不同土地利用类型土壤养分变化研究

Variation of Soil Nutrient Content under Different Land-uses of Xinyuan in Xinjiang

测定了不同土地利用类型土壤碱解氮、有效磷、速效钾、pH、有机质、微量元素(铁、锰、铜、锌)指标,并基于土壤质量评价指标比较分析不同土地利用方式的土壤质量。结果表明,农田土壤不同养分质量分数变幅大于其他土地利用类型。不同土地利用类型的土壤有效磷变异系数最大,pH变异系数最小。林地土壤锌质量分数变幅大于其他土地利用类型。土壤质量综合指标排序为草地>农田>水域>林地>果园>荒地。

The indexes of soil nutrients, including alkali nitrogen, available phosphorus, available potassi- um, organic matter, pH and trace elements （Iron, Manganese, Copper, Zinc）, were measured and soil quality under different land-use types were analyzed based on the evaluation index of soil quality. The re- sults showed that the soil nutrient contents in farmland changed more significantly than any other land-use types. Variation coefficient of available phosphorus under different land-use types was the greatest while the variation coefficient of pH was the smallest. The content of zinc in woodland soil was higher than any other land-use types. Indexes of soil quality were as follows： grassland （0. 647）〉 farmland （0. 616）;〉wa- ter-land（0. 575）〉the forest（0. 555）〉 the unused-land（0. 319）. The research of soil nutrients variation can provide the basic guidelines for practical land use management and adjustment, soil protection and sus- tainable development.