【摘要】 土壤肥力质量变异研究可以为精准农业的土壤养分管理提供依据.利用GIS技术研究醴陵市耕地土壤肥力的空间变异特征和时间稳定性变异特征,得出如下结论:土壤碱解氮的块金值最大;土壤pH、碱解氮、有效磷和速效钾的拟合理论模型均为指数模型;土壤pH、碱解氮、有效磷和速效钾的基底效应均在25%～75%之间;土壤pH降低,碱解氮、有效磷和速效钾的含量均提高,其中pH下降的速度和有效磷提升的速度最快;土壤pH值在时间变异稳定性研究中属于中等稳定的MI级,土壤碱解氮属于中等稳定的MIII级,土壤速效钾和速效磷属于不稳定的UIII级.更多还原

【Abstract】 This paper study the changed characteristics of cultivated soil quality in space and time of Liling county, based for the management of the soil nutrition in precision agriculture. The main results included that the available nitrogen nugget was largest; The substrate effect of the pH, available nitrogen, soil available phosphorus and available potassium was from 25% to 75%; the soil pH decreased, while the available nitrogen, soil available phosphorus and available potassium improved, where the speed of the pH and the soil available phosphorus was fast; according to the research of temporal variations stability, the soil pH of Liling was generally the middle-class stability MI level; the soil available nitrogen was generally the middle-class stability MIII level, while the available potassium and available phosphorus was generally the middle-class instability UIII level.更多还原