P nutrient management and specific ecological conditions of solar greenhouse influence P cycling and utilization. The objects of this research is to explore changes of calcareous soil P stocks and inorganic P fractions in solar greenhouse with planting term in Shanxi, which will guide for P use efficiency improvement and diminishing negative impacts to environment. The results demonstrated that the contents of soil total P ,inorganic P,Olsen-P and fractions of inorganic P( including Ca2-P,Ca8-P,Ca10-P,Al-P,Fe-P) significantly increased with continuous planting term. Whereas correlation coefficient( r) of Olsen-P with planting term was lower than those of soil total P and inorganic P. The influence of cultivating term on Cal0-P was the lowest among the inorganic P fractions. Planting term had no any effect on the percentage of inorganic P in soil total P. The percentages of Ca2-P, Ca8-P, Cal0-P, Fe-P and Al-P of inorganic P were 3. 4% ,23. 9% ,67. 2% ,3. 3% and 2. 0% respectively, in soil which crops were grown. When the land was converted to solar greenhouse for vegetable production, ratio of Ca2-P in inorganic P increased to 8% -9% during the first two planting years and then kept stable. Meanwhile ratio of Ca8-P in inorganic P researched to 50% when the soil was used as solar greenhouse for 4-5 years. Afterwards the ratios of inorganic P fractions were not influenced by planting term.%日光温室的施肥管理和生态条件会影响土壤P素循环和利用,明确山西石灰性土壤P素变化对提高温室P肥利用效率和降低对环境影响具有重要意义.通过对山西中南部栽培年限为0～15年的温室土壤分析表明:随栽培年限增加,土壤全P、无机P、Olsen-P及无机P组分的Ca2-P,Ca8-P,Ca10-P,Al-P,Fe-P含量均明显增加,但Olsen-P含量的增加幅度低于全P和无机P含量的增加；Ca10-P含量的增加幅度低于其他无机P组分Ca2-P,Ca8-P,Al-P,Fe-P含量的增加,其中,Ca8-P含量增加最为明显.栽培年限对无机P占全P的比例没有影响；粮田Ca2-P,Ca8-P,Ca10-P,Fe-P和Al-P占无机P的比例分别为3.4％,23.9％,67.2％,3.3％和2.0％,栽培2年后,Ca2-P占无机P的比例提高到8％～9％,然后趋于稳定；栽培年限4～5年后,Ca8-P占无机P的比例高达50％.
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