RESEARCH ON THE PROTEIN DEGRADATION OF DIFFERENT FEEDSTUFFS IN RUMEN
Liu Xiaohui Jing Gongliang(.Department of Animal Husbandry)
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 41μm)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 17 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%; 67.10% and 67.03% respectively. Group I 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 HI consisted of yellow corn, fish meal and sorghum with the lowest degradability being 47.62%, 38.69%, and 29.96% respectively.