日粮中添加玉米油对肉牛瘤胃发酵的影响  

Effects of Corn Oil on the Rumen Fermentation in Cattle

作　　者：李凤学[1] 赵广永[2] 杨雅芳[2] 

机构地区：[1]张家口农业高等专科学校,河北张家口075131 [2]中国农业大学动物科技学院,北京100094

出　　处：《中国畜牧杂志》2001年第1期16-17,共2页Chinese Journal of Animal Science

基　　金：国家自然科学基金项目!批准号 3940 0 0 94

摘　　要：3头装有瘤胃瘘管的成年杂种牛 ,按 3× 3拉丁方试验设计 ,饲以添加 0 %、4 %和 8%玉米油的稻草和精料混合料 ( 2 1 )日粮。在饲喂后 2、4、6、8h采集瘤胃液样品 ,分别测定瘤胃液pH值、NH3-N和VFA浓度。结果表明 ,添加 4 %和 8%玉米油对瘤胃液pH值、NH3-N浓度没有显著影响 (P >0 .0 5) ;添加玉米油 4 %对瘤胃总VFA浓度没有显著影响 (P >0 .0 5) ,但添加 8%玉米油使瘤胃总VFA和乙酸浓度显著下降 (P <0 .0 5)。添加 8%以下的玉米油对丙酸、丁酸浓度没有影响 (P >0 .0 5) ,结果使乙酸 /丙酸比值从 3.75分别下降到 3.2 6和 3.1 4 (P <0 .0 5)。Three adult hybrid cattle fitted with rumen cannulas in a 3×3 Latin square design, were fed with diets based on rice straw and mixed concentrates (2:1) and added with 0%,4%or8%corn oil. The rumen fluid samples were collected in 2,4,6 and 8 h after morning feeding. Rumen pH was measured, and NH 3-N and VFA were determined. The results show that addition of 4% or 8% corn oil did not influence the rumen pH and NH 3-N concentration (P>0.05). Addition of 4% corn oil did not influence VFA (P>0.05), but 8% corn oil significantly decreased the total VFA and acetic acid concentration, respectively (P<0.05). The addition of less than 8% corn oil did not influence the propionic concentration and butyric acid concentration (P>0.05). Addition of 4% and 8% corn oil significantly decreased the ratio of acetic to propionic acid from 3.75 to 3.26 and 3.14, respectively (P<0.05).

关 键 词：玉米油 瘤胃发酵 肉牛 日粮脂肪含量 

分 类 号：S823.92[农业科学—畜牧学] S823.5[农业科学—畜牧兽医]