【摘要】 以成年萨福克绵羊为试验对象,分别安装瘤胃瘘管、十二指肠近端T型瘘管和回肠远端T型瘘管,饲喂由鸭茅干草和配合饲料组成的不同瘤胃内可降解有机物/瘤胃内可降解粗蛋白质(OMR/CPR)比例的日粮,研究小肠可代谢性饲料蛋白质(MP)的变化规律。结果表明:随着OMR/CPR的提高,小肠内微生物氮的消化量显著降低,而过瘤胃饲料蛋白质氮显著增加;表观MP量随着OMR/CPR的增加呈先增加后减少的变化趋势,表观MP量占CP、DCP摄取量分别为42.2％-59.6％、63.6％-87.8％。更多还原

【Abstract】 Four Suffolk sheep fitted with rumen fistulae, proximal duodennum and distal ileum fistulae were used to determine the utilization rate of rnetabolizable feed protein in small intestine with different OMR/CPR(rumen rnetabolizable organism/rumen crude protein). The results showed that with the increase of OMR/CPR) the digestion of micro-bial-N in the intestine decreased and the amount of digested diet bypass-protein-N from rumen increased significantly. Apparent MP increased at the beganning then decreased. Percentage of apparent MP amount of rnetabolizable protein to intake of crude protein and digestible crude protein were 42. 2%-59. 6% and 63. 6%-87. 8% , respectively.更多还原