Soil Organic Carbon And Its Relationship With Soil Properties In Phyllostachys Forests

With the deepening of the research of global change, as the largest terrestrial ecosystem carbon pool,the forest had been received more and more attention. Phyllostachys owing to its unique characteristics such as biology, ecology, will be a constant increase of carbon, sustainable development strategy in China is playing an increasingly important role. Therefore, this study selected five different altitude Phyllostachys forest plots,in DaGang mountain forest area,Through the analysis of soil organic carbon content, organic carbon density and the soil physical and chemical properties,to explore the soil organic carbon and other soil properties in different layers,different altitudes,different time in Phyllostachys forest.And further the study had researched soil organic carbon content, soil organic carbon density and soil properties of the relationship using mathematichal methods such as correlation analysis, stepwise regression analysis.The results were as follows:Phyllostachys forests Soil organic carbon content, organic carbon density, soil chemical properties are obvious vertical variation and seasonal change regularity in Phyllostachys forests,they were all significantly reduced with the increase of depth of soil.But different elevations of soil organic carbon content reduced at different levels,surface soil organic carbon content with altitude change was 300m>700m>400m>600m>500m, and there were significant differences; At all levels of soil organic carbon content and soil chemical indicators of content emerged in March> November> August; Changes of soil organic carbon density along altitudinal gradients were the same as changes of soil organic carbon content in 0～20cm,but the lower showed the variation of different.Between the lower soil density at different altitudes were no significant differences,and it was different from changes of organic carbon density; Soil physical properties are all decreased with soil depth,surface and the others had significant differences, but the capillary porosity of layers was no significant difference.Obtained by correlation analysis, soil organic carbon content was showed a significant or significant positive correlation to natural water content, field capacity, saturated water, capillary water holding capacity, non-capillary porosity, degree of soil aeration, total nitrogen, available nitrogen, available phosphorus, rapidly available potassium, the correlation of chemical properties is more larger,and the maximum amount of nitrogen related coefficient; Soil organic carbon density was showed significant positive correlation to organic carbon, total nitrogen, available nitrogen, available phosphorus, rapidly available potassium, and was showed significant negative correlation to soil density, The biggest influence to content of soil organic carbon in Phyllostachys forests was total nitrogen,Content of soil available phosphorus was less influenced than total nitrogen, The third impact is the capillary porosity. The biggest influence to soil organic carbon density was organic carbon content,the next was total nitrogen,and content of soil available phosphorus was also influenced soil organic carbon density.