institute of Agriculture, MTY, Teaduse 17a, 75501 Saku, Estonia
2Estonian Crop Research Institute, J. Aamisepa 1, 48309 Jõgeva, Estonia
The aim of this paper is to present the microorganisms and their activities and soil bulk density. It is a fact that both have a great impact on soil fertility and its health status. Among the microorganisms in soil, the bacteria and fungi are the most important ones for potato cultivation; the bacteria living on the plant roots serve to uphold the nutrient intake of plants. Our previous research has shown that Paenibacillus Polymyxa Rizobacter fostered a better uptake of phosphorus and reduced drought stress. The potato experiments were conducted in a pH range of 5.4 to 5.9, so it was environmentally favourable for the development of soil fungi. It is well known that moulds have a well-developed filiform and a high spore production. We have found that if the genus Alternaria, Helminthosporium, Fusarium, etc., has been left on the surface of the skin of potatoes then it will affect the disease. In 2010, the mould count remained within the range from 0.83·105 to 2.25·105. Also according to our assessments, an economic loss related to unfavourable soil bulk density for potato will occur if it is more than 1.25 ±0.07 Mg m-3. At the same time, it should be noted that for the Estonian soil conditions, the accepted limit of penetration resistance is 1.0 MPa.
Keywords: potato growing, soil bulk density, penetration resistance, soil water content, moulds, bacteria, fusarium, phytosanitary conditions.
Source: Agraarteadus, 2018, 29(1):63–68
doi: https://dx.doi.org/10.15159/jas.18.03
Highlights:
- Complex estimation of soil physical properties and phytosanitary status at potato field.
- Investigation separately in great detail of soil bulk density, water content and penetration resistance.
- Applying of scientific field experiments and industrial field experiments.
- Come into the use of special profilometer for measuring the profile of potato’s furrow.
- Studying the vernalization of seed potato, the fractional uniformity of yield, an optimum soil humidity, nutrients and disease resistance.
- Recommending for further investigations the preservation of potato for food and to examine the changes in its quality during the storing period.
KROONIKA
Marko Kass, Heli Kiiman
AKADEEMILISE PÕLLUMAJANDUSE SELTSI 2017. AASTA TEGEVUSARUANNE
69–70
Marko Kass
JUUBELID JA JUUBELIOOTUS
71
Rein Viiralt
ANTS BENDER VALITI APSi AULIIKMEKS
72
JUUBELID
Tõnu Järveots
NIKOLAI KOSLOV – 90
73
Jaan Kuht
EDVIN NUGIS – 80
74–75
Katrin Kotkas
VIIVE ROSENBERG – 75
76
Meelis Ots
OLAV KÄRT – 70
77–78
Olev Saveli
ANNE LÜPSIK – 70
79–80
Marko Kass
PEEP PIIRSALU – 60
81
IN MEMORIAM
Erika Vesik
ENDEL KAAREP – in memoriam
82
Ants Bender
HEINO LÕIVEKE – in memoriam
83
Silvi Tölp
VIIVI SIKK – in memoriam
84
MÄLESTUSPÄEVAD
Anne Lüpsik
PROFESSOR LEIDA LEPAJÕE – 90
85–86
Aarne Põldvere, Kalju Eilart
LEO NIGUL – 90
87
Jaan Kuht
AIMUR JOANDI – 70
88
