Fractions of phosphorus in vegetable soils and farmland soils in Northwest China were explored. The results showed that the contents of total P and organic P in vegetable soils was 1.83~8.3 times as much as in farmland soils. The percentage of Olsen-P to total P and the percentage of Ca2-P, Ca8-P, Al-P and Fe-P to inorganic P were higher in vegetable soils than in farmland soil. In protected vegetable soils, P of various fractions accumulated mainly in the 0~30 cm soil layer and decreased with depth in soil profile. The decrease was more significant with the content of Olsen-P, Ca2-P, Ca8-P and Al-P than with Fe-P, O-P and Ca10-P.
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张学军,孙权,陈晓群,程淑华,张艳,王黎明.不同类型菜田和农田土壤磷素状况研究[J].土壤,2005,37(6):649-654. ZHANG Xue-jun, SUN Quan, CHEN Xiao-qun, CHENG Shu-hua, ZHANG Yan, WANG Li-ming. FRACTIONS OF PHOSPHORUS IN VEGETABLE SOILS AND FARMLAND SOILS[J]. Soils,2005,37(6):649-654