小麦型日粮中添加木聚糖酶对藏羊屠宰性能、养分消化率和血清生化指标的影响  

Effects of Xylanase Supplementation in Wheat Based Diets on Slaughter Performance,Nutrient Digestibility and Serum Biochemical Indexes of Tibetan Sheep

作　　者：张峰硕 周力 马博妍 高占红 王志有[1] 侯生珍[1] 桂林生 ZHANG Fengshuo;ZHOU Li;MA Boyan;GAO Zhanhong;WANG Zhiyou;HOU Shengzhen;GUI Linsheng(College of Agriculture and Animal Husbandry,Qinghai University,Xining 810016,China;College of Agriculture,Ningxia University,Yinchuan 750021,China)

机构地区：[1]青海大学农牧学院,西宁810016 [2]宁夏大学农学院,银川750021

出　　处：《四川农业大学学报》2023年第4期707-712,共6页Journal of Sichuan Agricultural University

基　　金：青海省科技厅帅才科学家项目(2022NK169);青海省农业农村厅项目(CK216327);青海省羊产业平台项目(CK2134607);青海省林草局项目(K992138);青海大学校地合作项目(2020GN118)。

摘　　要：【目的】旨在研究木聚糖酶对藏羊屠宰性能、养分表观消化率和血清生化指标的影响。【方法】试验选取60只初始体重相近且体况良好的2~3月龄藏羊公羔,随机分为2组,每组设置5个重复,每个重复6只。对照组饲喂不含木聚糖酶的小麦型日粮,试验组饲喂在饲喂小麦型日粮基础上添加0.2%木聚糖酶。整个试验分为预饲期10d和正试期90d。【结果】①与对照组相比,试验组藏羊的宰前活重、胴体重、屠宰率和眼肌面积均无显著差异(P>0.05),试验组藏羊的肝脏、瓣胃和皱胃的重量显著高于对照组(P<0.05)。②试验组营养物质消化率中粗灰分、中性洗涤纤维和酸性洗涤纤维的消化率显著高于对照组(P<0.05)。③试验组血清中葡萄糖含量显著高于对照组(P<0.05)。【结论】在日粮中添加0.2%木聚糖酶对藏羊屠宰性能没有不良影响,但可以有效抑制小麦粉中的抗营养因子提高藏羊的营养物质表观消化率,使日粮在瘤胃、皱胃等中提高消化速率刺激脏器发育;而血清生化指标均在正常范围内,未产生负面影响。【Objective】This experiment was conducted to study the effects of xylanase on slaughter performance,apparent digestibility of nutrients and serum biochemical indexes of Tibetan sheep.【Method】Sixty 2-3 month-old Tibetan ram lambs with similar initial weight and good physical condition were selected and randomly divided into two groups.Each group was set with 5 replicates,6 animals for each replicate.The control group was fed with a wheat-based diet without xylanase,while the test group was fed with a wheat-based diet supplemented with 0.2%xylanase.The whole experiment was divided into a pre-feeding period of 10 days and a trial period of 90 days.【Result】①Compared with the control group,there was no significant difference in slaughter weight,carcass weight,slaughter rate and eye muscle area in the experimental group(P>0.05).The weight of liver,omasum and abomasum in the experimental group was significantly higher than that in the control group(P<0.05).②The digestibility of crude ash,neutral detergent fiber and acid detergent fiber in the test group was significantly higher than that in the control group(P<0.05).③The glucose content in serum of the test group was significantly higher than that in the control group(P<0.05).【Conclusion】The addition of 0.2%xylanase to the diet had no adverse effect on the slaughter performance of Tibetan sheep,but it could effectively inhibit the anti-nutritional factors in wheat flour to improve the apparent digestibility of nutrients in Tibetan sheep and make the diet improve the digestive rate in rumen and abomasum to stimulate the organ development.While all serum biochemical indexes were within the normal range without negative effects.

关 键 词：木聚糖酶 藏羊 屠宰性能 消化率 血清生化指标 小麦 器官发育 

分 类 号：S826[农业科学—畜牧学]