TOP 10

Enim allalaetud artiklid Agraarteaduse kodulehel. 

1. Lassen, B., Järvis, T., Mägi, E.  
  Seedekulgla parasiidid Eesti saarte lammastel (208)
Agraarteadus 2013 * XXIV * 1.
7-14
 
Abstract
Gastrointestinal parasites of sheep on Estonian islands
Lassen, B., Järvis, T., Mägi, E.
Parasites are important production-limiting diseases in livestock farming. Their proper treatment and control requires knowledge of their presence, epidemiology, and diagnostics. We investigated the presence of the GI parasites in pooled herd faecal samples from the islands Saaremaa (n=21), Hiiumaa (n=18), and Vormsi (n=7), collected in 2011-2012. The samples were investigated microscopically after quantitative flotation, acid-fast contrast staining for Cryptosporidium oocysts, and direct immunofluorescence for Giardia cysts. Findings included nematodes: Strongylida spp. (94.6%), Strongyloides spp. (70.7%), Trichuris spp. (9.8%); protozoans: Eimeria spp. (94.6%), Giardia spp. (69.6%), Cryptosporidium spp. (60.9%); cestodes: Moniezia spp. (22.8%); and trematodes: Dicrocoelium spp. (3.3%). E. spp. oocysts and Strongylida eggs were shed in levels that may indicate problems in some herds. The most dominant species of Eimeria was the pathogenic E. ovinoidalis (64.4%), but the other clinicallyimportant species, E. cranadallis did not dominate any samples. Based on the presented findings, it appeared that the herds had different parasitic problems needing evidence based treatments for sustainable control.
Keywords: sheep, parasites, protozoa, nematoda, cestoda, trematoda, prevalence
Addidional material: Figure 1; Figure 2
Allikas: Agraarteadus 2012 (24) 1:7-14

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OTSELINK
http://agrt.emu.ee/pdf/2013_1_lassen1.pdf
Author Contact
Estonian University of Life Sciences, Institute of Veterinary Medicine and Animal Sciences, Kreutzwaldi 62, 51014 Tartu, Estonia
E-mail: brian.lassen@gmail.com
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2. B. Lassen  
  Aususe devalveerumine teaduses (202)
Agraarteadus 2014 * XXV * 1.
48-49
 
Abstract
Corruption of scientific integrity
B. Lassen

Keywords: science, integrity, fraud, administration, publishing, authorship
Allikas: Agraarteadus 2014 (25) 1:48-49

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http://agrt.emu.ee/pdf/2014_1_lassen.pdf
Author Contact
Estonian University of Life Sciences, Institute of Veterinary Medicine and Animal Sciences, Kreutzwaldi 62, 51014 Tartu, Estonia
E-mail: brian.lassen@gmail.com
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3. Kaldmäe, H., Kass, M., Leming, R., Ots, M.  
  Kuumtöötlemise mõju rapsikoogi proteiini kvaliteedile (145)
Agraarteadus 2013 * XXIV * 1.
3-6
 
Abstract
Effect of heat treatment on rapeseed cake protein quality
Kaldmäe, H., Kass, M., Leming, R., Ots, M.
Cold-pressed rapeseed cake are poor sources of ruminal undegraded protein (RUP), protein effective degradability were 85–89%. Heat treatment is one of the most common method use to reduce ruminal protein degradation. Changes of treatment temperature had the greatest effect on the solubility and ruminal degradability of rapeseed cake protein. The higher treatment temperature of the seeds resulted in lower and slower ruminal degradabilty of rapeseed cake protein. The results of defferent study show that heating temperature and duration of heating were both important in protecting rapeseed protein for ruminal degradation. It was concluded from that studies that heating rapeseed 100 °C for 20 min in the present case conditions is a viable method to reduce ruminal degradability of rapeseed cake protein without compromising the intestinal digestibility of RUP.
Keywords: rapeseed cake, heat treatment, protein degradation
Allikas: Agraarteadus 2013 (24) 1:3-6

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OTSELINK
http://agrt.emu.ee/pdf/2013_1_kaldmae.pdf
Author Contact
Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu
E-mail: helgi.kaldmae@emu.ee
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4. Ling, K., Ilves, A., Jaakson, H., Olt, A., Ots, M.  
  Lüpsilehmade seleeniga varustatus Eestis  (133)
Agraarteadus 2013 * XXIV * 1.
15-20
 
