川中丘陵区紫色土微地形下有机质空间变异特征

Spatial Variability of Soil Organic Matter in Microtopography of Mid-Sichuan Hilly Region

通过实地调查、土壤采样分析和数理统计结合的方法,对川中丘陵区微地形下有机质空间变异特征作了分析。结果表明:在不同坡位之间表现为:丘脚>丘腰下部>丘腰上部>丘腰中部>丘顶。在不同坡形之间表现为:凹形坡>线形坡>凸形坡。在不同坡度之间,有机质含量随着坡度的增加而减少。在不同坡向之间,阴坡和半阴坡有机质含量高于阳坡。

By the method of soil sampling and laboratory analysis, analysis of spatial variability of soil organic matter in microtopography of Mid-Sichuan Hilly Region had been characterized discussed. The results indicated, that there was a tendency among different landscape position. The order is： foot slope 〉lower slope 〉upper slope 〉middle slope 〉hilltop. For slope shape, soil organic content order is：Plan-convex slope 〉plan-linear slope 〉plan-concave slope. Among different slopes, there was a tendency： with the increase of slope reduced soil organic matter content. There was little difference in soil organic matter among different slope aspects, but there was a tendency that soil organic matter in northern aspects was higher.