The Study on Characteristics of Soil Carbon Content in Different Vegetation Types in Xinglong Mountains Nature Reserve
This study focused on the characteristics of soil carbon content of different vegetation types(alpine meadow,shrub,larch plantation)in Xinglongshan National Nature Reserve,Gansu.The contents of soil total carbon(TC),soil organic carbon(SOC)and soil inorganic carbon(SIC)in 0-60 cm soil layer were analyzed by diagonal five point sampling method.The results showed that SOC accounted for a large proportion of soil TC content in all vegetation types,and the content was the highest in 0-20 cm soil layer,which decreased with the increase of soil depth.Among different vegetation types,the contents of TC and SOC in larch plantations were generally higher than those in alpine meadows and shrubs,indicating that larch plantations contributed significantly to soil carbon storage.The SIC content of shrub in 0-40 cm soil layer is higher,while the SIC content of Larch Plantation in the whole soil layer is relatively stable.This study emphasized the impact of different vegetation types on soil carbon storage function in the nature reserve,and provided a scientific basis for assessing ecosystem carbon cycle and formulating protection measures.
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