【摘要】 将24只7月龄阉山羊(平均体重为17.53 kg)随机等分为3组,饲喂含细粉(平均粒度0.76 mm)、粗粉(平均粒度2.57 mm)及整粒玉米的全混日粮,3组日粮配方一致,日粮干物质中玉米含量均为28.35%。结果表明,玉米粒度不影响干物质采食量、生长性能以及日粮干物质、能量、粗蛋白、中性洗涤纤维和酸性洗涤纤维的全消化道表观消化率(P>0.05)。与细粉和粗粉玉米组相比,整粒玉米组降低了淀粉的全消化道表观消化率(P<0.05),趋于提高阉山羊的日增重(P=0.1396)。更多还原

【Abstract】 Twenty-four wether lambs(seven mo.old,mean BW 17.53 kg) were used in a randomized complete design experiment of three treatments to determine the effects of corn particle size on growth performance and nutrient digestibilities.The three groups had the same diets which contain 28.35% corn.The three particle sizes of corn were whole grain,coarsely cracked corn(mean particle size 2.57 mm) and finely cracked corn(mean particle size 0.76 mm).Corn particle size did not affect DMI,growth performance and the total tract apparent digestibilities of DM,GE,CP,NDF and ADF(P>0.05).Compared with finely and coarsely cracked corn,ADG had the tendency of improvement(P=0.1396),and starch digestibilities in the total tract was reduced(P<0.05) in lambs fed whole corn.更多还原