Correlation among aspect and slope position,vegetation coverage,soil moisture content,organic matter were analyzed through field survey sampling and laboratory experiment in Ili Valley in the hope of providing sustainable utilization of land resources and effective measurement of soil and water conservation.The results showed that there was obvious difference in vegetation coverage of upper,middle and lower positions under effects of terrain and soil properties (P<0.05).And correlation analysis showed vegetation coverage,the content of organic matter and clay had extremely significant positive correlation in slope positions(P<0.01).Distribution of organic matter content was influenced by correlation of terrain and vegetation,with obvious difference of content of organic matter in slope positions.The content of organic matter and clay had extremely significant positive correlation (P<0.05),but extremely significant negative correlation with sand and soil erodibility factor K (P<0.01).Vegetation coverage also impacted the content of organic matter and soil mechanical composition.Soil erodibility factor K,vegetation coverage,the content of organic matter,soil bulk density,sand and clay were significantly correlated (P<0.05).Meanwhile,the integrated effects of terrain,vegetation and soil properties gradually decreased from top to bottom along the slope.%通过野外实地调查采样并结合室内实验,分析新疆伊犁河谷坡向与坡位、植被覆盖度、土壤含水量与有机质含量等之间的相互关系.结果表明:地形和土壤性质影响植被覆盖度,上、中、下坡位之间植被覆盖度存在明显的差异性(P<0.05),相关分析表明坡位之间植被覆盖度与有机质含量、黏粒呈极显著正相关(P<0.01).地形和植被的相互关系影响有机质含量的分布,使得有机质含量在不同坡位之间存在明显的差异性(P<0.05),其与黏粒呈极显著正相关(P<0.01),而与砂粒和土壤可蚀性K值呈极显著负相关,植被对有机质含量与土壤机械组成也会产生影响.土壤可蚀性K值与植被覆盖度、有机质含量、土壤容重、砂粒、黏粒呈显著性相关(P<0.05),其受地形、植被与土壤性质三者的综合影响沿坡面从上至下逐渐变小.
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