A Study on the Soil Carbon Storage of Some Land Use Types in Heshan, Guangdong, China

In order to find the relationship between land use and soil carbon sequestration, especially the influence of vegetation rehabitation, these indices including some of related chemical characteristics such as soil organic matter, total nitrogen, were studied in this paper. The results showed that: among the different land use, it had different soil carbon storage. All the test plots, the forest soil, orchard soil or the grassland soil, which the content of soil organic carbon (SOC) decreased with the increase of soil depth, and the content of SOC in different land use at the same depth was generally in order: forest soil orchard soil grassland soil. The variation tendency of total nitrogen content was the same as soil carbon content. The ratio of C/N was 10 or so. According to the calculation, for the different soil bulk density, soil organic carbon storage of forest land, orchard land and grass land reached 125.82t·hm -2 , 74.66 t·hm -2 and 88.53 t·hm -2 with the three kinds of land use, respectively. As the results, expanding afforestation and forest protection were effective measures to mitigate the rising of CO 2 in atmosphere.