Effects of Slope Position and Aspect on Humus Component and Organic Matter of the Synthetic Soil on the Rock Slope

Effects of slope position and aspect on humus component and organic matter on the rock slope near the Suiyu railway was studied,and set the natural slope as control.The results showed that:The SOM and fulvic acid content of rock slope followed the law of mid-slopetop-slopebottom-slope.Humic acid content followed mid-slopebottom-slopetop-slope.Humic acid ratio followed mid-slope=bottom-slopetop-slope.The organic matter content of rock slope soil was lower than that of natural slope on the same position.In addition,both rock slope and natural slope had highest fulvic acid content in mid-slope.Among the different rock slope aspects,the humic acid content in synthetic soil of west slope was significantly lower than that of east slope,south slope and north slope.But there were no significant differences among east slope,south slope and north slope.Humic acid ratio followed the law of south slope=north slopeeast slopewest slope.And there was no significant difference among fulvic acid content of different slopes.The analysis of correlation indicated that humic acid or fulvic acid content were significant positive correlated with physical or chemical properties of soil,so there was a close relationship between them.