【作者】 周卫军； 黄利红； 田珂； 李江林； 薛涛；

【Author】 HUANG Li-hong~1 ZHOU Wei-jun~1 Tian Ke~1 Li Jiang-lin~2 Xue Tao~1 (1.College of Resources and Environment,Hunan Agricultural University,Changsha 410128; 2.Liling County Agricultural Bureau,Liling 412200)

【机构】 湖南农业大学资源环境学院； 湖南省醴陵市农业局；

【摘要】 土壤肥力变异研究可以为精准农业的土壤养分管理提供依据。本文利用 GIS 技术研究了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,得出主要结果如下: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】 The spatial and temporal change of cultivated soil quality was studied in Liling county of Hunan province,based for the management of the soil nutrition in precision agriculture.The results showed:the a- vailable nitrogen nugget was largest.The substrate effect of the pH,available nitrogen,soil available phos- phorus 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 availa- ble phosphorus was fast.According to the research of temporal variations stability,the soil pH was gener- ally 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 insta- bility(UIII level).更多还原