移动尼龙袋法对常用饲料蛋白质小肠消化率的研究  

Intestinal digestibility of crude protein and dry matters with ruminant feedstuffs using the mobile nylon bag

作　　者：周荣[1] 王加启[1] 张养东[1] 潘发明[1] 卜登攀[1] 魏宏阳[1] 周凌云[1] 

机构地区：[1]中国农业科学院北京畜牧兽医研究所动物营养学国家重点实验室,北京100193

出　　处：《东北农业大学学报》2010年第1期81-85,共5页Journal of Northeast Agricultural University

基　　金："十一五"科技支撑计划(2006BAD12B08);现代农业产业技术体系建设专项资金资助

摘　　要：文章旨在研究反刍动物常用饲料的干物质和粗蛋白质小肠消化参数,为科学配制日粮提供依据。试验选用3头装有瘤胃瘘管和十二指肠瘘管的干奶牛,采用移动尼龙袋法研究了饲料瘤胃非降解蛋白在小肠中的消化吸收。结果表明,在瘤胃发酵16h后,蛋白类饲料的干物质与粗蛋白降解率高于粗饲料和能量饲料。豆粕、棉籽粕、菜籽粕、花生饼、麻籽饼、亚麻籽饼、膨化大豆、DDGS、啤酒糟、玉米、苜蓿、羊草和全株玉米青贮的干物质小肠消化率依次是:0.69、0.35、0.38、0.74、0.11、0.40、0.80、0.52、0.35、0.67、0.14、0.09和0.03;蛋白质的表观小肠消化率依次:0.91、0.80、0.71、0.92、0.64、0.79、0.96、0.70、0.89、0.61、0.61、0.61和0.63。由此可见,不同饲料瘤胃降解和消化特性不同,过瘤胃蛋白为小肠提供的可消化吸收蛋白质的潜力也不同。The study was to provide the Chinese Feed bank with intestinal digestibility （Idg） of crude protein（CP） and dry matters（DM）. The mobile nylon bag technique was used to investigate the apparent small intestinal digestibility of crude protein（CP） and dry matters（DM）.Three dairy cows fitted with permanent ruminal cannulas and T-type duodenal cannulas were used to investigate intestinal digestibility of CP and DM by mobile nylon bag technique in soybean meal（SBM）, cottonseed meal（CSM）, rapeseed meal （RSM）, peanut meal （PM）, flaxseed meal （FSM）, linseed meal （LSM）, distillers dried grains （DDGS）, expanded soybean（ES）, corn grain（CG）, brewer＇s grains（BG）, alfalfa hay（AH）, chinese wildrye（CW） and whole corn silage（WCS）. The disappearance of DM both after 16 h incubation in rumen and the intestine were measured. The content of CP was determined in each feedstuff and the rumen residue, as well as in the intestinal residue. The results showed that the disappearance of test protein feeds was higher than other feedstuff; the CP intestinal digestibility of SBM, CSM, RSM, PM, FSM, LSM, DDGS, ES, CG, BG, AH, CW and WCS were 0.91, 0.80, 0.71, 0.92, 0.64, 0.79, 0.96, 0.70, 0.89, 0.61, 0.61, 0.61 and 0.63, while the DM digestibility were 0.69, 0.35, 0.38, 0.74, 0.11, 0.40, 0.80, 0.52, 0.35, 0.67, 0.14, 0.09 and 0.03 respectively. We could see that the intestinal digestibility of the feedstuff of all kinds were dissimilar, and the potential that could provide for animal with intestinal protein was different.

关 键 词：小肠消化率 移动尼龙袋 反刍动物 蛋白质 

分 类 号：S816[农业科学—饲料科学]