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采用析取克立格法开展海涂围垦区耕地土壤电导率三维空间变异性及其作物种植风险评价研究。将各深度土层的土壤电导率插值结果、大于一定阈值的条件概率分布结果切片进行叠加,可直观的表达土壤电导率的三维空间变异规律及作物种植风险的三维分布图。考虑表层土壤盐分的影响,研究区种植水稻的高风险区域面积比例为65.01%;考虑0.55 m深度以上土层电导率的影响,则种植棉花的高风险区域为0;若考虑0.55 m以下深度土层盐分的影响,研究区完全不适宜种植水稻;种植棉花的高风险区域面积比例也逐渐增大。进一步考虑深层土壤盐分的影响,可进一步提高种植决策的准确性。
Using extracted Kriging method to conduct three-dimensional spatial variability of soil electrical conductivity and assessment of crop planting risk in the coastal reclamation area. The soil electrical conductivity interpolation results of each depth soil layer and the conditional probability distribution result slices which are more than a certain threshold are superposed, which can intuitively express the three-dimensional spatial variation law of soil electrical conductivity and the three-dimensional distribution map of crop planting risk. Considering the effect of surface soil salinity, the area of high-risk area for planting rice in the study area is 65.01%. Considering the influence of soil conductivity above 0.55 m depth, the high-risk area for planting cotton is 0; if depth soil 0.55 m is considered, Layer salinity, the study area is totally unsuitable for planting rice; and the proportion of high-risk area planting cotton is gradually increasing. Further consider the impact of deep soil salinity can further improve the accuracy of planting decision-making.