菌制剂和酶制剂处理小麦秸秆对肉用绵羊生长性能和屠宰性能的影响

本试验旨在研究菌、酶复合青贮制剂和复合酶制剂处理的小麦秸秆对肉用绵羊生长性能和屠宰性能的影响，探索有效的小麦秸秆生物制剂处理方法。采用单因素试验设计，选取80只体重为（24.00±2.42）kg的杜泊羊×小尾寒羊杂交F1代公羔羊，随机分为4个处理，即空白对照组（干小麦秸秆）、处理组Ⅰ（小麦秸秆喷洒菌、酶复合青贮制剂发酵）、处理组Ⅱ（干小麦秸秆喷洒复合酶制剂）、羊草对照组（羊草），每个处理5个重复，每个重复4只。预饲期8 d，正试期为60 d。结果显示，处理组Ⅰ、Ⅱ和羊草组羔羊净增重和平均日增重均显著高于对照组（P< 0.05），料重比均显著低于对照组（P< 0.05），而3组间差异均不显著（P> 0.05）；不同处理组间屠宰性能无显著差异（P> 0.05）；处理组Ⅰ、Ⅱ和羊草对照组试验羊肝脏重分别较对照组高10.74%（P> 0.05）、13.79%（P< 0.05）、8.52%（P> 0.05），且3组中肝脏重量占宰前活重的比例均显著高于对照组（P< 0.05），其余指标（瘤胃、网胃、瓣胃、皱胃、小肠和大肠、肾脏、肺脏、头、蹄和毛+皮）的重量及其占宰前活重的比例在各组间均无显著差异（P> 0.05）。综上所述，用菌、酶复合青贮剂和复合酶制剂处理小麦秸秆对肉羊生长性能具有显著的改善作用，对于屠宰率和各组织器官的发育无显著影响，接近羊草的饲喂效果。

Effects of Bacteria and Enzyme Treatments of Wheat Straw on Growth Performance and Slaughter Performance of Mutton Sheep

In order to find the way to effectively utilize wheat straw,the effect of bacteria and enzyme treatments of wheat straw on growth performance and slaughter performance were studied.80 Dorper×Small-tailed Han crossbred male lambs with initial body weight of (24.00±2.42) kg were randomly divided into four groups with five replicates per group and four lambs per replicete, which were control group (dry wheat straw),treatment group Ⅰ (wheat straw with bacteria and enzyme compound preparations),treatment group Ⅱ (dry wheat straw with enzyme preparations),and Chinese wildrye group (Chinese wildrye).The experiment lasted for 60 d with 8 d of adaptation period.The results showed that the net gain and average daily gain of treatment groups Ⅰ,Ⅱ and Chinese wildrye group were significantly higher than those in control group (P< 0.05),and F/G were significantly lower than control group (P< 0.05),but those in the three groups were not significantly difference (P> 0.05);There were no significant differences of slaughter performance among different groups (P> 0.05).Compared with control group,the liver weight in the treatment groups Ⅰ,Ⅱ and Chinese wildrye group were increased 10.74% (P> 0.05),13.79% (P< 0.05),8.52% (P> 0.05), and the percentages of liver weight to live weight before slaughter were significantly higher than that in control group (P< 0.05).The other indexes of issues and internal organ (rumen,reticulum,omasum,abomasum,small intestine,large intestine,lung,kidney,head,feet and skin+wool) showed no significant difference (P> 0.05).The growth performance of sheep were significantly increased by wheat straw with bacteria and enzyme treating,while the slaughter performance and development of tissues and organs were not significantly affected. The nutrient value of wheat straw with biological treatment was close to Chinese wildrye.