eng
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
115
121
10.15159/jas.20.25
article
Precision agriculture in the North of Kazakhstan
Kendje Abdullaev
1
Bakkit Irmulatov
1
Аndrei Komarov
2
Edvin Nugis
3
A.I. Barayev Research and Production Centre for Grain Farming, Akmola oblast, Shortandy 1, Kazakhstan, e-mail: tsenter-zerna@mail.ru
Agrophysical Research Institute, St. Petersburg, Grazhdansky Prospect, 14, Russia
Estonian Crop Research Institute, J. Aamisepa 1, Jõgeva vald 48309, Estonia, edvin.nugis@mail.ee
The precision farming system has been used in the North of Kazakhstan where specialized landfill on an area of 3000 ha was formed. In the fields of the landfill, detailed agrochemical survey (accuracy) of soil samples of the southern carbonate chernozem for grid cells 1 ha and 5 ha of fieldnet treatments with were conducted. Further differentiated fertilization was carried out both with the help of Amazone ZA-M and with the use of the Bourgault sowing complex. Monitoring of the state of the soil, plant development and work performed was carried out both by traditional methods and using modern remote sensing data. After the introduction of precision farming technologies in the North Kazakhstan from 2019 precision farming technologies has been used. As a result of the work carried out only from the introduction of one element of precision farming – differentiated rationing of fertilizer application, an increase in the yield of spring wheat 'Astana' by 9.6–19.2% to the standard economic technology was established. Research results have shown that the share contribution with a high yield of 2000 kg ha–1 was significant for a sampling grid cells 1 ha of fieldnet (40–47%) and less significant for a sampling grid cells 5 ha of fieldnet (15–20%). Hence it follows that the choice of a fieldnet with grid cells 1 ha is more preferable. Due to the use of a differentiated application system the savings from reducing the consumption of mineral fertilizers for the unit of the relay have had 69.26 EUR. Our novel research has shown that for characterizing the state of plants an assessment is given which was performed using test sites 1 and 5 ha grid cells of fieldnet treatments. In this case, we have used the vegetation indices NDVI – Normalized Difference Vegetation Index. At the same time, this index has changed relatively synchronously with the results of the yield of the spring wheat.
http://agrt.emu.ee/pdf/2020_2_abdullaev.pdf
Kazakhstan
precision agriculture
differential application
spring wheat
test sites
eng
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
122
130
10.15159/jas.20.16
article
Sublethal effect of glyphosate [n-(phosphonomethyl)glycine] on growth performance and biochemical activities in some organs of Clarias gariepinus (Burchell, 1822) fingerlings
Adedamola Oladapo Akinbadewa
1
Henry Adefisayo Adewole
2
Victor Folorunso Olaleye
2
Gbenga Emmanuel Ogundepo
3
Institute of Ecology and Environmental Studies, Obafemi Awolowo University, Ile-Ife, Nigeria. hensaigebnnos_2k@yahoo.com
Department of Zoology, Obafemi Awolowo University, Ile-Ife, Nigeria
Department of Biochemistry and Molecular Biology, Obafemi Awolowo University, Ile-Ife, Nigeria
The effect of the sublethal concentration of glyphosate [N-(phosphonomethyl)glycine] on growth and some biochemical indices in the organs of African catfish (Clarias gariepinus, Burchell 1822) fingerlings in a static bioassay setup was studied to provide information on the sublethal toxicity effect of glyphosate on C. gariepinus fingerlings. Two hundred and seventy (270) fingerlings of C. gariepinus (10.02 ± 0.20g) randomly stocked at 30 fish per tank in triplicate were exposed to varying concentration (0, 2.75 ppm and 5.00 ppm) of glyphosate for 70 days. The results of the study showed that the determined growth parameters decrease with increase glyphosate concentration (except specific growth rate). The highest mortality rate was recorded in the treatment with the highest phosphate concentration (5.50 ppm). The enzymatic analyses of the fish tissue revealed that Na+/K+-ATPase activity which ranged from 0.20 to 19.29 µM Pi min–1 mg–1 protein in all the fish tissues increase with increase glyphosate concentration in the fish muscle and liver, and decreases with increase in glyphosate concentration in the gills. However, the muscle and liver malate DH activities decreased with increase in glyphosate concentration while the lactate DH activity increases with increase intoxicant concentration in the muscle (with the highest treatment having a threefold increase). Generally, the enzymatic activities of fish tissues followed the order: Malate DH >Na+/K+-ATPase>Lactate DH. The study concluded that the glyphosate concentration negatively impacted the growth and survival of C. gariepinus and also had a pronounced effect on the enzymatic activities of the studied organs.
