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放牧对高寒草甸植物群落结构及生产力的影响 被引量:68
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作者 仁青吉 崔现亮 赵彬彬 《草业学报》 CSCD 2008年第6期134-140,共7页
草地的退化是当前畜牧生产面临的一个主要问题,本试验选取青藏高原高寒草地自然群落中等放牧强度和不放牧2个梯度进行对比研究,探讨当前的普遍放牧强度对群落生产力、不同功能群产量分配和群落结构的影响。结果表明,3年中放牧使群落总... 草地的退化是当前畜牧生产面临的一个主要问题,本试验选取青藏高原高寒草地自然群落中等放牧强度和不放牧2个梯度进行对比研究,探讨当前的普遍放牧强度对群落生产力、不同功能群产量分配和群落结构的影响。结果表明,3年中放牧使群落总体生产力下降,其中不同功能群所占比例也有所变化,禾草和莎草比例由平均76.6%下降到57.4%,杂草、豆科和毒草的比例上升;群落高度降低,平均最大高度由46.8 cm下降到22.4 cm;物种多样性和多度增加,多样性由单位样方平均26.5种增加到30.9种,多度由单位样方215.7株增加到304.6株;总盖度并没有明显差异,禾草和莎草盖度减小,杂草盖度增加,群落结构由垂直分层为主演化为水平生态位分化为主。3年中放牧的影响没有显示出草地的进一步退化趋势。 展开更多
关键词 放牧 高寒草甸 群落结构 牛产力 功能群
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Effect of Cowshed Design and Cooling Strategy on Welfare and Productivity of Dairy Cows 被引量:2
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作者 M. Samer 《Journal of Agricultural Science and Technology(A)》 2011年第6期848-857,共10页
Nine cowsheds were used, the differences between each cowshed are orientation (east-west or north-south), cooling (with or without), and height (3 m, 5 m or 8 m height). Dry-bulb temperature, relative humidity, ... Nine cowsheds were used, the differences between each cowshed are orientation (east-west or north-south), cooling (with or without), and height (3 m, 5 m or 8 m height). Dry-bulb temperature, relative humidity, dew point, shaded area, air velocity, and maximum temperature were measured beneath each shed. The temperature-humidity index (THI) and the shading efficiency were calculated for each cowshed. The trials were conducted using 180 lactating Holstein Friesian cows; twenty cows housed beneath each shade structure. Measurements performed on cows were respiration rate, skin temperature, and rectal temperature; moreover, the milk produced by each cow was recorded, and the feed intake. High air velocities were recorded under high shade structures which enhance the aeration; consequently, maximum temperatures, and THI recorded beneath high sheds were less than those recorded beneath low sheds; also, skin temperatures, and respiration rates for cows housed under high sheds were less than those measured for animals housed under low sheds(differences were found to be significant). Thereby, increasing shed height enhances dairy cows' microclimate under Egyptian conditions (hot climate); consequently, the milk production increases. The best orientation is the east-west orientation, which is preferable for hot climates. The exploitation of cooling has significant effect on microclimate, cooling enhances the ambient environment and provides comfortable zone for dairy cows within which cows reach high production levels. 展开更多
关键词 Open housing system heat stress shade structure cooling strategy animal welfare.
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The Strategies of Grassland Management in Farms of Northeastern Part of Poland
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作者 Jankowski Kazimierz Kolczarek Roman Jankowska Jolanta Sosnowski Jacek 《Journal of Life Sciences》 2013年第7期727-731,共5页
Four directions for grassland management are set out under the Common Agricultural Policy: the existing, environmental, productional and integrated. The aim of this work is to demonstrate the agreement of production ... Four directions for grassland management are set out under the Common Agricultural Policy: the existing, environmental, productional and integrated. The aim of this work is to demonstrate the agreement of production potential of grassland with the strategy of the CAP on the background of commodity milk production. This work is connected with randomly selected 1656 farms from the north-eastern part of the Lublin province remaining the dairy cattle. Source material for analysis was derived from the evaluation reports of dairy farms and the datas of Voivodeship Statistical Office. Taken the average annual milk production and surface of permanent grasslands, were divided into three groups of management direction: I- existing, II- integrated, III- productional In a separate II group of this management, three subgroups were identified dependent on the volume of milk production: A-(20-50), B-(50-100), C-(100-350) thousand of liters. In the studied farms the participation of grasslands in the structure of agriculture fanning lands was significantly higher than the average in the region as well as in the country. The largest research group accounted 49.5% of farms producing 20-50 thousand liters of milk with an average area of 21.23 ha and sustained an average of 9.8 cows. Large proportion of permanent grassland in the structure of agricultural lands and large stocking density per 100 ha of grasslands in northeast farms of Lublin province indicate significant intensification of feed production on the farmlands. 展开更多
关键词 Grassland management milk production stocking density.
