In this paper various compounds of phosphorus(P) in soils were fractionized pinto H₂0-P,Al-P,Fe-P,Ca-lP，Occluded P(O-P)，labile organic P(LO-P)，moderate labile organic P(MLO-P), moderate resistant organic P(MRO-P) and High Resistant organic P(HRO-P). Available P in soils and up-taken P in lolants were determined. The interaction effect among fractions of P and the relative availibility of these P fraction were discussed in terms of path analysis. The results are showed as follows.