http://agrt.emu.ee/pdf/2020_2_akinbadewa.pdf
glyphosate
enzyme
tissue, growth
sub-lethal toxicity
Clarias gariepinus
eng
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
131
138
10.15159/jas.20.20
article
Effect of water deficit and foliar application of amino acids on growth and yield of eggplant irrigated by two drip systems under greenhouse conditions
Basem Rahem Bader
1
Mohammed Ali Abood
1
Saad Enad Harfoush Aldulaimy
2
Shuker Mahmood Hassan Al-Mehmdy
2
Ghassan Jaafar Hamdi
3
Department of Soil Science and Water Resources, College of Agriculture, University of Diyala, Baqubah, Iraq
Department of Soil Science and Water Resources, College of Agriculture, University of Anbar, Ramadi, Iraq
Department of Horticulture and Landscape, College of Agriculture, University of Diyala, Baqubah, Iraq, ghassanhamdi38@gmail.com
Water deficit in semiarid areas limits eggplant (Solanum melongena L.) production and growth indicators. Suitable drip irrigation system and foliar application of amino acids may help overcome water deficit. In this work, the effects of drip irrigation system [Grand flow regulators (GR) and T-Tape], water deficit (50, 75, 100% based on field capacity) and foliar application of amino acids at 0, 100 and 200 mg L–1 on water relation of leaf's, yield and field water use efficiency (WUEf) of eggplant were studied. The experiments were arranged in a split-split plot design within a completely randomized distribution each repeated three times. GR irrigation system treatment produced the highest relative water content (RWC), most yield (TY), WUEf and the lowest of water saturation deficit (WSD) which were 74.71%, 6.50%, 5.97 t ha–1, 2.11 kg m–3 and 23.09%, respectively. The lowest water uptake capacity (WUC) and relative membrane permeability (RMP) was obtained in T-Tape irrigation system treatment (0.43% and 59.45%, respectively). The 100% irrigation level revealed higher RWC (79.32%), WSD (7.38%), most TY (6.93 t ha–1), the least of WSD (18.00%), WUC (0.28%) and RMP (39.40%). The maximum of WUEf (2.37 kg m–3) was obtained from 50% irrigation level. The foliar application of 200 mg L–1 Amino acids rate resulted in significantly maximum RWC (81.50%), WRC (7.19%), TY (6.75 t ha–1) and WUEf (2.51 kg m–3) and least WSD (15.88%), WUC (0.33%), RMP (52.02%). GR drip irrigation system is best for water use efficiency; 200 mg L–1 Amino acids produced the best response for most studied traits.
http://agrt.emu.ee/pdf/2020_2_bader.pdf
Solanum melongena
Amino decanate
foliar
water use efficiency
water deficit
eng
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
139
146
10.15159/jas.20.15
article
A theoretical and experimental study of combined agricultural gantry unit with a mineral fertiliser spreader
Volodymyr Bulgakov
1
Valerii Adamchuk
2
Volodymyr Kuvachov
3
Lyubov Shymko
1
Jüri Olt
4
National University of Life and Environmental Sciences of Ukraine, 15 Heroyiv Oborony St, UA 03041 Kyiv, Ukraine
National Scientific Centre, Institute for Agricultural Engineering and Electrification, 11 Vokzalna St, Glevakcha-1, Vasylkiv District, UA08631 Kyiv Region, Ukraine
Dmytro Motornyi Tavria State Agrotechnological University, 18B Khmelnytsky Ave, UA72310 Melitopol, Zaporizhzhia Region, Ukraine
Estonian University of Life Sciences, Institute of Technology, 56 Fr. R. Kreutzwaldi St, 51006 Tartu, Estonia, jyri.olt@emu.ee
Operations to apply mineral fertilisers to the soil are an important part of practically every form of agricultural technology. The current global trend of transitioning to bridge and gantry-type agricultural systems leaves the unanswered relevant question of the effectiveness of the technological process of applying mineral fertilisers to the soil. This is relevant because, in gantry agriculture, a section of the arable soil is separated as an engineering area. This is why the main difference in gantry agriculture from traditional methods of the bulk spreading of fertiliser onto a field is that, with gantry systems, the amount of fertiliser that lands within the engineering zone are limited. This significantly affects the manufacturing costs involved in the entire area of agricultural technology and, as a result, the production costs of the end product. This study aimed to research the patterns that are apparent in affecting the parameters involved in the use of gantry-type equipment when applying fertiliser with the parameters and operational modes of a specially-developed electric spreader of mineral fertilisers. The physical object of the study was the agricultural gantry equipment that had been developed by the authors. This equipment, which is used for spreading fertiliser, was in the form of a tractor-mounted, suspended, single-disc spreader which was known as JarMet, and which had especially been modified to run from an electrical supply. The study indicated that the biggest influence on the speed of rotation of the centrifugal disc in the mineral fertiliser spreader stems from its height above the ground, the distance of track of the agricultural gantry itself, and the aerodynamic coefficient of the fertiliser. It was determined that, for the agricultural gantry with a distance of tracks of 3.5 m, a sufficient angular speed of the single-disc centrifugal tool is 15.5 rad·s−1, with a power demand for driving this at 0.35 kW·h. When using agricultural gantries of this type with an extended track width of up to 6 m, the necessary angular speed of the centrifugal tool for spreading fertiliser increases exponentially, to 318.2 rad·s−1, with the power demand for driving it increasing to the third power.
