动物营养学报Issue(8)：2145-2154,10.DOI:10.3969/j.issn.1006-267x.2014.08.016
6种肉牛常用粗饲料瘤胃降解特性和瘤胃非降解蛋白质的小肠消化率
Ruminal Degradation Characteristics and Small Intestinal Digestibility of Rumen Undegraded Protein of Six Kinds of Commonly Used Roughages for Steers
摘要
Abstract
This experiment was conducted to determine the ruminal degradation characteristics and small intesti-nal digestibility of rumen undegraded protein( RUP)of 6 kinds of commonly used roughages:ryegrass,hem-arthria compressa,sweet potato stem,corn stover silage,corn stover and rice straw. Three Xuanhan steers fit-ted with permanent ruminal cannulas were used. Nylon-bag technique was used to evaluate the ruminal degrad-ability and effective digestibility of dry matter( DM),crude protein( CP),neutral detergent fiber( NDF)and acid detergent fibre( ADF). Modified three-step in vitro method was used to evaluate small intestinal digestibil-ity of RUP of the roughages. The results showed as follows:1)the DM effective degradability of ryegrass and sweet potato stem was significantly higher than that of hemarthria compressa,corn stover silage,corn stover and rice straw( P<0.05),which were decreased in the above order. CP effective degradability and ADF effec-tive degradability of ryegrass were significantly higher than those of sweet potato stem,hemarthria compressa, corn stover silage,corn stover and rice straw( P<0.05),which were decreased in the above order. NDF effec-tive degradability showed ryegrass > sweet potato stem > corn straw silage > hemarthria compressa > corn sto-ver > rice straw,and the differences among roughages were significant( P<0.05). 2)The small intestinal di-gestibility of RUP of hemarthria compressa,corn stover and rice straw was not significantly different( P>0.05),and was significantly higher than that of corn stover silage,ryegrass and sweet potato stem( P<0.05), which was decreased in the above order. Intestinal digestible CP content of showed ryegrass > sweet potato stem >hemarthria compressa >corn stover silage >corn stover >rice straw ,and the differences among rough-ages were significant(P<0.05). In conclusion,ruminal degradation characteristics of roughages are dissimi-lar,and the potential that can provide digestible crude protein for small intestine is different. The effective de-gradability of DM,CP,NDF and ADF of ryegrass is the highest,small intestinal digestibility of RUP of hem-arthria compressa,corn stover and rice straw is higher,and ryegrass and sweet potato stem have higher intesti-nal digestible crude protein content.关键词
粗饲料/尼龙袋技术/瘤胃降解率/改进三步法/瘤胃非降解蛋白质的小肠消化率Key words
roughages/nylon-bag technique/ruminal degradability/modified three-step method/small intes-tinal digestibility of rumen undegraded protein分类
农业科技引用本文复制引用
陈艳,张晓明,王之盛,彭全辉,邹华围..6种肉牛常用粗饲料瘤胃降解特性和瘤胃非降解蛋白质的小肠消化率[J].动物营养学报,2014,(8):2145-2154,10.基金项目
农业部公益性行业（农业）科研专项经费 （）
