淮安市耕层土壤有机质变化规律的研究

Study of Soil Organic Matter Changes in Huaian City

[目的]为全面、准确地掌握淮安市土壤有机质变化规律。[方法]应用统计学方法对淮安市27个土壤肥力监测点历年耕层土壤有机质含量进行分析，掌握全市土壤肥力长期定位监测点有机质含量的时空变化。[结果]1982～2008年土壤有机质含量平均值大幅上升，增加83．2％，平均年递增2．87％；2009后土壤有机质含量增长放缓并趋于平衡，各类土壤有机质含量提升至最高点后基本稳定于22．1～23．7g/kg之间。[结论]该研究可为土壤肥力评价和耕地质量管理提供科学依据。

[ Objective ] The research aimed grasp the change law of soil organic matter in Huaian City completely and accurately. [ Method] Soil organic matter contents in the topsoil of the 27 soil fertility monitoring point were studied with statistical methods. And the main change trend of soil organic matter was monitored. [ Result ] In 1982 - 2008, the average content of soil organic matter rose significantly, increased by 83.2% and the average annual increase was 2.87%. After 2009, soil organic matter content was in growth and balance. All kinds of soil or- ganic matter content increased to the highest point, and then in basic stability between 22.1 -23.7 g/kg. [ Conclusion] The research could provide a scientific basis for soil fertility evaluation and management.