摘要： 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%。

关键词: 土壤磷含量, 无机磷分级, 温室, 栽培年限

Abstract: 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 Ca₁₀-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，Ca₁₀-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.

Key words: Soil P stocks, Inorganic P fractions, Solar greenhouse, Planting term

中图分类号: 

• S158