Urinary‐nitrogen output by dairy cows in conventional and organic grazing systems

摘要：

Urine from cows grazing pastures with high crude protein (CP) concentrations is the major source of nitrogen (N) leached in drainage water from New Zealand dairy farms.Organic dairy systems,using limited fertiliser N and supplements,are considered more environmentally friendly.This paper provides measurements and predictions of N leaching losses in a farmlet study,comparing conventional and organic dairy systems.

关键词： organic dairying urine output nitrogen losses pasture feeding

作者: I.M.Brookes D.J.Horne A.R.Thatcher

作者单位: College of Sciences,Massey University,Private Bag 11-222,Palmerston North,New Zealand.

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）