Abstract
The selenium status of dairy cows in Estonia
Ling, K., Ilves, A., Jaakson, H., Olt, A., Ots, M.
Based on earlier soil, forage and animal studies, Estonia is considered a Se-deficient country where Se supplementation of dairy cows has been routine practice for more than 10 years. To evaluate the current Se status of Estonian dairy cows, bulk tank milk samples (n = 218) from farms (n = 110) producing over 60% of the milk purchased in the counties of Estonia, were analysed for the Se concentration. Milk Se content ranged from 5 – 34 μg/kg. The mean Se content of all the samples was 16 μg/kg, indicating dairy cows’ Se status was from high-marginal to adequate depending on the reference level used. The results of the study provide evidence that the Se status of dairy cattle in Estonia has improved. Although Se status was satisfactory on 99 farms (90.8%) there were 10 farms (9.2%) with a milk Se concentration of less than or equal to 10 μg/kg where attention should be given to Se supplementation of the animals.
Keywords: bulk milk, trace elements, silage, nutrient deficiency
Allikas: Agraarteadus 2013 (24) 1:15-20

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OTSELINK
http://agrt.emu.ee/pdf/2013_1_ling.pdf
Author Contact
Estonian University of Life Sciences, Institute of Veterinary Medicine and Animal Sciences, Tartu 51014, Estonia
E-mail: katri.ling@emu.ee
Phone: +373 731 3480, +372 515 2696
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5. A. Bender  
  Kokkuvõte Jõgeval läbiviidud päideroo (Phalaris arundinacea L.) seemnekasvatuse katsete tulemustest (134)
Agraarteadus 2014 * XXV * 1.
3-16
 
Abstract
Summary of trial results of reed canarygrass (Phalaris arundinacea L.) seed production that were conducted at Jõgeva
A. Bender
Reed canarygrass (Phalaris arundinacea L.) is a naturally widespread grass in Estonia, which so far has successfully been used as a dominant species in the stands of cultural meadows on reclaimed alluvial and peat soils. Because of high and stable dry matter yield through years, in the past decades the species has been started to be used in addition to fodder production also as raw material for cellulose and energy pro-duction. Compared to other grasses, reed canarygrass is characterized by a moderate and unstable seed yield. In the years 2008–2013 a number of experiments was conducted at the Jõgeva Plant Breeding Institute in order to investigate the effect of seeding rate (4, 6, 8, 10 kg ha-1), row spacing (15, 30, 45, 60 cm), nitrogen fertilizer rate (N 70, 105, 140 kg ha-1) and cutting time of stubble hay (July, October, April) on the seed yield of reed canarygrass. The trial results indicated that when the seed field was established with narrow spacing (15 cm), seeding rate of 4–6 kg ha-1 and nitrogen was applied at the rate of N 140 kg ha-1, the reed canarygrass "Pedja" yielded in the first two years of use up to 430 kg of seed per hectare. In the following years of use the seed yield dropped drastically. It was expedient to cut the stubble hay at the end of the vegetation period (October) or even next spring (April). Besides the seed yield, it was possible to harvest from the trials 5–8 t ha-1 of dry matter the energetic value of which was 140 GJ. The moisture content of straw harvested in July was 14.5–20.3%, of stubble hay harvested in April 14.3–15.2%. The straw of reed canarygrass as well as the stubble hay harvested in April can be used as energy hay, the sales revenue of which made 12% of the total estimated sales revenue.
Keywords: reed canarygrass, seeding rate, row spacing, nitrogen fertilizer, harvest time of stubble hay, seed yield, biofuel
Allikas: Agraarteadus 2014 (25) 1:3-16

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http://agrt.emu.ee/pdf/2014_1_bender.pdf
Author Contact
Estonian Crop Research Institute, Aamisepa 1, 48309 Jõgeva
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6. R. Kõlli, I. Tamm  
  "Aasta 2014 muld" − leostunud muld (128)
Agraarteadus 2014 * XXV * 1.
30-38
 
Abstract
"Year 2014 soil" − the leached soil
R. Kõlli, I. Tamm
By Estonian Soil Sciences Society for the year 2014 soil the leached soils as one of the best arable soils of Estonia was elected. After WRB these soils embrace mainly Haplic & Endogleyic Cambisols (calcaric, endoskeletic). The area of leached soils forms 7.7% from whole Estonian soil cover or a little bit more than 3250 km2. In overview on Estonian year 2014 soil the morphology, genesis, classification, humus status and different properties (chemical, physical, hydro-physical) are treated on detail level of Estonian Soil Classification, for which are soil species (identified by soil genesis) and soil varieties (divided on the basis of soil texture). Besides abovementioned characteristics the productivity, environment protection ability in dependence upon soil functioning and properties, usage in agriculture and forestry, and distribution in Estonia of leached soils is analysed.
Keywords: leached soils, year 2014 soil, cambisols, soil properties
Allikas: Agraarteadus 2014 (25) 1:30-38

