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杉木林采伐迹地的土壤有机碳分配特征
卢广超,薛晔,薛立,邵怡若
0
(华南农业大学林学院,广州 510642;浙江工业大学,杭州 310023)
摘要:
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。
关键词:  土层  坡位  土壤有机碳  杉木林  采伐迹地
DOI:
基金项目:广东省林业局资助项目“财政支持公益林森林生态效益补偿机制问题研究”资助。
Distribution characteristics of soil organic carbon in cutover land of a Cunninghamia lanceolata stand
LU Guangchao,XUE Ye,XUE Li,SHAO Yiruo
(College of Forestry, South China Agricultural University, Guangzhou 510642;Zhejiang University of Technology, Hangzhou 310023)
Abstract:
Taken cutover land of a Cunninghamia Lanceolata stand as the research object, soil organic carbon in upper, middle and lower slope positions, 0-20 cm, 20-40 cm and 40-60 cm soil layers was studied. The results showed that soil organic carbon content in all soil layers was in the order of lower slope > middle slope > upper slope, and it decreased with increasing soil depth at each slope. The order of the soil organic carbon density was lower slope > middle slope> upper slope, and it decreased with increasing soil depth at each slope. The soil organic carbon density of 0-20 cm soil layer was 1.37 times and 1.78 times of 20-40 cm and 40-60 cm soil layers, respectively.
Key words:  soil layer  slope position  soil organic carbon  Cunninghamia lanceolata stand  cutover land

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