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以杉木林采伐迹地为对象,比较上坡、中坡和下坡的土壤碳分配以及0~20 cm、20~40 cm和40~60 cm土层的土壤碳垂直分布,研究了不同坡位和土层对固碳功能的影响。结果表明,采伐迹地各土层的有机碳含量均为下坡>中坡>上坡,各坡位的土壤有机碳含量均随土层深度的增加而减少。土壤有机碳密度为下坡>中坡>上坡,随土层加深而减少,0~20 cm土层有机碳密度分别为20~40 cm和40~60 cm土层的1.37倍和1.78倍。
Taking the Cunninghamia lanceolata forest cuttings as the object, the soil carbon distribution in the uphill, mid-slope and downhill as well as the vertical distribution of soil carbon in 0 ~ 20 cm, 20 ~ 40 cm and 40 ~ 60 cm soil layers were studied. Effect of Soil Layer on Carbon Sequestration. The results showed that the organic carbon content of all the soil layers in the deforested area was downhill> mid-slope> uphill, and the soil organic carbon content of each slope decreased with the increase of soil depth. Soil organic carbon density is downhill> mid-slope> uphill, and decreases with soil depth. Organic carbon density in 0-20 cm soil layer is 1.37 times and 1.78 times higher in 20-40 cm and 40-60 cm soil layers, respectively.