全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:Mehdi Barzegari , Ali Reza Sepaskhah , Seyed Hamid Ahmadi
来源:[J].Nutrient Cycling in Agroecosystems(IF 1.416), 2017, Vol.108 (2), pp.211-230Springer
摘要:Irrigation water and nitrogen (N) are the limiting factors for crop production in arid and semi-arid areas. However, excess irrigation and N application rate is a source of groundwater contamination. Partial root drying irrigation (PRD) is the water-saving technique and would pe...
作者:L. Fadul-Pacheco , D. Pellerin , P.Y. Chouinard ...
来源:[J].Journal of Dairy Science(IF 2.566), 2017, Vol.100 (8), pp.6592-6601Elsevier
摘要:ABSTRACT(#br)Nitrogen efficiency (milk N/dietary N; NE) can be used as a tool for the nutritional, economic, and environmental management of dairy farms. The aim of this study was to identify the characteristics of herds with varying NE and assess the effect on farm profitabil...
作者:Elisabet Nadeau , Jan-Eric Englund , Anders H. Gustafsson
来源:[J].Livestock Science(IF 1.249), 2006, Vol.111 (1), pp.45-56Elsevier
摘要:Abstract(#br)The aim of this study, which was part of the EU-financed project Life Ammonia, was to evaluate the effects of dietary components and milk production on nitrogen efficiency of dairy cows. The study included examining the effects of decreased crude protein (CP) concent...
作者:M. Savari , M. Khorvash , H. Amanlou ...
来源:[J].Journal of Dairy Science(IF 2.566), 2018, Vol.101 (2), pp.1111-1122Elsevier
摘要:ABSTRACT(#br)This study was conducted to investigate the effects of the ratio of rumen-degradable protein (RDP) to rumen-undegradable protein (RUP) and corn processing method on production performance, nitrogen (N) efficiency, and feeding behavior of high-producing Holstein ...
作者:M. Focant , E. Froidmont , Q. Archambeau ...
来源:[J].Journal of Dairy Science(IF 2.566), 2019, Vol.102 (2), pp.1144-1159Elsevier
摘要:ABSTRACT(#br)The objective of this study was to test the effects of inclusion of hop pellets (HP) and oak tannin extracts (OT) alone or in combination on N efficiency, methane (CH 4 ) emission, and milk production and composition in 2 experiments with dairy cows fed low-N rat...
作者:O. Godinot , M. Carof , F. Vertès ...
来源:[J].Agricultural Systems(IF 2.504), 2014, Vol.127, pp.41-52Elsevier
摘要:Abstract(#br)Reactive nitrogen (N) flows (all forms of N except N 2 ) are greatly increasing worldwide. This is mainly due to the ever larger use of inorganic N fertilizers used to sustain the growing food production. N flows have major impacts on water, air and soil quality as w...
作者:H.N. Phuong , N.C. Friggens , I.J.M. de Boer ...
来源:[J].Journal of Dairy Science(IF 2.566), 2013, Vol.96 (11), pp.7245-7259Elsevier
摘要:Abstract(#br)A meta-analysis was performed to explore the correlation between energy and nitrogen efficiency of dairy cows, and to study nutritional and animal factors that influence these efficiencies, as well as their relationship. Treatment mean values were extracted from 68 p...
作者:Zhen-Hua Zhang , Hai-Xing Song , Qiang Liu ...
来源:[J].Journal of Plant Nutrition(IF 0.526), 2010, Vol.33 (10), pp.1448-1459Taylor & Francis
摘要:Differences of nitrogen efficiency of oilseed rape ( Brassica napus L.) cultivars and their physiological properties were studied in a pot experiment, and the ratio of seed yield with no nitrogen supplied to that with normal nitrogen supply was adopted as a nitrogen efficiency co...
作者:Muhammad Imran , Talat Naseer Pasha , Muhammad Qamer Shahid ...
来源:[J].Asian-Australasian Journal of Animal Sciences(IF 0.643), 2017, Vol.30 (5), pp.660-665DOAJ
摘要:Objective The objective of the study was to determine the effects of increasing levels of metabolizable protein (MP) on lactation performance and nitrogen (N) efficiencies in lactating dairy cows. Methods Nine multiparous cows in mid lactation [113±25 days in milk] received...
作者:S.I. Arriola Apelo , A.L. Bell , K. Estes ...
来源:[J].Journal of Dairy Science(IF 2.566), 2014, Vol.97 (9), pp.5688-5699Elsevier
摘要:... Reductions in environmental N release could be attained through an improvement in N efficiency. The objective of this study was to determine if the predicted reduction in milk yield associated with feeding a low-protein diet to lactating dairy cows could be avoided by dieta...

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