不同蛋白质组成的日粮对瘤胃发酵及微生物蛋白合成的影响

本试验选用4只体况良好、体重(30.0±2.5) kg的山羊, 安装瘤胃瘘管,按4×4拉丁方试验设计，研究4种不同蛋白质豆粕（A组）、棉粕（B组）、菜粕（C组）和DDGS（D组）组成的日粮对山羊瘤胃发酵及微生物蛋白合成的影响。研究结果表明，各组瘤胃液pH无显著差异（P>0.05）；A组的氨氮（NH₃-N）浓度显著高于D组（P<0.05）；A组的微生物蛋白（MCP）浓度显著高于B、C组（P<0.05），极显著高于D组（P<0.01）；各组乙酸、丙酸、丁酸浓度差异显著，总VFA浓度A、B组显著高于C、D组（P<0.05）

Effect of Different Protein Dietary on Goat Rumen Fermentation and the Synthesis of Microprotein

The objective of this experiment was to research the effects of four different protein dietary A, B, C and D, which were soybean meal, cottonseed meal, rapeseed meal and DDGS respectively on rumen fermentation and the synthesis of microprotein. Treatments were arranged as a 4×4 Latin square design, and four goats (30±2.5) kg fitted with permanent ruminal cannulaes. The results indicated that there was not significant difference among four groups on rumen pH (P>0.05); the NH3-N concentration of group A was higher significantly than that of group D (P<0.05). There was significant difference among four groups on the yield of MCP, the yield of group A is highest, it is higher significantly than that of groups B and C (P<0.05), and higher significantly than that of group D (P<0.01). There was significant difference among four groups on acetic acid, propionate acid, butyric acid concentration, and total VFA concentration of groups A and B were higher than groups C and D (P<0.05).