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应用地统计学和GIS空间分析技术,对丘陵山区水田土壤有效铜和有效锌进行了空间变异特征和空间插值质量研究。研究区有效铜、锌均表现为中等空间变异性,其变异系数的大小为有效铜>有效锌。各向同性下,有效铜和有效的空间变异均存在着良好的半方差结构,其含量的空间自相关距离均大于采样间距,表明研究区土壤养分在区域范围内均存在着空间相关性,块金系数介于25%～50%,说明土壤有效铜和有效锌均具有明显的空间自相关性,其空间变异主要是由结构性和随机性因素共同作用的结果。各向异性结构明显,有效铜在西北-东南方向上的空间变异最大,有效锌在东北-西南方向上空间变异最小。水田土壤有效铜含量丰富,大于1.8 mg.kg-1的水田面积约占所有水田面积的83.3%;土壤有效锌含量,主要分布在1.0～2.0 mg.kg-1之间,约占所有水田面积的79.6%。
The geostatistics and GIS spatial analysis techniques were used to study the spatial variability and spatial interpolation quality of available copper and available zinc in paddy soils in hilly and mountainous areas. Available copper and zinc showed moderate spatial variability in the study area, and the coefficient of variation was effective copper> available zinc. Isotropy, available copper and effective spatial variability all have good semi-variance structure, the content of the spatial autocorrelation distance is greater than the sampling interval, indicating that the study area of soil nutrients in the region within the scope of the existence of spatial correlation, the block The gold coefficient ranged from 25% to 50%, indicating that there was a significant spatial autocorrelation between soil available copper and available zinc. The spatial variability was mainly due to the combination of structural and random factors. The anisotropic structure is obvious, the spatial variability of available copper in the northwest-southeast direction is the largest, and that of available zinc in the northeast-southwest direction is the smallest. The paddy field soil is rich in available copper, and the paddy field area of more than 1.8 mg.kg-1 accounts for 83.3% of the total paddy field area. The available zinc content of soil is mainly distributed in the range of 1.0-2.0 mg.kg-1, Of 79.6%.