雨城区土壤养分变异及土壤可持续利用研究

Study of Soil Nutrient Variation and Sustainable Utilization of Soil in Yucheng County

通过实地采样分析及调查收集数据,对比研究四川省雅安市雨城区1981年(第二次土壤普查)到2002年20年来的耕地土壤养分变化,结果表明,全区耕地土壤平均有机质、全氮、速效钾分别提高了20%,30%,16 4%,全磷下降了42%。不同土地利用方式,水田的土壤养分总体升高,旱地土壤养分总体下降。同时系统分析土壤养分变异的驱动力,并有针对性的提出了提高土壤养分的对策和措施。

Investigation and analysis were conducted to study the variety cropland soil nutrients during 21 years(from 1981 to 2002) in Yucheng county. The result shows that the organic matter,total N and available K were increased 20%,30% and 16.4%,and the total P was decreased 42%.Most nutrients were increased on paddy field, and most nutrients were decreased on dry land. At the same time, the driving force of soil nutrients variation were find out. The measures that increase soil nutrients were put forward.