Prindi

OTSELINK
http://agrt.emu.ee/pdf/2014_1_kolli.pdf
AUTORI KONTAKT
Eesti Maaülikool, F.R. Kreutzwaldi 1a, 51014 Tartu
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7. A.-H. Viira, R. Omel, R. Värnik, H. Luik, B. Maasing, R. Põldaru
  Competitiveness of the Estonian dairy sector, 1994–2014 (122)
Agraarteadus 2015 * XXVI * 2.
84
 
Abstract
Competitiveness of the Estonian dairy sector, 1994–2014
A.-H. Viira, R. Omel, R. Värnik, H. Luik, B. Maasing, R. Põldaru
Historically, the dairy sector has been one of the most important and competitive branches of the Estonian agriculture and food industry. Since the beginning of the transitional period 25 years ago, Estonian society and its economy have gone through significant institutional, political and societal changes, which have also affected the dairy sector. This paper provides a review of the competitiveness of the Estonian dairy sector. The competitiveness of dairy farms, the dairy processing industry and dairy exports are discussed from several perspectives applied in the studies of competitiveness. Also, the context of the transition to a market economy and institutional, policy and market changes are considered. In the past 20 years, the Estonian dairy sector has maintained its competitiveness in export markets. However, there are several aspects that need to be addressed in order to maintain competitiveness in the long term. Estonian dairy farms need to increase their total factor productivity. The negative trends in the declining lifespan of dairy cows and declining content of milk components should be stopped. The Estonian dairy processing industry needs to increase labour productivity and value per kg of processed milk. To avoid the negative effects of specialisation on certain products and markets, the portfolio of export markets and products should be expanded. The EU dairy market is going through deregulation, and farm payments in Estonia fell in 2014. This is not the first time in 20 years that agricultural policy has not been overly protective of the dairy sector. Therefore, the future competitiveness of the Estonian dairy sector depends mainly on its adaptive capacity in the light of changing markets, policies and institutions.
Keywords:
competitiveness, dairy sector, productivity, revealed compa¬rative advantage, export, Estonia
Source: Agraarteadus 2015 (26) 2:84-104

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OTSELINK
http://agrt.emu.ee/pdf/2015_2_viira.pdf
AUTORIKONTAKT
Estonian University of Life Sciences, Institute of Economics and Social Sciences, Fr. R. Kreutzwaldi 1, Tartu 51014, Estonia
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8. J. Olt, M. Arak  
  Motoplokk-tüüpi mustikakombaini korjehaspli konstruktsioon ja arendus  (105)
Agraarteadus 2012 * XXIII * 2.
21-26
 
Abstract
Design and development of the picking reel of motoblock-type harvester
J. Olt, M. Arak
This paper approaches the features of designing the picking reel of blueberry harvester. The design of picking rake was based on the resistance of rake teeth to repeated bending during the work process. This quality was evaluated according to the plastic deformation rate of rake teeth material. Repeated bending experiments were performed to test the characteristics of the material of rake teeth, during which the aggressiveness of the bend was modified. An experiment under real-world conditions, i.e. a field experiment, was conducted to examine the results of laboratory experiments.
Keywords:
product design, blueberry harvester, picking reel, rake teeth, plastic deformation
Allikas: Agraarteadus 2012 (23) 1:21-26

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http://agrt.emu.ee/pdf/2012_2_olt.pdf
 
9. A. Bender.  
  Varase punase ristiku (Trifolium pratense L.), hulgilehise lupiini (Lupinus polyphyllus Lind.) ja inkarnaatristiku (Trifolium incarnatum L.) väetusväärtus haljasväetiskultuurina kasvatamisel  (107)
Agraarteadus 2012 * XXIII * 1.
3-11
 
