【摘要】 通过瘤胃尼龙袋消化试验 (试验 1)和生长性能试验 (试验 2 )评价大豆皮替代羔羊饲粮中玉米或纤维饲料(玉米秸 )对瘤胃消化和生长性能的影响。饲粮处理为大豆皮替代饲粮中全部玉米 (SH C)、饲粮中 5 0 %纤维饲料(SH F)和对照饲粮 (CK)。试验 1结果表明 ,以大豆皮替代羔羊饲粮中全部玉米对于 2 4h和 4 8h干物质消化率(DMD)没有显著影响 (P >0 .0 5 ) ,但极显著降低了 2 4h和 4 8h细胞壁消化率 (NDFD) (P <0 .0 1) ;以大豆皮替代饲粮中 5 0 %纤维饲料显著提高了羔羊饲粮 2 4h和 4 8hDMD(P <0 .0 1)以及 4 8hNDFD(P <0 .0 5 )。试验 2结果表明 ,与对照组相比 ,SH C处理不影响羔羊日粮干物质采食量 (P >0 .0 5 )、日增重 (P >0 .0 5 )和饲料转化效率 (P >0 .0 5 ) ,但可以降低单位增重的饲料成本 ;SH F处理可以显著提高羔羊日粮干物质采食量 (P <0 .0 5 )、增重速度 (P <0 .0 1)和饲料转化效率 (P <0 .0 5 )。更多还原

【Abstract】 An in situ digestion experiment (Exp.1) and a growth trial (Exp.2) were conducted to evaluate the effect of replacing total corn and 50% fibrous ingredients (corn straw)with soybean hulls (SH) in lamb diets on rumen digestion and growth performance. Three dietary treatments used in this experiment were SH replacement for corn (SH-C), for (fibrous) ingredient (SH-F) and the control diet (CK). The result showed that SH-C did not change 24 h and 48 h ruminal digestibility of DM(DMD)(P>0.05), but decreased (P<0.01) the digestibility of 24 h and 48 h NDF (NDFD); SH-F significantly increased 24 h and 48 h DMD(P<0.01), and 48 h NDFD (P<0.05) in Exp.1. The result showed that compared with CK treatment, feeding SH-C diet had no effect on DMI(P>0.05),daily gain(P>0.05)and the feed conversion (P>0.05),and decreased cost/kg gain; feeding SH-F diet increased DMI (P<0.05), daily gain ((P<0.01)) and feed conversion (P<0.05) in Exp. 2.更多还原