康乃尔净碳水化合物蛋白质系统评价常用饲料碳水化合物和蛋白质瘤胃降解  

A evaluation for rumen degradability of carbohydrate and protein in common feedstuffs by CNCPS

作　　者：薛红枫[1] 任丽萍[1] 周振明[1] 孟庆翔[1] 

机构地区：[1]动物营养学国家重点实验室

出　　处：《中国农业大学学报》2007年第1期45-50,共6页Journal of China Agricultural University

基　　金：国家自然科学基金资助项目(30270944);国家杰出青年基金资助项目(30125033)

摘　　要：为探讨采用康乃尔净碳水化合物蛋白质系统评价中国肉牛饲料碳水化合物和蛋白质瘤胃降解的可行性,以装有永久性瘤胃瘘管的西门塔尔×本地黄牛杂交阉牛为试验动物,采用尼龙袋法对8种常用肉牛饲料,包括粗饲料(苜蓿干草、玉米青贮、羊草和小麦秸)、能量饲料(玉米、大麦和麸皮)和蛋白质饲料(豆粕)的瘤胃降解率进行了实际测定,并用康乃尔净碳水化合物蛋白质系统进行评价。结果表明:能量饲料和粗饲料总碳水化合物含量平均值都高于蛋白质饲料;能量饲料和蛋白质饲料的总可消化养分含量、干物质和碳水化合物组分B1的潜在降解率和有效降解率都高于粗饲料;8种饲料干物质有效降解率与碳水化合物组分B1的有效降解率呈高的正相关(r=0.9574),粗蛋白的有效降解率与中性洗涤不溶蛋白质的有效降解率及其含量都呈高的负相关,r分别为0.8836和0.8515。康乃尔净碳水化合物蛋白质系统评价中国肉牛饲料碳水化合物和蛋白质瘤胃降解具有一定的可行性。To discuss the feasibility of evaluation of rumen degradability of carbohydrate and protein in Chinese feedstuffs by Cornell Net Carbohydrate and Protein system （CNCPS）, three Simmental × Native yellow cattle fitted with rumen cannulas were used for the study on rumen degradability of chemical compositions in 8 common feedstuffs, including rough feedstuffs （alfalfa hay, corn silage, Chinese ryegrass hay and wheat straw）, energy feedstuffs （maize, barley and wheat bran） and protein feedstuff （soybean meal） by in sacco. Results of the evaluation showed that mean CHO contents of the rough and energy feedstuffs were higher than those of the protein feedstuffs. For TDN contents, potential degradabilities （a＋ b） and effective degradabilities （ED） of DM and CBt, values for energy and protein feedstuffs were higher than those for rough feedstuffs. There was a highly significant positive correlation （ r = 0,957 4） between ED of CB1 and that of DM, but negative correlations were noted between ED of CP and that of NDICP （ r = 0. 883 6） and between ED of CP and NDICP content （r = 0. 851 5）. These results suggested that CNCPS may be used to evaluate rumen degradability of carbohydrate and protein in Chinese feedstuffs to some extent.

关 键 词：康乃尔净碳水化合物蛋白质系统 碳水化合物 蛋白质 瘤胃 饲料 降解 

分 类 号：S816.2[农业科学—饲料科学]