Effect of potato pulp silage on urea nitrogen content in serum and fecal nitrogen excretion by lactating cows grazed on artificial temperate pasture

摘要：

High urea nitrogen contents of serum and milk are often shown in lactating cows grazed on artificial temperate pasture,because of high degradable protein intake from the pasture.The high urea nitrogen contents cause declines of protein and energy utilization efficiencies by the cows.Urea nitrogen contents of serum and milk in grazing cows fed potato pulp silage were lower than the cows fed rolled corn as energy supplements ( Hanada et al.,2005).The decreases of the urea nitrogen contents were probably due to decrease of non‐protein nitrogen absorption from lower intestine since ammonium nitrogen concentration in the rumen was not affected by the supplements.The objective of this trial was to investigate the effect of potato pulp silage on urea nitrogen contents in milk and serum,and fecal nitrogen output of grazing cows.

关键词： grazing cows fecal nitrogen potato pulp silage

作者: Masaaki Hanada Hiroyuki Sasada Kazutaka Hamabe Masahito Kawai Meiji Okamoto

作者单位: Obihiro University of Agriculture and Veterinary Medicine Inada Obihiro Hokkaido,080-8555,Japan

会议类型: 国际会议

会议名称: 2008世界草地与草原大会

会议地点: 呼和浩特

会议语种:英文

在线出版日期: 2008-06-29（万方平台首次上网日期，不代表论文的发表时间）