http://agrt.emu.ee/pdf/2020_2_bulgakov.pdf
agricultural gantry system
angular speed
disk
fertiliser spreader
power
track
eng
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
147
150
10.15159/jas.20.23
article
Short Communication: Immunohistochemical study of sodium-dependent glucose co-transporters in ostriches kidneys
Piret Hussar
1
Ilmārs Dūrītis
2
Florina Popovska-Percinic
3
Tõnu Järveots
4
Faculty of Medicine, University of Tartu, Tartu 50411, Estonia
Faculty of Veterinary Medicine, Latvian University of Agriculture, Jelgava, Latvia
Faculty of Veterinary Medicine, Ss.Cyril & Methodius University in Skopje, 1000 Skopje, R. Macedonia
Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Tartu, Estonia, piretut@gmail.com
Out of the two families of glucose transporters identified, the sodium-dependent glucose co-transporters contribute to renal glucose reabsorption. Due to the lack of knowledges of the localization of SGLTs in bird's kidneys, the present study aimed to immunolocalize Na+-glucose co-transporters SGLT1 and SGLT2 in ostrich's kidneys. In the study kidney material derived from five 14 days old female ostriches. Material 0.5–1.0 cm in diameter was fixed in 10% formalin, dehydrated, embedded into paraffin; thereafter slices 7 μm in thickness were cut and deparaffinized, followed by immunohistochemical staining with polyclonal primary antibodies Rabbit anti-SGLT1 and Rabbit anti-SGLT2 (Abcam, UK) according to the manufacturers' guidelines (IHC kit, Abcam, UK). Our study revealed the immunohistochemical localization of SGLT1 and SGLT2 in the proximal tubules of the renal cortex. The immunohistochemical locations of sodium-dependent glucose transporters resembled those in mammals.
http://agrt.emu.ee/pdf/2020_2_hussar.pdf
glucose transporters
SGLT1
SGLT2
ostriches
kidneys
immunohistochemistry
est
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
151
159
10.15159/jas.20.29
article
An overview of the nitrite and nitrate contents in meat products in Estonia
Ülevaade nitritite ja nitraatide sisaldustest lihatoodetes Eestis
Sirje Jalakas
1
Mati Roasto
1
Mari Reinik
2
Terje Elias
1
Chair of Food Hygiene and Public Health, Institute of Veterinary Medicine and Animal Science, Estonian University of Life Sciences, 56/3 Fr. R. Kreutzwaldi St, 51006Tartu, Estonia, terje.elias@emu.ee
Tartu Laboratory, Health Board, 1a Põllu St, 50303 Tartu, Estonia
This study examined the nitrite and nitrate content in processed meat products in Estonia. The study shows the levels of nitrites and nitrates in meat products and compares the results with data from the previous study periods. All meat products, which needed heat treatment according to the manufacturer's instructions, were heat-treated prior analyses. Among analysed meat products (n=164), the highest nitrite concentration was 93.1 mg kg–1 and it was determined in uncooked meat preparation product. The overall mean nitrite concentration among nitrite contained meat products varied from 9.7–30.3 mg kg–1 depending on the meat product category. The highest mean nitrite concentrations were found in sausages and pates. There were large differences in the nitrite content of the products of different producers, ranging from the detection limit to 93.1 mg kg–1. The largest differences in nitrite contents were observed in the cooked sausages of one manufacturer, in which the nitrite content was from the detection limit up to 61.5 mg kg–1 in the product. The nitrite and nitrate contents of different meat products also varied widely between producers and were different for each product group. By the Regulation (EC 1333/2008) taking into account the maximum levels for nitrites and nitrates allowed to be added to the meat products, there were no exceedances detected. In the comparison of previous and present study periods, it can be summarised that sodium nitrite (NaNO2) levels are lower in cooked sausages, smoked sausages and wieners, and the content of sodium nitrate (NaNO3) in various meat products is considerably decreased.
