1.The results of experiments showed that,in calcareous chernozem and light chernozem,the inorganic-P accounted for 70——85%,Ca-p 25——48%,Al-P 4.2-7.6%,and Fe-P 1.4——2.4% of total P;in neutral black soil,inorganie-P was 40——50%.Ca-P 14——15%,Al-P 4——5% and Fe-p 4——5% of total P.The data indicate that the contents of vatious forms kof inorganic P in the two soil are in a descending order of Ca-P>Al-p>Fe-P.2.Plant analysis showed that the recovery rete of phosphorus by wheat was in a descending order of Al-P>Fe-P>Ca-P,less Ca-P was absorbed althoagh it was more in soil.