研究了不同开垦年限黑土磷素的形态、数量的变化,结果表明:开垦后黑土全磷含量无明显规律性变化,但土壤有效磷数量显著上升,在土壤磷的组分上,土壤有机磷数量显著下降,而土壤无机磷明显升高。在土壤无机磷的6个组分中,Fe-P、O-P占比例最大;其次Al-P、Ca10-P;再次Ca2-P、Ca8-P。垦后无机磷6个组分含量都有升高,绝对升高量顺序为Fe-P>Al-P>Ca2-P>O-P>Ca10-P>Ca8-P。上升强度顺序为Ca2-P>Al-P>Ca8-P>Ca10-P、Fe-P>O-P. The results showed that there was no obvious regularity of total phosphorus content in black soil after reclamation, but the amount of available phosphorus in soil increased significantly. The content of soil organic phosphorus Significantly decreased soil inorganic phosphorus was significantly increased. In the six components of soil inorganic phosphorus, Fe-P, O-P accounted for the largest proportion; followed by Al-P, Ca10-P; again Ca2-P, Ca8-P. The content of inorganic phosphorus in cultivated land increased with the increasing order of Fe-P> Al-P> Ca2-P> O-P> Ca10-P> Ca8-P. The order of ascending intensity was Ca2-P> Al-P> Ca8-P> Ca10-P and Fe-P> O-P.