http://agrt.emu.ee/pdf/2020_2_jalakas.pdf
nitrite content
nitrate content
meat producers
meat products
eng
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
160
166
10.15159/jas.20.24
article
Nutrient intake, digestibility and nitrogen balance of West African Dwarf goats fed cassava root sievate and cassava leaf meal mixture in their diets
Peter-Damian Chukwunomso Jiwuba
1
Department of Animal Production Technology, Federal College of Agriculture, P.M.B.7008, Ishiagu, Ebonyi State, Nigeria,jiwubapc@gmail.com
Four West African Dwarf (WAD) bucks averaging 7.62 kg and aged 8–10 months ere used to determine the intake, body weight changes, digestibility and nitrogen balance of cassava root sievate-cassava leaf meal mixture based diets. The four experimental diets (T1, T2, T3 and T4) were formulated to contain palm kernel cake, brewers' dried grain, molasses, bone meal, limestone, meal, common salt and 0, 20, 40 and 60% cassava root sievate-cassava leaf meal mixture at the rate of 3:1 respectively. The diets were assigned individually to the four animals in metabolism cages in a 4×4 Latin square design experiment. Feed intake, body weight gain, dry matter intake (DMI), nutrient digestibility and the nitrogen balance status of each animal were measured. Results on proximate composition revealed that the nutrient requirements of the goats were adequate. The DMI for the supplement, total DMI, total DMI (g (kg W0.75)–1), CF intake were highest (P < 0.05) for T4. Average body weight gain (g day–1) and average body weight gain (g (kg W0.75)–1) were best (P < 0.05) for T3 and T4. Crude protein digestibility was best (P < 0.05) for T4. Neutral detergent fibre and acid detergent fibre digestibilities were best for T3 and T4. Nitrogen intake (g day–1), nitrogen balance (g day–1) (g (W kg0.75)–1), nitrogen retention (%), nitrogen absorbed (g day–1) (g (W kg0.75)–1), apparent N digestibility (%) and the efficiency of nitrogen utilization were all best (P < 0.05) for and T4. The diet (T4) containing 60% CRSCLM mixture was recommended among the other diets for feeding goats, as it had better performance concerning nutrient intake, body weight gain, nutrient digestibility and utilization.
http://agrt.emu.ee/pdf/2020_2_jiwuba.pdf
nutrient intake
digestibility
utilization
body weight gain
cassava
goats
eng
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
167
172
10.15159/jas.20.13
article
Aromatic plant Melissa officinalis extracts selectivity in various biomass crop and legume species
Panagiotis Kanatas
1
Ioannis Gazoulis
2
Ioanna Kakabouki
2
Panayiota Papastylianou
2
Agricultural Cooperative of Mesolonghi-Nafpaktia, 30200 Mesolonghi, Greece, pakanatas@gmail.com
Agricultural University of Athens, 11855, Athens, Greece
Allelopathic effects of various plants can be exploited for use against weeds; however, the selectivity in different crops is also important. In the current study, the effects of lemon balm (Melissa officinalis) allelochemicals on seed germination and seedling emergence of three biomass crops and three legume species were evaluated. Seed germination of rapeseed was reduced by 19, 30, 56, and 80% in the concentrations of 1, 2, 5 and 10%, respectively, as compared to the control group, whereas sweet sorghum seeds showed a more intermediate response and sunflower germination was affected only by the highest concentration. Seed germination of common bean was by 25, 34 and 60% lower at 1, 2 and 5% extract concentrations, respectively, in comparison to the control whereas up to 85% reduction of seed germination was recorded in 10% concentration. Peanut seed germination percentage ranged between 72 and 47% of control in 5 and 10% concentrations, respectively, while soybean germination was least affected from M. officinalis leaf extracts since it was reduced by only 25 and 41% in 5 and 10% concentrations, respectively, as compared to the control. Seedling emergence of rapeseed was reduced by 14, 25, 46, and 79% in the concentrations of 1, 2, 5 and 10%, respectively, as compared to the control whereas lemon balm extracts showed increased selectivity on the sunflower. Soybean emergence was reduced by only 27 and 46% in 5 and 10% concentrations, respectively, in comparison to the control whereas common bean’s seedling emergence was reduced up to 35% even in 2% concentration. Allelopathic response index values confirmed that sunflower and rapeseed were the least and most sensitive biomass crops to lemon balm allelochemicals, respectively, whereas sweet sorghum showed an intermediate response. Increased was the selectivity of the aqueous leaf extracts on soybean, whereas seed germination and seedling emergence of peanut were more affected and common bean was the most sensitive crop. Further research is needed to investigate the selectivity of M. officinalis and other aromatic plants’ allelochemicals on various crops and under different soil and climatic conditions to optimize their efficacy as tools of more eco-friendly weed management strategies.
