基于空间插值技术和辅助信息的吉林省玉米土地生产潜力研究

为提高作物生产潜力估算精度,利用GIS技术,将作物生产力逐步衰减模型与ArcGIS空间分析中GRID建模相结合,建立了作物生产潜力模型,并利用空间插值技术和辅助信息对估算光温-气候-土地生产潜力所需的气象和土壤要素等进行了重点模拟.其中,采用多元回归+残差内插方法,对吉林省气象站点观测的温度和降水数据进行了空间模拟；将...

Study on land productivity potential of maize in Jilin Province based on spatial interpolation technique and auxiliary information

In this study, by using spatial analysis function of ArcGIS software, a crop productivity potential model originally from an attenuation model has been developed to assess maize land productivity potential in Jilin Province located in northeast China. Moreover, spatial interpolation technique and auxiliary information are used for spatial modeling of key climate and soil conditions, which are required in simulating light and temperature potential productivity. First, temperature and precipitation data observed from climate data stations in Jilin are interpolated by using an integrated means of multiple regression and residual error interpolation. Second, with a consideration of soil type information, the relevant factors are utilized as co factors for interpolating soil properties (i.e. soil pH, soil organic matter, available K, alkali hydrolyzable N and available P) by using the means of Cokriging technique. Finally, based on temperature, moisture and soil correction coefficients, the maize land productivity potential in Jilin are reclassified and zoned into different yield levels.