本论文第二部分主要研究了四种不同精粗比典型日粮条件下泌乳奶牛瘤胃氮素代谢、小肠蛋白质的消化吸收及其对生产性能的影响。
The second part was mainly conducted to study the effects of four typical diets on rumen nitrogen metabolism, protein digestion and absorption in the small intestine, and dairy cow's milk performance.
膳食纤维对于蛋白质代谢及氮平衡的影响不大，但可减少脂类和碳水化合物的吸收及利用。
Dietary fiber does not have significant effect on protein metabolism and nitrogen balance, but some fiber can decrease the absorption and availability of lipids and carbohydrates.
从丝素膜的溶解性及红外吸收光谱变化中，分析了有机溶剂对丝素蛋白质溶液的影响。
The change of fibroin protein influenced by organic solute was analysed with the solubility of fibroin film and change of infrared absorption spectrum.
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