饲料中磷的生物学效价评定方法

磷是动物机体必需的常量矿物质元素之一。准确评定饲料原料中磷的生物学效价是实现无机磷源合理添加,减少添加过量造成的经济损失,以及防止粪尿磷大量排泄的有效手段。本文就目前关于饲料中磷的生物学效价评定的方法即平衡试验法、斜率比法、估测法、三项指标综合法、体外溶解度法、体外透析法作一综述。

Phosphorus is an microessential element for animal. Accurate assessment of phosphorus biological value is a way to make sure the proper supplement of phosphorus in animal diets,which can reduce the feed cost and prevent the excessive phosphorus loss in manure.The methods of measuring the biological value of feed phosphorus including balance experiment, slope rate method,tri-index method,in vitro solubility and in vitro dialyse methods were reviewed.