采用单因子随机分组设计，以真可消化磷(TdP)为指标，配制了5种生长猪试验日粮，并使其总钙与TdP的比例为2:1。通过对生长性能和血清生化指标等的评定，对TdP需要量进行了初步研究。得到了：（1）生长猪平均日增重(ADG)随日粮TdP变化的多元方程；（2）拟合出了料肉比(F/G)随日粮TdP含量变化的多元方程；（3）根据血清无机磷浓度与日粮TdP含量的关系，也拟合出了多元方程；（4）血清碱性磷酸酶(ALP)活性随着日粮TdP含量的升高呈下降趋势。（5）血清钙浓度基本不受日粮真可消化磷含量的影响。血清钙浓度随日粮钙含量的变化趋势，与血清无机磷随日粮TdP含量变化的趋势相似，且各组之间差异不显著。由此，本研究推荐生长猪真可消化磷的需要量为0.34%，总钙的需要量为0.68%。

Single factorial randomized-block design was used to study true digestible phosphorus （TdP） requirement of growing pigs by determining growth performance and serum biochemical indexes. Experimental diets were designed five TdP levels, and the ration of total calcium to TdP was 2:1. The experiment results indicated that (1) we got the equation which was about the variety of ADG of growing pigs along with dietary TdP concentration. (2) The equation describing the relationship between F/G and dietary TDP concentration also was educed; (3) Another equation was educed according to the relationship of serum phosphorus concentration and dietary TdP concentration; (4) The serum ALP activity was falling continually with the rise of dietary true digestible phosphorus concentration (P＞0.05); (5) Serum calcium concentration was influenced by dietary true digestible phosphorus concentration hardly, and the variety trend of serum calcium concentration was accord with serum phosphorus concentration influenced by dietary TdP concentration. It was concluded that the dietary TdP requirement of growing pigs was 0.34% and total Ca requirement was0.68%.