Study on Soil Carbon Variability under Different Environmental Conditions in Guangdong
To provide a theoretical basis for forest soil carbon pool management and improving the ability to adapt to and cope with climate change,the 0-100 cm soil layer of wetland ecosystem(Futian mangrove plot in Shenzhen),terrestrial ecosystem(Chenhedong natural forest plot,Yue shan forest farm ecological restoration plot,and Camellia osmantha new planting plot)were studied.The soil organic carbon content,organic car-bon density and vertical distribution characteristics of four ecosystems were compared and analyzed.The results showed that the average soil bulk density in 0-100 cm soil layer of four typical forests was 0.994-1.421 g·cm-3,the organic carbon content was 4.42-29.43 g·kg-1,and the organic carbon density was 0.42-2.53 kg·m-2.The soil bulk density,soil organic carbon and soil carbon density of ecosystems with different site conditions varied with depth.The maximum soil bulk density of wetland ecosystem appeared in 50-60 cm,and the maximum soil bulk density of terrestrial ecosystem appeared in 20-40 cm.The soil carbon density of wet-land ecosystem increased first(0-60 cm)and then decreased(60-100 cm)with the increase of soil depth,while the soil carbon density of terrestrial ecosystem decreased with the increase of soil depth.Soil bulk density increases with depth within a certain range,and remains relatively stable beyond this range.Soil organic carbon content decreased with the increase of soil depth.The soil carbon content of wetland ecosystem was significantly higher than that of terrestrial ecosystem(P<0.05),and the soil carbon content of artificial restoration forest was higher than that of natural forests.The soil carbon density of terrestrial ecosystems decreased with the in-crease of soil depth,and moderate human disturbance helped to increase soil carbon density.
typical forestsoil physicochemical propertiessoil carbon storageGuangdong province
NETL
NSTL
万方数据
