中国畜牧杂志2018，Vol.54Issue(3)：62-66,5.DOI:10.19556/j.0258-7033.2018-03-062
生长猪饲粮磷水平对磷酸氢钙中磷真消化率评定的影响
Effects of Dietary Phosphorus Levels on the Estimation of True Phosphorus Digestibility in Dicalcium Phosphate for Growing Pigs
摘要
Abstract
The present study was conducted to investigate the effects of dietary phosphorus (P) levels on the estimation of true total tract digestibility of phosphorusin dicalciumphosphate (DCP) for growing pigs.Fifty-six barrows (average initial BW of 26 ± 0.25 kg) were assigned into 7 treatment groups.There were 8 replicates in each treatment group with 1 pig per replicate.The 7 experimental diets included a corn-soybean meal diet without DCP supplementation and 6 treatment diets supplemented with graded levels of DCP at 0.64％,1.28％,1.92％,2.56％,3.20％,and 3.84％ respectively.Chromic oxide (Cr2O3) was used as digestibility marker.The results showed that apparent total digestibility of P increased (linear P＜0.01 quadratic P＜0.05) with increasing DCP levels for growing pigs.The true total tract digestibility of P in DCP determined by the difference method increased quadraticly with increasing DCP levels.Using the regression method,the true total tract digestibility of P in DCP for growing pigs feed low P diets were calculated to be 87.06％ which was greater than the estimated value of 38.05％ for pigs feed high P diets.In summary,the results of this study indicate that dietary P levels affect the estimates of true total tract digestibility of P in DCP determined by the difference method and the regression method.Dietary P concentration should be set at a level close to the requirement of P when the difference method was used to calculate the true total tract digestibility of P.Furthermore,dietary P levels should be formulated below the requirement of P when the regression method was applied to determine the true total tract digestibility of P in assay feed ingredients.关键词
磷/真消化率/差量法/线性回归法/生长猪Key words
True total tract digestibility/Difference method/Regression method/Pigs分类
农业科技引用本文复制引用
曹山川,伍凤,陈亮,刘明,张宏福,刘静波..生长猪饲粮磷水平对磷酸氢钙中磷真消化率评定的影响[J].中国畜牧杂志,2018,54(3):62-66,5.基金项目
四川省教育厅资助科研项目(17ZA0413) （17ZA0413）
中央级基本科研业务费项目(2017ywf-zd-18) （2017ywf-zd-18）