http://agrt.emu.ee/pdf/2020_2_kanatas.pdf
Melissa officinalis
allelopathy
selectivity
biomass crops
legume
eng
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
173
180
10.15159/jas.20.14
article
Application of the differential scanning calorimetry method in the study of the tomato fruits drying process
Inha Kuznietsova
1
Valentyna Bandura
2
Vаdym Paziuk
1
Oleksii Tokarchuk
2
Ihor Kupchuk
2
Institute of Engineering Thermophysics of NAS of Ukraine, 2a Zhelyabova St, UA 03057, Kiev, Ukraine
Vinnytsia National Agrarian University, 3 Sonyachna St, UA 21008, Vinnytsia, Ukraine, kupchuk.igor@i.ua
Structural changes in the process of heating fresh fruit, sun-dried fruits and powder obtained from the dried tomato fruits were studied by differential scanning calorimetry method application. The kinetics of the shredded fruits in the dryer proves the prospects for using convective drying, which is performed for 295 minutes. The kinetic coefficients of drying and critical moisture content in the crushed fruits of tomato were determined. The kinetic coefficients were determined by the graphical-analytical method: a = 0.839, ln(α) = 1.3 and α (1 s–1) = 0.262. It was determined that the critical maximum moisture content for drying the shredded fruits of tomatoes is 1.503% mm–1, after what the process of combustion of vegetable tissue begins. The application of the differential scanning calorimetry (DSC) method allowed the fuller study of the mechanism of drying the fruits of tomato in different condition: fresh, sun-dried and dried. It was determined that the greatest amount of energy is consumed to remove free moisture (1,993 J g–1) from the fresh tomatoes. At the same time, when being cooled, crystallization in plant tissue occurs with the release of energy in the amount of 0.03922 J g–1. When drying the previously sun-dried tomatoes the process of moisture removal and the partial decomposition of the compounds that are unstable to temperature is completed. At the same time, at the 129.61 °C temperature in the powder obtained from the fruits of tomatoes, melting of carbohydrates and other compounds occurred. Thus, this confirms the need to observe the normalized value of the mass fraction of moisture in the powders in the process of their packaging, storage and use. The basic technological system of production of powder from dried fruits of tomatoes is offered.
http://agrt.emu.ee/pdf/2020_2_kuznietsova.pdf
tomatoes, drying
method
moisture
crystallization
carotene-containing raw materials
est
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
181
190
10.15159/jas.20.21
article
Organic carbon and nitrogen content in Estonian erosion-affected soils
Eesti erosioonist häiritud muldade orgaanilise süsiniku- ja lämmastikusisaldus
Raimo Kõlli
1
Karin Kauer
1
Tõnu Tõnutare
1
Estonian University of Life Sciences, Institute of Agricultural and Environmental Sciences, Chair of Soil Science, Fr. R. Kreutzwaldi 5, 51006 Tartu, Estonia, raimo.kolli@emu.ee
The work is dedicated to the characterization of erosion-affected soils' (EAS) humus status (HS) in pedo-ecological conditions of South-Eastern Estonia. For understanding HS of EAS their organic carbon (OC) and total nitrogen (NT) sequestration capacities and the ratio C:N was studied by separate soil layers. The average data about soil OC and NT contents (g kg–1) and superficial densities (Mg ha–1) are given by arable soil species. The analysis of reflecting EAS HS on four research areas (Valgjärve, Otepää, Haanja and Mooste) was carried out on the basis of four different origin databases. The analysis of OC content is done by Tjurin and NT by Kjeldahl. In soil associations of erosion-affected areas' the following groups of soils were distinguished: eroded (E), deluvial (D), neutral (N) and non-eroded (En) soils. The HC thicknesses of research area Valgjärve E soils are in limits 18–23 cm, D soils 30–65 cm and of En soils 22–27 cm. The medians of same soils OC concentrations are accordingly 9.4, 11.2 and 10.9 g kg–1 and ratios C:N accordingly 9.8, 9.4 and 10.2. The OC stocks given in the limits of quartiles are in E soils 24–36, D soils 51–143 and En soils 32–49 Mg ha–1. Therefore on eroded areas the perpetual continuums of soil properties' (among these HS) changes may be followed and it is very complicated to separate soil contours on 1:10 000 soil maps. In this work the transitional areas between E and D soils are characterized via N soils. On erosion-affected areas the E and D soils form different soil associations with auto- and hydromorphic normally developed non-eroded soils, where very commonly as well the fluvial (abnormal) soils are presented. The relatively high pedodiversity caused by the areas high geodiversity, is the requisite to the high biodiversity. In erosion-affected regions is extremely important to maintain agricultural activity, as with this is ensured the persistence of naturally beautiful landscapes. The soil cover with EAS acts as accumulator of formed on the same area soil OC.
