| 摘要: |
| 本研究在7头置备永久性瘤胃瘘管的奶山羊上进行,采用孔径为41μm的尼龙袋技术,分别用3×3和4×4拉丁方,测定了15种常用饲料、8种混合精料和经不同方法保护的17种蛋白质饲料的蛋白质消失率。根据降解率的高低,可将15种饲料分成三类。第一类是麸皮、黑豆、苜蓿粉、肉骨粉、大麦和花生饼,降解率最高,分别为86.86％,74.68％,73.76％,68.24％,67.10％,67.03％;第二类是小米、玉米青贮料、棉仁饼、菜籽饼和干草粉,降解率中等,分别为64.56％,61.06％,59.70％,58.76％,52.92％,52.41％;第三类是黄玉米、鱼粉和高梁,降解率最低,分别为47.62％,38.69％,29.96％。 |
| 关键词: 蛋白质降解,蛋白质降解率,饲料营养,瘤胃,动物营养 |
| DOI： |
| 分类号: |
| 基金项目: |
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| RESEARCH ON THE PROTEIN DEGRADATION OF DIFFERENT FEEDSTUFFS IN RUMEN |
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Liu Xiaohui Jing Gongliang
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| Abstract: |
| Seven dairy goats fitted with permanent ruminal cannulae were involved
in this study.The degradation of crude protein in different feedstuffs was
studied with the nylon bags (with a sieve of 41 μm)suspended in goat rumens.
The 3×3 or 4×4 Latin square design was used to determine the disappearance rates of dry matter and crude protein of 15 kinds of feedstuffs,
3 kinds of mixed feedstuffs and l7 kinds of protein supplements treated with
different methods.The 15 feedstuffs were divided into 3 groups according
to their crude protein degradabilities.Group I included bran,black beans,
alfalfa meal,meat and bone meals,barley and peanut cakes with highest
degradability being 86.86％,74.68％;73.76％;68.24％,67.l0％ and 67.03％
respectively.Group 11 covered millet,soybean meal,corn silage,cotton
seed meal,rape seed meal and grases with the intermediate degradability
being 64.56％,61.06％,59.70％,58.76％,52.92％ and 52.41％ respectively.
Group 111 consisted of yellow corn,fish meal and sorghum with the lowest
degradability being 47.62％,35.69％,and 29.96％ respectively. |
| Key words: protein degradation,protein degradability, feedstuff nutrient,rumen,animal nutrient |