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How the Organization of Milk Producers in a Network of Companies Improved the Productivity
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作者 Marcelo Tsuguio Okano Oduvaldo Vendrametto Osmildo Sobral dos Santos 《Journal of Agricultural Science and Technology(A)》 2012年第2期228-236,共9页
The present study is the result of an investigation of the organization of milk producers in the region of Fartura, SP, relations between the various actors in this chain of milk, the benefits obtained from this relat... The present study is the result of an investigation of the organization of milk producers in the region of Fartura, SP, relations between the various actors in this chain of milk, the benefits obtained from this relationship and classification of these properties in the dairy chain, allowing to measure productivity through the proposed indicators. Research has shown that dairy farmers in the region of Fartura had several benefits to organizing themselves as a Local Productive Arrangement or Social Networks, especially in relation to a better pay the price of a gallon of milk. To achieve these results, farmers had to invest to improve technological standards and production processes and thereby increase milk quality and productivity. 展开更多
关键词 Agribusiness milk production milk chain dairy cattle.
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Investments of Milk Processing Capacities from Romania, through the Funds Provided by the "NPRD 2014-2020"
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作者 Vladu Marius Panzaru Radu Lucian 《Journal of Agricultural Science and Technology(A)》 2017年第8期577-584,共8页
In this paper, an analysis of the possibilities of development of milk processing activity was made, using as financing source the public funds provided by the Common Agricultural Policy and the distribution of the in... In this paper, an analysis of the possibilities of development of milk processing activity was made, using as financing source the public funds provided by the Common Agricultural Policy and the distribution of the investments in Romania. All the EU member states gain 99.6 billion through the European Agricultural Fund for Rural Development, the period 2014-2020, of which Romania has received the total of 8.128 billion euros. Through the 2014-2020 National Rural Development Program (NRDP 2014-2020), sub-measure 4.2 "Support for investment in processing/marketing of agricultural products" (2014), Romania is falling Regulation (EC) 1305/2013 in measure 4 "Investments in physical assets" (2013) and contributes to increasing the value added of products on local markets and inter-professional organizations, the establishment and development of small businesses and job creation. Until now, in the milk processing sector, investments of 93,918,043 euros were made, about 50% (47,667.41 euros) of which from public funds. 展开更多
关键词 Public funds INVESTMENT PROCESSING milk.
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Comparison the Genetic Potential of Some Growth & Milk Trait, s of Hybrid (Crossed) Saanen with Native Goat (Lori Black Goat) versus Native Goats in Qom Province
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作者 S. M. Hoseini Ghazikhani M. Kalantar 《Journal of Agricultural Science and Technology(A)》 2011年第8期1297-1299,共3页
The performance of some growth and milk traits of selected Qomi native (Lori black) goats and hybrids of saanen with native goats during 2008-2010 was compared. Growth traits include birth weight (BW), one-month w... The performance of some growth and milk traits of selected Qomi native (Lori black) goats and hybrids of saanen with native goats during 2008-2010 was compared. Growth traits include birth weight (BW), one-month weight (1 MW), weaning weight (WW) and 6-month weight (6 MW). Also the milk production traits was monthly milk production on 2, 3, 4, 5th months (quantitative traits) and some milk composition included dry matter (%DM), fat (%F), and protein (%P) percentage on during of production (qualitative traits). There were no significant differences in sex, birth type and genetic group for BW. Also the effect of genetic groups on 1 MW, WW, and 6 MW was significant, while effects of sex and birth type on 1 MW, WW and 6 MW was not significant. Also MW (Mothe's weight) had no significant effect on BW, 1 MW, WW and 6 MW. The average of daily milk records was 0.48 kg for nativel and 1.1 kg for crossed goats. The maximum monthly milk records in two groups were in second month (native: 0.64 -4- 0.05, crossed: 1.44 ~: 0.12) and the minimum were in fifth month (native: 0.36 + 0.03, crossed: 0.77 -4- 0.05). %DM, %F and %P in 5th month were higher than other months in two groups. Effects of genetic groups on milk production and also on average of%F, %DM and %P were significant. This study showed that the crossbreeding has a significant effect on most milk production and growth traits in Iranian native goats. 展开更多
关键词 Saanen goat qomi native goat growth traits milk traits
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