中文摘要：

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．结果为：（1）得出生长猪平均日增重（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（P＞0．05）；（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（P＞0．05）．由此，本研究推荐生长猪真可消化磷的需要量为0．34％，相应地，总钙的需要量为0．68％．

英文摘要：

Single factorial randomized-block design was used to study true digestible phosphorus （TdP） requirement of growing pigs by determining the growth performance and serum biochemical indexes. Experimental diets were designed with five TdP levels, and the ration of total calcium to TdP was 2： 1. The experiment results indicated that （1） The equation which was about the variety of ADG of growing pigs along with dietary TdP concentration was educed： y = - 809532x^4 ＋ 788079x^3 - 276250x^2 ＋ 42114x - 1758.8, （ R^2 = 0.9999, P 〈 0.01） .In the equation y is ADG of growing pigs （g/d）, and x is dietary TdP concentration （%）. The ADG of growing pigs achieved the biggest value which was 782g/d. （2） The equation was educed about the variety of F/G along with dietary TdP concentration： y = 3651.1x^4 - 3480.4x^3 ＋ 1183.8x^2 - 172.45x ＋ 10.86, R^2 = 0.9999, P 〈 0.01, in the equation y was F/G, and x was dietary TdP concentration （%）. The F/G of growing pigs were least which was 1.07 when dietary TdP concentration was 0.34 %. （3） An equation was educed according to the relationship of serum phosphorus concentration and dietary TdP concentration： y = -3311.7x^4 ＋ 3342.7x^3 - 1224.6x^2 ＋ 195.56x - 8.7418（ R^2 = 0.9999, P 〈 0.01 ）. The concentration of serum phosphorus presented the peak value when dietary true digestible phosphorus concentration was 0.34 %. Moreover, serum phosphorus concentration began to drop with ＂the rise of dietary true digestible phosphorus concentration when it exceeded 0.34%. （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 rarely influenced by dietary true digestible phosphorus concentration, and the variety trend of serum calcium concentration was in 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 tot