摘要
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。
Precision Agriculture （PA） techniques have been focused on by farmers gradually. Soil samples from a detailed grid sampling field were analyzed and the tested results were used for interpolating the removed data usmg inverse distance weighted（IDW） and kfiging interpolation respectively, five sampling sites were selected randomly and analyzed at different grid scale,and their interpolation results were compared by using two kinds of interpolations. The interpolation errors of total nitrogen, available nitrogen and available phosphorus for IDW were smaller than Kriging. However, with the increasing of grid scale the interpolation error of IDW becomes bigger than Kriging interpolation.
出处
《土壤通报》
CAS
CSCD
北大核心
2005年第6期826-830,共5页
Chinese Journal of Soil Science
基金
上海科技攻关项目(03dz19302)
国家高技术研究发展计划项目(2003AA209080)资助
关键词
精准农业
土壤采样
插值分析
Precision agriculture
Soil sampling
Interpolation
