本试验旨在测定代表性肉鸭饲料原料的总磷和植酸磷含量及其磷真利用率，并建立各原料真可利用磷的预测模型，丰富肉鸭饲料原料数据库，为肉鸭饲粮配方的精确配制提供科学依据。试验收集全国各地常用肉鸭饲料原料，以不同来源饲料原料的化学成分特点及变异规律为依据选出30种代表性样品，采用化学分析法测定样品的总磷和植酸磷含量，以成年樱桃谷公鸭为试验动物，采用排空强饲法测定样品的磷真利用率，并对原料总磷、植酸磷与真可利用磷三者进行回归分析。结果表明，采用排空强饲法测得肉鸭对代表性玉米、小麦加工副产物、豆粕、菜籽粕、玉米干酒糟及其可溶物（DDGS）样品磷的平均真利用率分别为80.65%、39.01%、53.03%、38.69%和45.55%。用总磷（X1）和植酸磷（X2）2个指标建立真可利用磷（Y）的预测模型，其中玉米、小麦加工副产物和豆粕样品的预测模型显著且决定系数较高，回归方程分别为Y=0.008+1.226X1－0.595X2（R2=0.98，RSD=0.004，P<0.05）、Y=0.047－0.148X1+0.640X2（R2=0.77，RSD=0.060，P<0.05）和Y=－0.141+2.779X1－4.610X2（R2=0.85，RSD=0.084，P<0.05）。由此可见，用总磷和植酸磷可以准确预测玉米、小麦加工副产物和豆粕的真可利用磷含量。

The objective of this study was to evaluate the correlation among total phosphorus, phytate phosphorus and true availability of phosphorus in adult Cherry Valley ducks, and the regression models of true available phosphorus in common feedstuffs were established, which could provide scientific evidence for an exact feed formula in ducks. Common feedstuffs for ducks were collected from the country, and 30 feedstuffs were selected as the representative samples according to the chemical composition and variation. The contents of total phosphorus and phytate phosphorus were determined by chemical composition analysis, and true availability of phosphorus was determined by fasting-force feeding. The regression among the total phosphorus, phytate phosphorus and true available phosphorus was analyzed. The results showed that true availability of phosphorus in corn, wheat milling by-products, soybean meal, rapeseed meal and corn DDGS samples for ducks were 80.6%, 39.01%, 53.03%, 38.69% and 45.55%, respectively. Significant prediction models and high correlations were observed in corn, wheat milling by-products and soybean meal samples, and the regression equations among available phosphorus (Y), total phosphorus (X1) and phytate phosphorus (X2) were Y=0.008+1.226X1－0.595X2 (R2=0.98，RSD=0.004，P<0.05)、Y=0.047－0.148X1+0.640X2 (R2=0.77，RSD=0.060，P<0.05) and Y=－0.141+2.779X1－4.610X2 (R2=0.85，RSD=0.084，P<0.05). In conclusion, the content of true availbilal phosphorus in corn, wheat milling by-products and soybean meal can be accurately predicted by total phosphorus and phytate phosphorus.［Chinese Journal of Animal Nutrition，2011，23（2）：258-265］