The effect of pre-grazing herbage mass on milk production and of dairy cows in mid-lactation

摘要：

Grazed grass is the cheapest feed available.As feed costs continue to rise,increasing the proportion of grass in the diet of the dairy cows is now a major objective in grazing dairy systems.A number of sward factors including herbage mass have been shown to influence the rate of herbage intake and milk production in grazing animals.Stakelum (1986) reported increased intake as herbage mass increased.In contrast,Hoogendoorn (1992) reported the rate of intake is more closely related to green leaf mass than sward height,resulting in increased milk production when cows grazed low pre‐grazing HM swards.The objective of this experiment was to investigate the effect of a high and low pre‐grazing herbage mass ( HM ) on mid‐lactation milk production of spring calving dairy cows offered two levels of daily herbage allowance (DHA).

关键词： dairy cow milk production herbage allowance herbage mass

作者: M.McEvoy M.O Donovan T.M.Boland L.Delaby

作者单位: Dairy Production Research Centre,Teagasc,Moorep ark,Fermoy,Co.Cork,Ireland;School of Agriculture,Foo Dairy Production Research Centre,Teagasc,Moorep ark,Fermoy,Co.Cork,Ireland School of Agriculture,Food Science and Veterinary Medicine,UCD,Belfield,Dublin 4,Ireland INRA,UMR Production du Lait,35590,St Gilles,France

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）