杂交狼尾草青贮饲喂肉猪效果研究

摘要

This study investigated silage quality and its feeding effect on market pigs by adding enzymes prepa-rations to hybrid Pennisetum silage.150 Duroc-Landrace-Yorkshire pigs (100 days old,50 kg body weight) were divided into five groups (a control group and four experimental groups I-IV).Each group had three rep-licates of 10 pigs.Pigs in the control group were fed only a basal diet,while pigs in the experimental groups were fed as follows:(1 )I was fed basal diet+wheat bran+hybrid Pennisetum silage;(2)Ⅱ was fed basal diet+wheat bran+hybrid Pennisetum silage treated by cellulose;(3)Ⅲ was fed basal diet+wheat bran+hy-brid Pennisetum silage treated by cellulose bacterium fluid;and (4)Ⅳ was fed basal diet+wheat bran+hybrid Pennisetum silage treated by Lactobacillus .The results revealed no significant differences between the control and four experimental groups in average daily weight gain.However,the experimental groups I,Ⅱ,Ⅲ and Ⅳ showed respectively 2.3%,8.6%,4.4% and 2.2% higher absolute average daily gains than the control group. The concentrated feed conversion ratios were respectively 9.7%,14.9%,11.4% and 9.5% less in the four ex-perimental groups compared with the control,which accounted for economic benefit increases in the order of 11.3%,36.0%,21.6% and 14.0% respectively.Results also indicated that feeding silage can reduce the length and weight of the small intestine,while increasing back fat thickness,meat color,and the weight of flare fat and stomach,and having no effect on the weight of the large intestine.The results thus indicate that cellulose-decomposing micro-organisms can improve silage quality,with the increased feeding value for pigs bringing economic benefits.%本试验旨在研究利用酶制剂青贮杂交狼尾草，对牧草品质和肉猪饲喂效果的影响。选用150头100日龄体重50 kg 杜长大三元肉猪。实验分5个处理，每个处理3次重复，每个重复10头。对照组（CK）饲喂基础日粮；处理Ⅰ饲喂基础日粮，同时饲喂添加麦麸的杂交狼尾草青贮料；处理Ⅱ饲喂基础日粮，同时饲喂添加麦麸和纤维素酶青贮的杂交狼尾草青贮料；处理Ⅲ饲喂基础日粮，同时饲喂添加麦麸和纤维素菌液青贮的杂交狼尾草青贮料；处理Ⅳ饲喂基础日粮，同时饲喂添加麦麸和乳酸菌青贮的杂交狼尾草青贮料。结果表明，处理Ⅰ、Ⅱ、Ⅲ、Ⅳ与 CK 相比平均日增重差异不显著（P ＞0．05），但平均日增重绝对值分别比 CK 提高了2．3％，8．6％，4．4％和2．2％，精料肉比分别降低了9．7％，14．9％，11．4％和9．5％，经济效益分别提高了11．34％，36．03％，21．60％和14．03％。4组饲喂杂交狼尾草青贮料的肉猪与 CK 相比会适当降低肉猪屠宰率，显著提高肉猪的背膘厚，肉猪的板油重、胃重呈增加的趋势，大肠重量差异不显著，小肠重量和长度则变短变轻，且增加肉质颜色等品质。说明利用纤维素降解菌可以提高牧草青贮品质，提高肉猪饲喂效果和经济效益。