论文部分内容阅读
应用~(15)N 示踪技术,探讨了马头山羊在14.8%和5.8%两种日粮蛋白质水平下对稻秆粗蛋白的消化吸收和利用规律。结果表明:(1)通过粪尿排泄的稻秆~(15)N,两者没有差异,平均为858.3mx±30.4mx,占采食稻秆~(15)N 的34.1%±2.2%:(2)在排泄高峰值和达到高峰值的时间上两者差异较大,分别为233.8mg、183.2mg 和72小时、96小时,前者比后者提高27.6%,提前24小时;(3)日粮蛋白质水平的高低主要影响稻秆粗蛋白质在马头山羊组织器官中的潴留,分别为36.3%和21.6%,前者比后者高14.7%:(4)在14.8%和5.8%日粮蛋白质水平时,马头山羊对稻秆粗蛋白质的有效利用率为36.3%和21.6%。
The application of ~ (15) N tracing technique was used to investigate the digestion, absorption and utilization of horseradish goat under 14.8% and 5.8% dietary protein levels. The results showed that: (1) rice straw excreted by excreta and urine had no difference, with an average of 858.3mx ± 30.4mx, accounting for 34.1% ± 2.2% of the (15) N 2) There was a significant difference between the peak excretion and peak time, which were 233.8mg, 183.2mg and 72hours and 96hours respectively, the former increased 27.6% compared with the latter, 24 hours earlier; (3) Diet The level of protein mainly affected the retention of crude protein in the tissues and organs of goats by 36.3% and 21.6% respectively, the former was 14.7% higher than the latter (4) At 14.8% and 5.8% diet protein levels , The effective utilization rate of horse goat to the crude protein of rice straw is 36.3% and 21.6%.