内蒙古地区草地表层土壤容重空间格局分析
发布时间:2018-10-08 13:37
【摘要】:本文以内蒙古地区草地表层土壤容重调查测定数据为基础,结合遥感和气候多重数据,进行草地土壤容重与海拔、年均气温、年均降雨、≥10℃积温、湿润度和NDVI等6个生态要素之间的回归分析。根据回归拟合方程,借助ArcGIS平台进行单因素插值,并通过插值预测结果与实测数据的拟合程度进行各因素对土壤容重影响的权重分析,加权叠加并综合插值出内蒙古草地土壤容重1km×1km栅格的空间分布图。结果表明:内蒙古地区草地土壤容重平均值为1.45g·cm~(-3),其中温性荒漠类草地的土壤容重最大,为1.58g·cm~(-3),温性草甸草原类土壤容重最小,为1.27g·cm~(-3);空间格局上,草地表层土壤容重自东向西方向呈现由低到高逐渐递增的趋势。综合插值得到的内蒙古草地表层土壤容重空间格局图,通过预测值与实测值之间的复相关性检验,其复相关系数R2=0.6739,均方根误差(RMSE)为0.1424g·cm~(-3),总体偏差为9.77%,平均预测精度达90.23%。综合空间插值结果较好地反映了内蒙古地区土壤容重空间分布情况,与土壤类型和草地类型的分布基本吻合。
[Abstract]:Based on the investigation and measurement data of the surface soil bulk density in Inner Mongolia region, combined with remote sensing and climate data, the soil bulk density and elevation, average annual air temperature, annual rainfall, accumulated temperature 鈮,
本文编号:2256945
[Abstract]:Based on the investigation and measurement data of the surface soil bulk density in Inner Mongolia region, combined with remote sensing and climate data, the soil bulk density and elevation, average annual air temperature, annual rainfall, accumulated temperature 鈮,
本文编号:2256945
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