摘要： 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0.2108g/kg DMI，菜粕、豆粕及6个半纯合饲粮中磷表观消化率分别为-0.30%，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。

关键词: 生长猪, 菜粕, 豆粕, 磷, 内源排泄量, 真消化率

Abstract: The objective of this study was to determine the true P digestibility, the gastrointestinal endogenous P outputs associated with rapeseed and soybean meals. Six×Yorkshire Landrace barrows, with initial body weight of (24.8±1.42) kg, were fed six diets using a 6×6 Latin square design. The pig feed was compounded based on soybean meals, corn starch and glucose, including six levels of P (0.11%, 0.22%, 0.33%, 0.44%, 0.55%, 0.53% ), and the rapeseed and soybean meals were the only P source. Chromic oxide (3.5 g/kg of diet, as-fed basis) was included in the diets as digestibility marker. The experiment was divided into 6 stages and each stage lasted for a period of 8 d, of which 6 d for adaptation and 2 d for collection of representative fecal samples. The results showed that the P endogenous outputs for pig were 0.2108 g/kg DMI. The apparent P digestibility values were-0.30%, 25.77%, 7.25%, 16.29%, 16.54%, 23.62%, 15.04% and 28.97% for rapeseed meals, soybean meals, diet1, diet2, diet3, diet4, diet5 and diet6, respectively, and the true P digestibility for above treatments were 10.21%, 32.94%, 26.22%, 23.62%, 22.95%, 23.57%, 22.81% and 32.94%, respectively. In comparison with apparent P digestibility, the true P digestibility could better reflect the reality of P digestion from feed and should be used in swine diet formulation because of its stability in the same ingredients.

Key words: Growing pigs, Rapeseed meal, Soybean meal, Phosphorus, Endogenous outputs, True digestibility

中图分类号: 

• S858.28