高山美利奴育成羊的能量与蛋白质需要量

王晨,张宏伟,王虎成,孙晓萍,李发弟,杨博辉

Energy and Protein Requirements of Alpine Merino Growing Sheep

WANG Chen,ZHANG HongWei,WANG HuCheng,SUN XiaoPing,LI FaDi,YANG BoHui

表5 饲喂水平对高山美利奴育成羊氮平衡的影响

Table 5 Effects of feed intake level on nitrogen balance of Alpine Merino growing sheep

性别 Gender 项目 Items 组别 Groups SEM P AL IR80 IR60 IR40 育成公羊 Growing male sheep 氮采食量 NI (g·d-1) 39.07a 34.71b 25.98c 17.65d 2.13 <0.001 粪氮 FN (g·d-1) 12.33a 10.66a 5.88b 3.31c 0.99 <0.001 尿氮 UN (g·d-1) 11.48 11.39 15.22 14.58 0.69 0.074 消化氮 DN (g·d-1) 26.74a 24.04a 20.10b 14.34c 1.27 <0.001 氮表观消化率 NAD (%) 68.33b 69.28b 77.37a 81.25a 1.71 0.003 沉积氮 RN (g·d-1) 15.26a 12.65a 4.88b -0.23c 1.64 <0.001 沉积氮/氮采食量 RN/IN (%) 39.07a 36.45a 18.79b -1.33c 4.43 <0.001 沉积氮/消化氮 RN/DN (%) 57.55a 52.75a 24.30b -1.65c 6.48 <0.001 育成母羊 Growing female sheep 氮采食量 NI (g·d-1) 25.73a 20.59b 15.31c 10.38d 1.52 <0.001 粪氮 FN (g·d-1) 10.78a 6.88b 3.85c 2.38d 0.84 <0.001 尿氮 UN (g·d-1) 8.04b 10.13a 11.34a 10.28a 0.40 0.032 消化氮 DN (g·d-1) 14.95a 13.70a 11.46b 8.00c 0.74 <0.001 氮表观消化率 NAD (%) 57.86c 66.56b 74.84a 77.07a 2.07 <0.001 沉积氮 RN (g·d-1) 6.91a 3.57b 0.12c -2.28d 0.91 <0.001 沉积氮/氮采食量 RN/IN (%) 26.90a 17.34b 0.77c -21.99d 4.88 <0.001 沉积氮/消化氮 RN/DN (%) 46.69a 26.09b 0.99c -28.38d 7.37 <0.001