利用体外产气法研究异位酸对山羊瘤胃发酵的影响  

A Study of the Effect of Isoacids on Fermentation in Goat Rumen by In-Vitro Gas Production

作　　者：赵胜军[1] 龙际飞[2] 任莹[2] 王春维[2] 

机构地区：[1]动物营养与饲料科学湖北省重点实验室养,湖北武汉430023 [2]武汉工业学院饲料科学系,湖北武汉430023

出　　处：《粮食与饲料工业》2007年第8期32-33,共2页Cereal & Feed Industry

摘　　要：应用体外产气法模拟瘤胃发酵,通过测定24 h体外累计产气量、中性洗涤纤维（NDF）的降解率和细菌氮含量,研究添加不同水平异位酸对山羊瘤胃发酵的影响.试验采用单因子设计,异位酸的添加水平分别为0%、0.1%、0.2%、0.4%和0.6%,每个水平4个重复.结果表明,与对照组相比,添加0.2%和0.4%水平的异位酸组能显著提高24 h累计产气量（P＜0.05）;NDF降解率显著提高（P＜0.05）,其中以0.2%水平的异位酸组NDF降解率最高（P＜0.01）;细菌氮含量差异极显著提高（P＜0.01）,其中以0.4%水平的异位酸组细菌氮含量最高（P＜0.01）.日粮中的异位酸的适宜添加水平为0.2%～0.4%.By simulating the in-vitro gas production and through detecting the in-vitro accumulative gas production （ GP ） , degradation rate of neutral detergent fiber （ NDF ） and content of bacteria nitrogen for 24 hours, and the effect of different levels of isoacids on fermentation in goat rumen was studied. A single factorial trial was designed for the experiment. Isoacids was added at levels of 0, 0.1%, 0.2%, 0.4% and 0.6% respectively, and each level included 4 repetitions. The results indicated that compared with the control, the adding level of 0.2% and 0.4% isoacids could increase the GP significantly （ P 〈 0.05 ） ; the degradation of NDF was increased significantly （ P 〈 0.05 ） , of which the degradation of NDF in the group of 0.2% isoacids was the highest （ P 〈 0.01 ） ; the difference of bacteria nitrogen content was increased extremely significantly （ P 〈 0.01 ） , of which the level of 0.4% isoacids increased the bacteria nitrogen mostly （ P 〈0.01 ）. The ideal level of isoacids added to rations was 0.2% -0.4%.

关 键 词：体外产气法 异位酸 山羊 瘤胃发酵 

分 类 号：S827[农业科学—畜牧学] S816.6[农业科学—畜牧兽医]