The effects of lucerne hay particle size on chewing activity and rumen fermentation in dry cows

被引：0
|
作者：
Sun, T. [1 ]
Li, S. L. [1 ]
He, M. [1 ]
Cao, Z. J. [1 ]
机构：
[1] China Agr Univ, Coll Anim Sci & Technol, Natl Key Lab Anim Nutr, Beijing 100094, Peoples R China
来源：
JOURNAL OF ANIMAL AND FEED SCIENCES | 2007年 / 16卷
关键词：
lucerne hay; chop length; chewing behaviour; rumen; dry cows;
D O I：
10.22358/jafs/74501/2007
中图分类号：
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号：
0905 ;
摘要：
Three cannulated, multiparous dry cows were randomly assigned to a 3x3 Latin square experiment to evaluate the effects of different lucerne hay particle size on eating behaviour, chewing activity, and rumen fermentation based on measurements of the Penn State Particle Separator. During each of the 21-d periods, animals were offered one of three total mixed rations, which were chemically identical but included lucerne hay of different length (2, 4, 8 cm). Results showed that increasing lucerne hay particle size decreased intake of DM and NDF, increased chewing activities, rumen pH and ammonia concentration, and decreased the concentration of VFA.
引用
收藏
页码：249 / 254
页数：6
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