http://agrt.emu.ee/pdf/2020_2_kolli.pdf
erosion-affected soils
water and tillage erosion
total nitrogen
soil organic carbon
humus status
sustainable soil management
soil association
eng
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
191
195
10.15159/jas.20.17
article
Bio-fertilizer activity of Trichoderma viride and Pseudomonas fluorescens as growth and yield promoter for maize
Bikram Nepali
1
Subash Subedi
2
Sabin Bhattarai
1
Santhosh Marahatta
1
Devashish Bhandari
1
Jiban Shresthas
3
Agriculture and Forestry University, Rampur, 15, Bharatpur Metropolitan City, Chitwan, 44209, Nepal
National Maize Research Program, Rampur, 15, Bharatpur Metropolitan City, Chitwan, 44209, Nepal
National Plant Breeding and Genetics Research Centre, Khumaltar, 15, Lalitpur Metropolitan City, 44700, Nepal, bikramn25@gmail.com
The bio-fertilizer potential of Trichoderma viride and Pseudomonas fluorescens on growth and yield performance of open-pollinated maize variety Rampur Composite was studied at the research farm of Agriculture and Forestry University (AFU), Rampur, Chitwan, Nepal during the winter season of 2018/19. The experiment was laid out in randomized complete block design with seven treatments (T1: recommended dose of NPK (120:60:40 kg NPK ha–1), T2: T. viride only, T3: P. fluorescens only, T4: T. viride + 50% NPK; T5: P. fluorescens + 50% NPK; T6: T. viride + P. fluorescens + 100 % NPK, T7: control) and replicated thrice. The package of agronomic practices was followed as per national recommendation. The result revealed that T. viride + 50% NPK enhanced most of the growth components like plant height (103%), leaf number (9.77%), stem diameter (73.98%), root length (40.57%), leaf area index (173.28%), leaf biomass (83.36%) and stem biomass (127.72%) of maize compared to the control. Similarly, the higher cob biomass (641 g), yield (5708 kg ha–1) and thousand kernel weight (295 g) were recorded in the plot applied to P. fluorescens + 50% NPK. The use of Trichoderma viride and Pseudomonas fluorescens with a half-dose of recommended fertilizers may increase the vegetative growth and yield of maize and may also help to reduce the rate of chemical fertilizers in maize.
http://agrt.emu.ee/pdf/2020_2_nepali.pdf
growth
maize
Pseudomonas fluorescens
Trichoderma Viride
bio-fertilizer
yield
eng
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
196
201
10.15159/jas.20.28
article
Influence of fertilizing with modern complex organic-mineral fertilizers to grain yield and quality of winter wheat in the southern steppe of Ukraine
Antonina Panfilova
1
Valentina Gamayunova
1
Irina Smirnova
1
Mykolayiv National Agrarian University, 9 George Gongadze St, 54020, Mykolayiv, Ukraine, panfilovaantonina@ukr.net
This article presents the results of using different varieties, variants of nutrition and their impact on the yield and grain quality of winter wheat. Experimental studies were conducted during 2011–2016 on the experimental field of the Mykolayiv National Agrarian University, Ukraine. The technology of growing winter wheat in the experiment, except the studied factors, was generally accepted to the existing zonal recommendations for the southern steppe of Ukraine. The predecessor was peas (Pisum sativum L.) It was determined that the higher grain yield and slightly better quality indicators differed grain of the studied winter wheat varieties with the joint use of pre-sowing application of N30P30 and foliar fertilizing of winter wheat crops twice during the vegetation season by Escort-bio. Thus, for this variant of nutrition, the crude gluten content of winter wheat grain was 24.2 up to 25.1%, the protein content was 12.9 up to 13.2%, and the conditional protein yield of from 1 ha of sowing area was 0.58–0.66 t depending on the studied variety. At the same time, on average, according to the nutrition factor, plants of the 'Zamozhnist' variety in comparison with the 'Kolchuga' variety formed more by 9.3% of the grain, which had the best quality indicators.
