设施土壤养分和盐分累积状况研究

对山西省主要设施农业区土壤盐分和养分现状进行了调查分析，结果表明，土壤可溶性盐、EC值、速效养分均高于大田土壤，土壤pH值出现了降低趋势，有机质含量增幅不大，养分全量盈亏参差。土壤可溶性盐含量已接近次生盐渍化和作物生理障碍临界值，土壤有机质含量较低和土壤养分库中N、P盈余、K亏耗的局面及大量施用化学肥料后引发的土壤属性“载体化”的现象应引起足够的重视。

The Accumulation of Installing Soil Soluble Salts and Nutrients in Shanxi Province

The content of soil soluble salts and nutrients in the primer installing agriculture area has been investigated in Shanxi province. The results show that content of soil soluble salts, available nutrients and EC volume was higher than open-land soil. The soil pH volume decreased and content of organic matter increased just over compared to open-land soil. Some of the content of soil total nutrients was increased, and some of that decreased. The content of soil soluble salts was critical state that secondary salts and physiological hindrance of crop. The soil properties should be paid attention such as the content of organic matter was lower, the nutrients N and P increased and K decreased in the soil nutrient storage, and the "carrier" phenomena by fertilizer was used in large quantities.