The results of correlation and path analysis showed that available P significantly correlated to Ca 2-P, Fe-P, Al-P, LOP and MLOP, and there was a positive effect of Ca 2-P, Fe-P, Al-P, LOP, MROP and MLOP on the available P.

• 相关和通径分析表明 ,土壤有效磷与Fe P、Al P、LOP和MLOP之间呈显著正相关 ; Ca2 P、Fe P、Al P、LOP、MROP和MLOP对土壤有效磷均有一定的正效应。