【摘要】 按同质原则将 28 只试羊(3~3.5 月龄)分为 4 个饲粮处理组,采用 3 因子(2×2×2)设计,研究两个营养水平(A 因子,A1—0.9NRC 和 A2—0.8NRC)下不同饲粮组合(B 因子,B1—添加甜菜渣和 B2—不添加甜菜渣)对不同杂交组合(C 因子,C1—波德代(♂)×蒙古羊(♀),C2—陶塞特(♂)×蒙古羊(♀))的育肥效果。结果表明,A、B、C 三因子对试羊平均日增重均无显著影响(P>0.05),仅正试期头 20 dC2日均增重显著(P<0.05)高于 C1。A1水平羔羊平均日采食量极显著(P<0.01)低于 A2,而饲料转化率及熟肉率极显著(P<0.01)高于 A2。B1正试期后 40 d 日均增重有高于 B2的趋势,而 GR 值有低于 B2的倾向。更多还原

【Abstract】 The three factorial designing of 2×2×2 and 28 lambs which they were divided into four groups were adopted to investigate the fattening effects of two levels of DE and CP (factor A, A1—0.9NRC, A2— 0.8NRC) and different diet combinations (factor B, B1, B2—with and without beet Pulp)on crossbred male lambs (3~3.5 months age) of Borderdale (♂)×Mongolian (♀) (14 lambs) and Poll Doset (♂)×Mongolian (♀) (14 lambs). The results indicated that there were no significant difference(P>0.05)on ADG of lambs between two treatments for the factor A, factor B, factor C and their interaction, except that during the first 20 days, the ADG of C2 was higher than that of C1 (P<0.05). Compared with A2, the intake of lambs fed on A1 was higher (P<0.01), but the FCR of A2 was much lower (P<0.01). During the last 40 days of the trial, a tendency indicated that the ADG of B1 was higher than that of B2, and its GR value was lower tendency than B2.更多还原