异戊酸对西门塔尔牛瘤胃发酵的影响

›› 2007, Vol. 34 ›› Issue (2): 23-25.

异戊酸对西门塔尔牛瘤胃发酵的影响

段玉，刘强，黄应祥，王聪，王浩，郭刚

山西农业大学动物科技学院，太谷 030801

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-02-20 发布日期:2007-02-20

Effects of Isovalerate on Rumen Fermentation in Simmental Steer

DUAN Yu,LIU Qiang,HUANG Yingxiang, WANG Cong,WANG Hao,GUO Gang 

College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, China

Received:1900-01-01 Revised:1900-01-01 Online:2007-02-20 Published:2007-02-20

摘要/Abstract

摘要： 选用4头体重420 kg，年龄2.5岁装有永久性瘤胃瘘管的中国西门塔尔牛阉牛，采用4×4拉丁方设计，以混合精料和玉米秸秆为基础日粮，研究异戊酸（0、0.02、0.04和0.06 g/kg体重）对瘤胃pH、氨态氮、挥发性脂肪酸浓度及乙酸/丙酸比例的影响。结果表明：0.06 g/kg体重组显著降低瘤胃pH（P<0.05），饲喂后3~6 h 0.04 g/kg体重组和0.06 g/kg体重组NH3-N浓度显著低于对照组和0.02 g/kg体重组（P<0.05）；0.04 g/kg体重组瘤胃乙酸、丁酸和总挥发性脂肪酸浓度显著增加（P<0.05），乙酸/丙酸比例显著提高（P<0.05）。异戊酸的适宜添加水平为0.04 g/kg体重。

关键词: 中国西门塔尔牛; 异戊酸; 瘤胃发酵

Abstract: Four Simmental steers(average BW 420 kg, aged 2.5) with permanent rumen cannula and consuming a corn straw diet were used in a 4×4 Latin square design and supplemented with four levels(0, 0.02, 0.04 and 0.06g/kgW) of supplemental isovalerate to evaluate the effects of isovalerate on ruminal pH, NH3-N, and VFA. The results showed that ruminal pH of supplemental isovalerate 0.06 g/kgW decreased (P<0.05). The NH3-N concentrations of 0.04 g/kgW and 0.06 g/kgW group were lower than control and 0.02 g/kgW group significantly (P<0.05). Ruminal actate, butyrate, acetate/propionate, TVFA, and purine derivatives of urine were increased significantly (P<0.05) by isovalerate supplementation with 0.04 g/kgW. The supplementation of isovalerate had passive effect on rumen fermentation, the optimum dose was 0.04g/kgW.

Key words: simmental steer; isovalerate; rumen fermentation

中图分类号:

S823.5

段玉;刘强;黄应祥;王聪;王浩;郭刚. 异戊酸对西门塔尔牛瘤胃发酵的影响[J]. , 2007, 34(2): 23-25.

DUAN Yu;LIU Qiang;HUANG Yingxiang;WANG Cong;WANG Hao;GUO Gang . Effects of Isovalerate on Rumen Fermentation in Simmental Steer [J]. China Animal Husbandry & Veterinary Medicine, 2007, 34(2): 23-25.

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