选用甘肃肉用绵羊新品种选育群初生公羔20只， 随机分为5组，观测了饲粮中添加不同剂量(0、37.50、75.00、112.50、150.00 mg/kg)酵母β-葡聚糖对早期断奶羔羊瘤胃氮代谢参数的影响，结果表明，添加酵母β-葡聚糖对日龄82 d的羔羊瘤胃液中总氮、氨氮和蛋白氮含量均没有显著影响(P＞0.05)，75.00 mg/kg的添加剂量组尿素氮含量有高于对照组的趋势(P=0.091)，食前150.00 mg/kg添加剂量组血清尿素氮显著低于对照组(P＜0.05)。

20 lambs(Gansu modern breeding sheep group) were randomly allotted to 5 groups to investigate the effect of different levels of yeast β-glucan(0， 37.50， 75.00， 112.50 and 150.00 mg/kg) on rumen nitrogen metabolism parameters. The results showed that there were no significant influence on total nitrogen， NH₃-N， protein nitrogen in ruminal fluid of lambs by adding yeast β-glucan(P＞0.05)， rumen urea nitrogen of 75.00 mg/kg yeast β-glucan supplement group had the trend of increasing than control group(P=0.091)， serum urea nitrogen content of 150.00 mg/kg yeast β-glucan supplement group were significantly higher than control group.

S826；Q532；S816.31

甘肃省重大科技专项 “高繁殖力肉羊新品种选育与产业化开发” (1102NKDH023)部分研究内容