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精准农业技术的应用越来越受到大家的关注,通过对一个地块土壤养分进行详细栅格采样化验分析,利用反距离法和克里格(Kriging)两种不同计算机插值方法对土壤中各种营养元素进行了分析研究。在采样栅格大小不同的条件下,随机选择5个采样点插值,分析对比了5个采样点在不同栅格采样条件下利用两种插值方法的插值结果。通过插值计算得到土壤中全氮、速效氮和速效磷在采样栅格较小的情况下,由于反距离法考虑的周围点数较多,插值点处的插值误差要较克里格插值总体上来讲误差小,而随着采样栅格距离的加大,克里格插值的误差要小于反距离法插值的误差。
The application of precision agriculture technology has drawn more and more attention from all people. Through a detailed raster sampling analysis of soil nutrients in a plot, two different computer interpolation methods, ie inverse distance method and Kriging method, Nutritional elements were analyzed. Under the condition of different sampling grid sizes, five sampling points were chosen at random, and the interpolation results of five interpolation points under different grid sampling conditions were analyzed and compared. When the sampling grid is small due to the calculation of total nitrogen, available nitrogen and available phosphorus by interpolation, the interpolation error at the interpolation point is more important than the interpolation by the kriging method due to the large number of surrounding points considered by the inverse distance method The error is small, but with the increase of sampling grid distance, the error of interpolation is smaller than that of inverse distance method.