以北方一般耕地和蔬菜保护地为供试土壤 ,研究了不同种植条件下土壤磷素状况 ,蔬菜保护地土壤磷素的空间分布特性。结果表明 ,蔬菜保护地土壤全磷、无机磷、有机磷、Olsen P的平均含量是一般耕地土壤的 2 7～ 14 0倍 ,土壤Olsen P占全磷的比率 ,Ca2 P ,Ca8 P ,Al P占土壤无机磷的比率显著高于一般耕地土壤。蔬菜保护地土壤各形态磷素主要积累在 0～ 2 0cm土层 ,并随土层深度的增加各形态磷素的含量逐渐降低 ,各土层Olsen P ,Ca2 P ,Ca8 P ,Al P含量降低幅度明显高于Fe P ,O P ,Ca10 P含量的降低值 Taking the northern general cultivated land and vegetable reserve as test soil, the status of soil phosphorus under different planting conditions and the spatial distribution characteristics of soil phosphorus in vegetable protected area were studied. The results showed that the average content of total phosphorus, inorganic phosphorus, organic phosphorus and Olsen P in the soils protected with vegetables was 27- 140 times that of the arable land, the ratio of Olsen P to total phosphorus, Ca2P, Ca8P, AlP Soil inorganic phosphorus ratio was significantly higher than the average arable land. The content of phosphorus in the soil of vegetable protection land mainly accumulated in 0 ~ 20 cm soil layer, and the content of phosphorus in various forms gradually decreased with the soil depth increasing, and the contents of Olsen P, Ca2 P, Ca8 P and Al P decreased The amplitude was significantly higher than that of Fe P, OP and Ca10 P