动物营养学报2012，Vol.24Issue(4)：769-777,9.DOI:10.3969/j.issn.1006-267x.2012.04.023
奶牛常用粗饲料的瘤胃降解规律
Rumen Degradation Characteristics of Commonly Used Roughages for Dairy Cows
摘要
Abstract
This trial was conducted to study the rumen degradation characteristics of seven types of roughages: two kinds of alfalfa (American Anderson level 1 alfalfa and Heilongjiang Gongnong No. 1 alfalfa) , two kinds of Leymus chinensis with different contents of weeds (10% or 34% ) , corn silage, corn stover silage and corn stover. Nylon-bag technique was used to evaluate the rumen degradation rates and effective degradabilities of dry matter (DM) , crude protein (CP) , and neutral detergent fiber (NDF) of these roughages. The results showed as follows; DM degradation rates of American Anderson level 1 alfalfa, corn silage and Heilongjiang Gongnong No. 1 alfalfa at 72 h were not significantly different (P >0. 05) , and were significantly higher than those of the other roughages. DM effective degradability of American Anderson level 1 alfalfa was significantly higher than that of Heilongjiang Gongnong No. 1 alfalfa, corn silage and corn stover silage (P <0. 05) ; Leymus chinensis and corn stover had the lower DM effective degradability than others (P < 0. 05). CP degradation rate and effective degradability of American Anderson level 1 alfalfa were the highest at 72 h among seven types of roughages, and the degradation rate was significantly higher than that of Heilongjiang Gongnong No. 1 alfalfa, corn silage, corn stover silage, Leymus chinensis with 10% weeds, corn stover and Leymus chinensis with 34% weeds (P <0. 05). NDF degradation rates of corn silage and corn stover silage at 72 h were significantly higher than those of the other roughages (P < 0. 05) , but NDF effective degradabilities of two kinds of alfalfa were higher and followed by corn stover silage and corn silage; both NDF degradation rate and effective degradability of Leymus chinensis with 34% weeds were the lowest. In conclusion, for the degradation characteristics of seven types of roughages: 1) American Anderson level 1 alfalfa has the highest nutritional value, while Leymus chinensis with 34% weeds and corn stover have the lowest; 2) the content of weeds affects the nutritional value of Leymus chinensis; 3) the process of making silage can improve the nutritional value of corn stover.关键词
粗饲料/瘤胃降解/奶牛Key words
roughages/ rumen degradation/ dairy cows分类
农业科技引用本文复制引用
夏科,姚庆,李富国,李敏,段春宇,郗伟斌,张永根..奶牛常用粗饲料的瘤胃降解规律[J].动物营养学报,2012,24(4):769-777,9.基金项目
农业部现代农业(奶牛)产业技术体系(nycytx0202) （奶牛）
公益性行业(农业)科研专项(nyhyzx07-036-06) （农业）