http://agrt.emu.ee/pdf/2020_2_panfilova.pdf
winter wheat
variety
plant nutrition
growth-regulating preparations
yield
grain quality
eng
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
202
207
10.15159/jas.20.26
article
Experimental research into impact of kinematic and design parameters of a spiral potato separator on quality of plant residues and soil separation
Zinoviy Ruzhylo
1
Volodymyr Bulgakov
1
Valerii Adamchuk
2
Anatoliy Bondarchuk
3
Yevhen Ihnatiev
4
Valentyna Krutyakova
5
Jüri Olt
6
National University of Life and Environmental Sciences of Ukraine, 15 Heroyiv Oborony St, UA03041 Kyiv, Ukraine
Institute of Mechanization and Electrification of Agriculture, National Scientific Centre, 11 Vokzalna St, Glevakha Stl, Vasylkivsky Dist, UA08631 Kyiv Region, Ukraine
Institute of Potato Growing of NAAS of Ukraine, 22 Chkalov St, Nemishaeve Vlg, Borodyanka Dist, UA07853 Kyiv Region, Ukraine
Dmytro Motornyi Tavria State Agrotechnological University, 18B Khmelnytsky Ave, UA72310 Melitopol, Zaporozhye Region, Ukraine
Engineering and Technological Institute Biotechnica NAASU, Ukraine, 26, Mayatska Rd, Hlibodarske Vlg, Bilyaisky Dist, Odessa region, UA67667, Ukraine
Institute of Technology, Estonian University of Life Sciences, 56 Fr. R. Kreutzwaldi St, 51006 Tartu, Estonia, jyri.olt@emu.ee
The experimental investigations carried out in field production conditions have proved that the process of cleaning potato tubers from extraneous material with the use of a spiral separator takes place due to the active conveyance of the heap by the turns of the cantilever mounted cleaning spiral springs. The cleaning spiral springs not only rotate at the set angular velocity, but simultaneously their cantilevered ends perform oscillatory motion, which arises due to the deflection of their longitudinal axes under the action of the weight of the potato heap fed into the work zone of the separator. The results obtained in the process of the field experiment investigations carried out by the authors have provided for obtaining the relations that enable selecting the optimum design and kinematic parameters of the spiral-type potato cleaning devices for the targeted separation rate and, accordingly, estimating their impact on the quality of the performed work process.
http://agrt.emu.ee/pdf/2020_2_ryzhylo.pdf
cleaning device
plant residues
potato tuber
quality
separation
soil
spiral roll
eng
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
208
211
10.15159/jas.20.19
article
Short Communication: Changes of compatible solutes content in Triticum aestivum and Triticum dicoccum seedlings in response to drought stress
Oleksandr Smirnov
1
Andrii Zinchenko
1
Leila-Аnastasiia Karpets
1
Mariia Kovalenko
1
Nataliya Taran
1
Educational and Scientific Centre "Institute of Biology and Medicine", Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska St, Kyiv 01601, Ukraine, plantaphys@gmail.com
The influence of drought stress modelling by polyethene glycol (PEG) on water status, total soluble protein, proline and carbohydrates content in the roots and leaves tissues of three drought resistance wheat genotypes – Triticum aestivum L. (Podolianka, Favorytka) and Triticum dicoccum Schrank. (Holikovska) have been studied. Tested varieties of bread wheat and emmer wheat presented the resilience-anisohydric strategy for water balance regulation retaining a high level of relative water content, great variability in organic solutes with osmoprotective properties (total soluble protein, total carbohydrates and free proline) accumulation and retaining the level of low molecular weight proteins in response to drought with noticeable distinctions amid the varieties. However, drought stress increased the efficiency of accumulation of osmoprotectants either protein or carbohydrate nature in all three tested varieties of wheat seedlings.
http://agrt.emu.ee/pdf/2020_2_smirnov.pdf
drought stress
Triticum aestivum
Triticum dicoccum
osmoregulators
resilience-anisohydric strategy
eng
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
212
218
10.15159/jas.20.22
article
Analytical study of soil strain rate with a ploughshare for uncovering slit
Olena Solona
1
Volodymyr Kovbasa
1
Ihor Kupchuk
1
Vinnytsia National Agrarian University, 3 Sonyachna St, UA 21008, Vinnytsia, Ukraine, kupchuk.igor@i.ua
The article is devoted to solving one of the most important tasks of substantiating rational design and technological parameters of the working body for the installation of elements of subsurface irrigation. To reduce the frictional resistance during pulling of intra-soil irrigation communications, it becomes necessary to form a cavity inside the soil. The energy efficiency of such a process is determined by the traction resistance and directly depends on the normal and shear stresses of the soil as a result of its relative deformation during interaction with a special working body – the share of a mole plough. The geometric shape and kinematic parameters of the share, together with the mechanical characteristics of the soil, have the greatest influence on the nature of the relative deformation. Therefore, the purpose of the article is to determine the functional dependences of the components of the soil deformation rates on the geometric and kinematic parameters of the working body surface. These equations are necessary to determine the stress components in the soil, which make it possible to determine the compaction of the soil on the walls of the formed cavity (molehill), as well as the components of the forces of resistance to the movement of the working body.
http://agrt.emu.ee/pdf/2020_2_solona.pdf
subsoil irrigation
trenchless laying
molehill
geometric parameters
share
soil deformation rate
eng
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
219
243
10.15159/jas.20.27
article
Modular-vitality and ideotypical approach in evaluating the efficiency of construction of oilseed radish agrophytocenosises (Raphanus sativus var. oleifera Pers.)
