The IHP depressed the sorption of Pi. The sorption sites were apparently the same for the two phosphates. The significance of this phenomenon still need further studies.

• IHP会对正磷酸盐的吸附造成影响。而这两种磷在土壤的吸附位置明显的相同。这种有意义的现象需再做更进一步的探讨。