This study employed field investigation,sample collection and laboratory analysis to investigate the spa-tial characteristics of the soil characters in Karayulgun River Valley of Tomur National Nature Reserve.The results shows that:① The average proportion of typical soil particle size <0.01 mm in brown soil,mountain brown soil and mountain chestnut soil in the study area were 23.75%,49.83%,60.95%,respectively.The average ratio of the particle size of<0.001 mm were 12.50%,18.79%,22.39%;As the altitude increases,the ratio of soil particle size in the southern slope of mount Tomur was constantly growing.There was a significant positive correlation between soil moisture and alti-tude.② Cl-,SO2-4,Ma2+and K++Na+had a higher coefficient of variation above 1.0,indicating a strong varia-tion.③ In addition to total P,the organic matter,total N,and the C/N belong to medium variation.The organic matter has the highest coefficient of variation of 0.54.The coefficient of variation of whole P was only 0.09,being the weakest variable.Correlation analysis showed that the altitude,organic matter,total N,total P,C/N of each index content had significant positive correlation,but were negatively correlated with pH.%通过野外调查、样品采集及实验室分析,对托木尔峰自然保护区喀拉玉尔滚河上游河谷土壤理化性状空间特征进行分析.结果表明:① 研究区棕漠土、山地棕钙土、山地栗钙土粒径<0.01 mm的土壤含量占比分别为23.75%、49.83%、60.95%,粒径<0.001 mm的占比分别为12.50%、18.79%、22.39%,随着海拔的升高,托木尔峰地区南坡土壤颗粒度趋于细化;不同类型土壤的含水量存在较明显的差异,土壤含水率与海拔之间存在极显著的正相关.② 研究区不同海拔高度表层土壤全盐、Cl-、SO2-4 、Mg2+及K++Na+含量的变异系数大于1.0,属强变异;pH值、HCO-3及Ca2+含量的变异系数小于1.0,pH值的变异系数极小,仅为0.02,属弱变异;土壤盐渍化类型以硫酸盐及偏硫酸盐渍土为主,土壤盐渍化程度以极轻或轻度为主;③ 研究区表层土壤各养分指标中,除全P外,有机质、全N、C/N均属中等变异,有机质的变异系数最高,为0.54,全P的变异系数仅为0.09,变异性最小;海拔、有机质、全N、全P、C/N之间皆呈极显著正相关(P<0.01),都与pH值之间呈极显著负相关(P<0.01).
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