Yaroslav H. Tsytsiura
1
Faculty of Agronomy and Forestry, Vinnytsia National Agrarian University, 3 Sonyachna St, 21008, Vinnytsia, Ukraine, yaroslavtsytsyura@ukr.net
The paper provides the results of a multi-year study of the peculiarities of phytocoenology of oilseed radish agrophytocenosises using various methods of its condition assessment and studying the tactics of plant vitality strategy. A comprehensive assessment was made of the impact of changes in inter-row spacing width, sowing rates and fertilizer on the formation of different plant ideotypes, the variability of their morphological features and general indicators of viability. Three ideotypes of oilseed radish plants in the vertical study of agrophytocenosises were identified, based on which a detailed analysis of the variability of each group and a statistical assessment of the reliability of its existence was made. The peculiarities of morphological integration of each tier were analyzed and its influence on the formation of the overall field capacity was assessed. Based on the modular and vitality grouping, the efficiency and feasibility of combining different stand density and fertilizer options in the range of 30–90 kg of primary material per 1 hectare were evaluated. Due to the application of regression analysis, the impact of climatic conditions on the formation of different morphological types of plants and the nature of relationships between oilseed radish plants in cenosises of different stand densities with different fertilizer options was assessed. The main perspective directions of further research on the peculiarities of the creation of highly productive and highly adaptive agrophytocenosises of oilseed radish are outlined.
http://agrt.emu.ee/pdf/2020_2_tsytsiura.pdf
oilseed radish
vitality
variability
capacity
vitality tactics
plant ideotype
agrophytocenosis layering
eng
Estonian Academic Agricultural Society
Agraarteadus
1024-0845
2228-4893
2020-12-31
31
2
244
253
10.15159/jas.20.18
article
Growth and yield responses of potato (Solanum tuberosum L.) to biochar
Kalika Prasad Upadhyay
1
Narayan Bahadur Dhami
2
Prem Nidhi Sharma
3
Janaki Datta Neupane
1
Jiban Shrestha
4
National Potato Research Program, Khumaltar 15, Lalitpur Metropolitan City, 44700, Nepal, kalikaupadhyay@yahoo.com
Hill Crops Research Program, Baiteshwor 4, Kabre, Dolakha, Baiteshwor Rural Municipality, 45500, Nepal
National Entomology Research Centre, Khumaltar 15, Lalitpur Metropolitan City, 44700, Nepal
National Plant Breeding and Genetics Research Centre, Khumaltar15, Lalitpur Metropolitan City, 44700, Nepal
The response of five types of biochar (Lantana camara, Ipomoea carnea, rice husk, sawdust, no biochar) on growth and yield attributes of potato was evaluated. The experiment was laid out in randomized complete block design with six replications in rainfed areas of two different environments (Jiri in 2018 and Pawati in 2019) of Nepal. The popular early maturing potato variety 'Desiree' was used in the experiment. The spacing was maintained 60 cm between rows and 25 cm between plants in the plot size of 7.2 m2. Seed tubers were planted in the 1st week of February and harvested in the 4th week of May. Recommended fertilizers (100:100:60 kg ha–1 NPK + 20 t ha–1 farmyard manure) and biochars at 2 t ha–1 were applied to the soil. Seed tubers were completely covered with an equal amount of biochar before covering with the soil. The results revealed that the total yield and marketable yield of potato varied with biochars types. The potato tuber yield was found higher and red ants infestation was lower in plots applied with biochars as compared to control plots (without biochars). The use of biochars derived from Lantana camera produced the highest number of tubers (6.1 tubers plant–1), the greatest weight of tubers (286.1 g plant–1) and the least damage of red ants on tubers (4.7%) followed by sawdust (6.0 tubers plant–1, 263.6 g tuber weight plant–1 and 7.8% damaged tubers by red ants). The findings provide new information on the understanding of biochar effect on increased marketable yield of potato in rainfed lands by reducing damage from red ants.
http://agrt.emu.ee/pdf/2020_2_upadhyay.pdf
biochar
potato
red ant
yield