Effect of particle size of lucerne hay on chewing activity, digestion and energy balance of Chinese Holstein heifers
Three 8-month-old Chinese Holstein heifers weighing 300 ± 22.4 kg were selected for a 3 × 3 Latin square design to study the effects of chopped length of lucerne hay (2,4 cm, and natural length) on chewing activity and feed utilization efficiency. Results showed that increasing the chopped length of lucerne hay increased eating bout, time spent for eating hay, concentrate and ration, ruminating and total chewing activity. Digestibility was unaffected by the treatments. Decreasing chopped length of lucerne hay decreased heat production and increased energy retained in body.
lucerne hay chopped length chewing activity energy metabolism digestibility heifers
Q.B.Kong X.M.Zhang F.Mo S.L.Li M.Ma
College of Animal Science and Technology, China Agriculture University Yuanmingyuan West Road 2, Beijing 100094, P.R.China
国际会议
The 7tb International Symposium on the Nutrition of Herbivores(ISNH-7)(第七届国际草食动物营养研讨会)
北京
英文
790-795
2007-09-16（万方平台首次上网日期，不代表论文的发表时间）