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以贵州省安顺市西秀区旧州镇文星村为研究区域,采用地统计学方法,研究了黔中喀斯特山区土壤pH值、有机质、碱解氮、有效磷、速效钾、全氮、全磷、全钾、有效铜、有效锌、有效铁、有效锰和水稻产量的空间变异规律及其相互关系.结果表明:土壤pH值、碱解氮、有效磷、速效钾、全磷、有效铜及水稻产量构成因素的C0/(C0+C)<25%,表现为强烈的空间相关性,有机质、全氮、全钾、有效锌、有效铁、有效锰及水稻产量的C0/(C0+C)为25%~75%,具有中等空间相关性.土壤速效钾含量与水稻产量关系最为密切,偏相关系数达到极显著水平(r=0.4669,P<0.0001),土壤碱解氮、速效钾和有效磷对有效穗数和千粒重的直接通径系数均为正值,其大小顺序与偏相关分析结果一致.克里金插值结果表明,土壤有机质、碱解氮、速效钾、全氮、有效铜、有效锌的含量在研究区均存在从西南向东北逐渐递减的趋势;产量在西北部及东南部较高.
Taking Wenxing Village of Jiuzhou Town, Xixiu Dist., Anshun City, Guizhou Province as the research area, the geostatistics of soil pH, organic matter, available nitrogen, available phosphorus, available potassium and total nitrogen in the Karst mountain area of Guizhou Province were studied. Phosphorus, total potassium, available copper, available zinc, available iron, available manganese and rice yield.The results showed that soil pH, available nitrogen, available phosphorus, available potassium, total phosphorus, available copper And C0 / (C0 + C) <25% of the components of rice yield, which showed strong spatial correlation. The contents of organic matter, total nitrogen, total potassium, available zinc, available iron, available manganese and the yield of C0 / (C0 + C was 25% -75%, with moderate spatial correlation.The available potassium content in soil was the most closely related to rice yield, and the partial correlation coefficient reached the significant level (r = 0.4669, P <0.0001) And the direct path coefficient of available P to effective panicle number and 1000-grain weight were positive, and the order of their sizes was consistent with that of partial correlation analysis.The results of Kriging interpolation showed that soil organic matter, available nitrogen, available potassium and total nitrogen were effective Copper and available Zn both existed in the study area from southwest to east Gradually decreasing trend; yields higher in the northwest and southeast.