The effects of P on the correlation between all the 3 kinds of endogenous phosphatases and those in the substrate had the following order: alkaline phosphatase >neutral phosphatase >acid phosphatase.

• 磷对甜菜内源和根外泌到营养液中3种磷酸酶之间相关性的影响，依次为碱性磷酸酶>中性磷酸酶>酸性磷酸酶，表现出较强的规律性。