Abstract
Summary of trial results of reed canarygrass (Phalaris arundinacea L.) seed production that were conducted at Jõgeva
A. Bender
In 2008–2011, field trials were carried out at the Jõgeva Plant Breeding Institute in order to identify the possibilities of using the early red clover cultivar ‘Jõgeva 433’, Washington lupin with Jõgeva breeding number 4 and crimson clover of Italian origin as green manure. The fertilization value of the above species was studied after autumn ploughing in the year of sowing and on the second year from sowing, based on the yield and grain quality of spring wheat ‘Vinjett’ and barley ‘Inari’. The in-ploughed biomass as well as its composition were recorded. By the time of ploughing Washington lupin has produced the most abundant biomass. Of the studied species crimson clover had the lowest fertilization value, the stubble and roots of seed plants that were ploughed in resulted only in 6–7% of extra yield of spring wheat in the following year. Crimson clover had no fertilizing aftereffect in the second year. The fertilization values of red clover and Washington lupin were more or less equal. Their statistically significant positive effect on the increase of yield of spring wheat and barley lasted for 3 years, on the quality of grain for 2 years. Red clover that was ploughed into the ground in the year of sowing gave the maximum extra yield of 27% in spring wheat comparedwith o N 0 variant, and Washington lupin 23%, respectively. In the second year of aftereffect Washington lupin gave in barley an extra yield of 26.8%, red clover 10.1%, and in the third year 10.4 and 12.1%, respectively. Green manure increased the contents of crude protein and gluten in spring wheat and that of crude protein in barley.
The fertilization value of all studied species was higher in the case they were sown without a cover crop.
Keywords:
Trifolium pratense L., Lupinus polyphyllus Lind., Trifolium incarnatum L., green manure, spring wheat, barley, yield, quality
Allikas: Agraarteadus 2012 (23) 1:3-11

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http://agrt.emu.ee/pdf/2012_1_bender.pdf
 
10. K. Hiiesaar, V. Eremeev, L. Metspalu, E. Kruus, A. Luik  
  Kartulimardika (Leptinotarsa decemlineata Say) fenoloogia ning lokaalse asurkonna kujunemine aastatel 2008–2013 Eerika katsepõllul (103)
Agraarteadus 2014 * XXV * 1.
17-22
 
Abstract
Phenology and formation of local population of Colorado potato beetles in 2008–2013 (Leptinotarsa decemlineata Say)
K. Hiiesaar, V. Eremeev, L. Metspalu, E. Kruus, A. Luik
In the long term five field crop rotation experiments of organic and conventional growing systems on potato plots the phenology and formation of local-population of Colorado potato beetles were monitored from 2008 to 2013. The beetles started to colonize the field from the establishment of the experiment. The initial population density of beetles was low in both, conventional and organic plots because various cereals and rape had been cultivated on the field and in the vicinity for many years previously. The number of beetles and damage level increased year after year because the potato field remained at the same block, the suitable overwintering places were nearby and the winter mortality was low. As a result of coincidence of several favourable factors like constantly high temperatures, optimal precipitation and availability of fresh food until the late autumn, the second generation of beetles developed in 2010 in Estonia for the first time. This year the number of pest increased sharply when the summer beetle’s offspring reach the adult stage and started to reproduce. The unprotected plots were entirely defoliated, in the conventional plots application of Fastac 50 killed the larvae and therefore the plants had less damage. As the spraying did not destroy the adults and the eggs, the new larvae hatched soon. Early spring and warm summer promoted fast emergence of beetles and enabled development of two generation also in 2013 for the second time. During the observation period the numerous vital local Colorado potato beetles population has been developed in this area. This was facilitated by the neighbouring position of organic and conventional plots as the organic plot acted as a reservoir of the pest and the conventional plot as a food reserve.
Keywords: generation, degree day, conventional, organic, mass of beetles, population density, potato plots, precipitatio
Allikas: Agraarteadus 2014 (25) 1:17-22

Prindi

OTSELINK
http://agrt.emu.ee/pdf/2014_1_hiiesaar.pdf
AUTORI KONTAKT
Eesti Maaülikool, Põllumajandus- ja keskkonnainstituut
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Märksõnade pilv
2008–2013 allikas animal april arundinacea barley based beetles bender breeding cake canarygrass changes clover colorado competitiveness conducted content conventional cows crimson crop dairy degradability degradation design during eesti effect experiment experiments export extra farms fertilization field food generation green harvested harvester heat heating high important increase increased industry jõgeva lassen leached less level local luik lupin mail manure market markets material medicine milk nitrogen order organic parasites period phalaris picking plots ploughed population potato production productivity properties protein quality rake rapeseed rate reed reel ruminal samples second sector seed seeding soil soils sowing spacing species spring started status stubble studied studies teeth temperature treatment trial trifolium value veterinary washington wheat xxiv year years yield 2012


 

Viimati muudetud: 16. 01. 2017, 08:44

VÄLJAANDJA

APS

Akadeemiline Põllumajanduse Selts

Peatoimetaja

Alo Tänavots

Aadress

Fr. R. Kreutzwaldi 1,
51014 Tartu,
Estonia

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TOETAJAD

INFO

p-ISSN
1024-0845
e-ISSN
2228-4893

Agronoomia
1921-1944

Taasasutatud
AGRAARTEADUS 1990

Veebis alates
1997 * VIII * 4

Indekseeritakse
AGRIS, AGRICOLA, CABI, CABI Full Text, DOAJ, EBSCO

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