摘 要 ：以苏打盐渍土区典型退化湿地为研究区，运用经典统计学和地统计学相结合的方法研究了退化湿地盐碱化指标: 土壤电导率（EC）、盐分含量（SC）、pH和钠吸附比（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，EC、pH、SC具有强空间相关性， SAR空间相关性不明显。Kriging插值结果表明：EC、pH、SC空间分布在一定范围内均存在空间上的相似性。盐碱化指标与芦苇生长指标相关分析结果表明： EC与株高、覆盖度、生物量都呈显著性相关，因此在盐碱化指标中EC是影响芦苇生长最重要因素。当pH＞10.1、EC＞0.4 mS cm-1、SC＞4604 mg kg-1时，植被由芦苇群落过渡为碱茅+芦苇群落，且随着盐碱化指标升高，芦苇所占比例减小。该研究为苏打盐渍土区植被恢复和盐碱地利用提供依据。
Abstract:The spatial variability of soil salt content (SC), electrical conductivity (EC), pH and sodium adsorption ratio (SAR) was analyzed by using traditional statistics and geo-statistics in a typical degraded wetland of saline sodic soils. The results indicated that SC, EC and pH were strong, while SAR was weak, spatial autocorrelation resulting from compound impact of structural and stochastic factors．Kriging interpolation showed that the spatial distribution of SC, EC and pH was similar. There was a significantly negtive correlation between EC and plant height, coverage and dry biomass of Phragmites Australis. It indicated that the soil EC was the most important factor affecting the growth of Phragmites Australis in saline-sodic land. When pH＞10.1, EC＞0.4 mS cm-1 and SC＞4604 mg kg-1，the vegetation community was successed from Phragmites Australis to Puccinellia distans +Phragmites Australis, and the Phragmites Australis plants was decreased with the increase of soil salinity and sodicity. These results may serve for the restoration and utilization of saline-sodic land．