醴陵休耕区稻田土壤养分综合评价

Comprehensive Assessment of Soil Nutrients for Paddy Field in Fallow Area around Liling

为了探明醴陵市休耕区稻田土壤养分状况,为后续休耕及治理措施提供参考,选取醴陵市休耕区18个样点,进行实地采样和室内理化检测,并采取主成分分析法对土壤养分状况进行综合评价。结果表明:醴陵市休耕区土壤p H值均值为5.50,总体为偏酸性土壤;土壤有机质、全氮、有效磷含量较为丰富;但速效钾及缓效钾含量处于中等水平,略有不足;大部分土壤有效钙含量偏低,处于缺钙状态;土壤有效镁含量适中;土壤微量元素有效铜及有效锰含量过高。主成分分析显示,醴陵休耕区稻田较肥沃土壤点位占50.0%,对其采取保育措施;50.0%的土壤点位养分水平较低,需通过种植绿肥、深耕、排滞等措施对土壤质量进行有效提升。

In order to find out the soil nutrient status of the paddy field in the fallow area of Liling City and provide reference for the subsequent fallow and control measures, 18 samples from the fallow area of Liling City were selected for on-site sampling and indoor physical and chemical testing. The method of principal component analysis was used to comprehensively evaluate the soil nutrient status. The result showed that the average soil p H value in the fallow area of Liling City was 5.50, which was generally acidic soil. The soil organic matter, total nitrogen and available phosphorus were abundant, but the available potassium and slow-acting potassium were at medium level, slightly insufficient. The available calcium content of soil is low and it is in the state of calcium deficiency, the effective magnesium content in the soil is moderate, and the effective copper and manganese content of soil trace elements are too high. Principal component analysis showed that the paddy field in Liling fallow area accounted for 50.0% of the fertile soil and the conservation measures were adopted.50.0% of the soil fertility level was low and the quality of soil needed to be effective improved by the measure of planting green manure, deep tillage and transport perched water.