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A Study on the True Digestibility of Phosphorus in Rapeseed Meal and Soybean Meal by Growing Pigs
Author(s): 
Pages: 175-179
Year: Issue:  2
Journal: ACTA AGRICULTURAE BOREALI-SINICA

Keyword:  生长猪菜粕豆粕内源排泄量真消化率;
Abstract: 选用6头健康大白×长白阉公猪为消化试验动物,采用6×6拉丁方设计,设6个磷水平(0.11%,0.22%,0.33%,0.44%,0.55%,0.53%),以豆粕、葡萄糖、玉米淀粉等为基础,以菜粕为待测植物性饲料,配制半纯合试验饲粮,其中菜粕和豆粕为磷唯一来源.日粮中添加0.35%Cr2O3作为外源指示剂.分6个试验期(每期8 d,6 d适应期,2d收粪期),测定了生长猪内源磷排泄量及菜粕和豆粕磷的真消化率.结果表明:生长猪内源磷的排泄量为0.210 8g/kg DMI,菜粕、豆粕及6个半纯合饲粮中磷表观消化率分别为-0.305,25.77%,7.25%,16.29%,16.54%,23.62%,15.04%,28.97%,而其真消化率分别为10.21%,32.94%,26.22%,23.62%,22.95%,23.57%,22.81%,32.94%.说明饲料磷真消化率更能反映动物对饲料磷消化吸收的真实情况,具有相对较好的重演性.
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