以松嫩平原西部具有典型微地形变化的苏打盐渍土小区为试验区,运用经典统计学和地统计学相结合的方法研究了小区盐碱化指标土壤电导率(EC)、盐分含量(SC)、pH和SAR的空间变异特征,绘制了4种指标的空间分布图。结果表明:受结构性因素和随机性因素的共同作用,4种指标均具有强空间相关性。4种指标空间分布在一定范围内均存在空间上的相似性。四种指标与相对高程呈极显著相关,相对高程在40cm范围内,四种指标随着相对高程的增加,呈二次函数曲线增加趋势。该研究为苏打盐渍土区植被恢复和盐碱地利用提供依据。
Soil salinity content(SC), electrical conductivity(EC), pH, SAR were studied and analyzed by using statistics and geo-statistics in saline-sodic soil land in the West of Songnen Plain.The result indicated SC, EC, SAR, pH were strongly spatial autocorrelation resulting from compound impact of structural factors.The spatial distribution maps of interpolated by Kriging interpolation showed apparently that the spatial distribution of SC, EC, SAR and pH were similar.Through Peason correlation,the result showed four indexs of salinity and alkalization were significant correlation with relative height.With increasing of relative height, four indexs were increased based curve of quadratic objective function.So salinity and alkalization was mostly controlled by microtopography in saline-alkali land.The research results can serve as a theoretical and technical basis for vegetation restoration and utilization of saline soils in the saline-alkali land.
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