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在黄河三角洲北部刁口黄河故道盐碱地设置一条南北土壤样带,采用地统计学方法分析土壤养分指标(有机质、全氮、有效磷、速效钾)和全盐含量的空间分布规律及其影响因素.结果表明:研究区土壤有机质、全氮、有效磷、速效钾和全盐含量的块金系数分别为0.38、0.40、0.50、0.32和0.34,5个土壤指标均具有中等的空间相关性;样带上土壤有机质和全氮含量的分布趋势基本一致,土壤速效钾与全盐含量的分布具有很强的相关性,土壤有效磷含量呈波动式的空间分布.综合土壤有机质和全盐含量,将样带土壤划分为盐大肥低型、盐大肥高型、盐小肥高型3种类型.研究区各土壤指标的空间分布格局与成土母质、土地利用方式、距海距离、道路阻隔等因素密切相关.
A north-south soil sample was set up in the saline-alkali soil of the Old Course of the Yellow River in Diaokou in the northern Yellow River Delta. Spatial distribution and its influencing factors of soil nutrient indicators (organic matter, total nitrogen, available phosphorus, available potassium) and total salt content were analyzed by geostatistics. The results showed that the nugget coefficients of soil organic matter, total nitrogen, available phosphorus, available potassium and total salt in the study area were 0.38, 0.40, 0.50, 0.32 and 0.34, respectively. Soil organic matter and total nitrogen content of the distribution trends are basically the same, soil available potassium and total salt content of the distribution has a strong correlation, soil available phosphorus content showed a volatile spatial distribution of soil organic matter and total salt content, the sample The soil is divided into three types: salt fertilizer type, salt fertilizer type and salt fertilizer type. The spatial distribution pattern of each soil index is similar to that of soil parent material, land use pattern, distance to the sea, road block Factors are closely related.