饲料蛋白在陕北白绒山羊小肠的消化率  

Intestinal protein digestibility of feed ingredients for Shaanbei white cashmere goat

作　　者：李占臻[1] 李晓燕[1] 雷耀庚[1] 屈雷[2] 陈玉林[1] 杨雨鑫[1] 

机构地区：[1]西北农林科技大学动物科技学院,陕西杨凌712100 [2]陕西省榆林学院绒山羊工程技术研究中心,陕西榆林719000

出　　处：《草业科学》2014年第1期173-179,共7页Pratacultural Science

基　　金：国家公益性行业(农业)专项(20090300606);国家绒毛用羊产业技术体系(CARS-40-13);西北农林科技大学基本科研业务费(QN2009023);黄土高原农果牧复合循环技术集成与示范专项资金(2012BAD14B11)

摘　　要：选用7只年龄相同、体质量相近的陕北白绒山羊母羊,外科手术为其中3只安装永久性瘤胃瘘管,4只安装十二指肠"T"型瘘管,采用移动尼龙袋法和体外三步法研究了陕北白绒山羊常用的4种精饲料(棉粕、菜籽粕、玉米蛋白粉、酵母)和4种粗饲料[(桑(Morus alba)叶、芦苇(Phragmites australis)、紫穗槐(Amorpha fruticosa)、柠条(Caragana korshinskii)]在小肠中的降解特性。移动尼龙袋法测得棉粕、菜籽粕、玉米蛋白粉、酵母、桑叶、芦苇、紫穗槐、柠条的小肠粗蛋白的表观消化率依次是77.24%、60.08%、96.36%、18.49%、42.05%、49.62%、30.36%、52.21%。研究结果表明,玉米蛋白粉有提供高水平过瘤胃蛋白的潜能,体外三步法和移动尼龙袋法所测小肠粗蛋白降解率呈线性正相关,y=0.802 3x-0.128 5(R2=0.911 5)。In current study, seven Shaanbei white cashmere goats with the same age and similar weight were separately fitted with rumen fistula （3 goats） or with T-type duodenal fistula （4 goats）. Both the mobile nylon bag method and the three step in vitro procedure were employed to evaluate the apparent small intestinal digestibility of 8 feedstuffs, respectively. The apparent small intestinal digestibility of 8 feedstuffs （cotton meal, rape seed dregs, corn gluten meal, yeast, mulbrrry leaves, reed, amorpha, caragana） measured by mobile nylon bag was 77.24%、60.08%、96.36%、18.49%、42.05%、49.62%、30.36%、52.21%, respectively. Furthermore, regression analysis showed that there was positive correlation between the mobile nylon bag method and the three step in-vitro procedure which produced the equation of y=0.802 3x-0.128 5 （R2=0.911 5）. In conclusion, cornglutenmeal has the potential capability to provid higher rumen undegraded protein （RUP）.

关 键 词：小肠消化率 移动尼龙袋 体外三步法 陕北白绒山羊 

分 类 号：S827.5[农业科学—畜牧学]