日粮能氮比对燕山绒山羊生长性能及 营养物质表观消化率的影响

张继伟,高昆,张英杰,刘月琴,段春辉

Effects of Diets with Energy-to-Nitrogen Rations on Growth Performance and Nutrients Apparent Digestibility in Growing Yanshan Cashmere Goat

ZHANG JiWei,GAO Kun,ZHANG YingJie,LIU YueQin,DUAN ChunHui

表3 不同能氮比对25—35 kg燕山绒山羊生长性能的影响

Table 3 Effects of different energy-to-nitrogen rations on growth performance of Yanshan cashmere goats from 25 kg to 35 kg BW

项目 Items 始重 IW (kg) 末重 FW (kg) 平均日增重 ADG (g) 干物质采食量 DMI (kg·d-1) 料重比 F/G 组别 Groups Ⅰ组 26.22±2.63 35.06±2.77 175.02±35.16b 1.02±0.17a 5.99±1.11ab Ⅱ组 24.49±3.26 33.94±3.44 189.11±32.36ab 1.05±0.16a 6.60±1.15a Ⅲ组 24.36±1.98 33.70±3.20 186.89±46.03ab 1.06±0.17a 6.02±1.63ab Ⅳ组 25.20±2.45 33.39±4.23 163.78±33.65b 0.93±0.12b 5.87±1.29ab Ⅴ组 24.61±3.63 35.71±4.58 222.00±38.39a 1.09±0.23a 5.08±1.02bc Ⅵ组 25.09±3.29 33.44±2.74 167.11±52.17b 0.87±0.14bc 5.73±2.04abc Ⅶ组 24.58±2.36 33.76±3.27 183.69±36.24ab 0.83±0.13c 4.67±0.99bc Ⅷ组 24.78±3.19 35.19±2.43 208.27±23.98a 0.93±0.19b 4.52±0.52c Ⅸ组 25.37±4.07 34.33±4.25 179.33±46.91ab 0.81±0.14c 4.80±1.16bc P值 P value 能量Energy 0.990 0.963 0.783 <0.001 <0.001 蛋白Protein 0.695 0.469 0.006 <0.001 0.866 能量×蛋白 Energy × protein 0.757 0.637 0.293 <0.001 0.310 主效应 Main effect 能量 Energy 低Low 25.02±2.71 34.23±3.09 183.67±37.34 1.05±0.16a 6.20±1.30a 中Medium 24.97±3.05 34.18±3.94 184.30±48.78 0.97±0.19b 5.68±1.72a 高High 24.91±3.17 34.43±3.32 190.43±37.77 0.86±0.16c 4.66±0.90b 蛋白 Protein 低Low 25.33±2.48 34.07±3.42 174.16±34.67b 0.93±0.16b 5.62±1.52 中Medium 24.63±3.23 34.95±3.54 206.46±33.79a 1.03±0.20a 5.40±1.27 高High 24.94±3.13 33.83±3.34 177.78±47.28b 0.92±0.19b 5.52±1.67