摘要
选用3头安装永久性瘤胃瘘管的健康荷斯坦产奶牛为试验动物,选取8种北方地区奶牛常用蛋白质饲料原料为试验样品,每个样品设3个重复,用尼龙袋法分别测定各个样品的粗蛋白质(CP)、中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)在瘤胃内的动态降解率和有效降解率。结果表明:(1)所选8种蛋白质饲料原料中葵花粕的粗蛋白质(CP)有效降解率均高于其他粗饲料,达到61.17%以上,酒精粕的粗蛋白质(CP)有效降解率最低,仅为19.03%。(2)在饲喂基础上,玉米蛋白粉所含的瘤胃降解蛋白质(RDP)的比例最高,达到30.99%以上,而酒精粕所含的比例最低,仅为5.52%。(3)豆粕所含的中性洗涤纤维(NDF)的有效降解率最高,达到50.74%以上,而菜籽粕的最低,仅为11.06%。(4)玉米蛋白粉所含的酸性洗涤纤维(ADF)的有效降解率最高,达到59.23%以上,而酒精粕的最低,仅为11.27%。
To study the effective degradation rate of protein and fiber of vegetable protein feeds frequently used in northern China and try to provide scientific basis for using roughages,an experiment was conducted using throe Holstein cows fitted permanent rumen fistula to estimate the dynamic degradability and effective degradation rate of crude protein （CP）and neutral detergent fiber （NDF）and acid detergent fiber （ADF）in rumen by nylon bag technique.The results showed： （1）The effective degradation rate of CP of sunflower meal was the highest among all eight kinds of vegetable pro- tein feeds,which was 61.17 % ;the one of lees meal was the lowest,which was only 19.03 %. （2）On the basis of feeding, the rumen degradation protein （RDP）of corn gluten meal was higher than other vegetable protein feeds,which was about 30.99 %;the RDP of lees meal was the lowest,which was only 5.52 %. （3）The effective degradation rate of NDF of soy- bean meal was the highest,which was 50.74 %;the one of rape seed meal was the lowest, which was only 11.06 %. （4）The effective degradation rate of ADF of corn gluten meal was the highest,which was 59.23 % ;the one of lees meal was the lowest,which was only 11.27 %.
出处
《中国饲料》
北大核心
2010年第8期13-17,共5页
China Feed
基金
"十一五"国家科技支撑计划课题(2006BAD04A15)
