广东省不同林分土壤A层有机碳密度估算及其影响因素分析

采用重铬酸钾容量法测定广东省桉树林、马尾松林、杉木林、阔叶混交林、针阔混交林5种主要林分下的土壤A层有机碳密度。结果表明：5种林分土壤A层有机碳密度在2．38—122．85t／hm2，有机碳密度排列为阔叶混交林〉针阔混交林〉桉树林〉杉木林〉马尾松林；并对土壤A层有机碳密度的主要影响因素进行分析，为评价不同林分类型的碳汇功能提供参考。

Estimation on Soil Organic Carbon Density in Soil Layer A of Different Forest Stands and its Influencing Factors in Guangdong Province

The Chemical method was used in the estimation on the density of soil organic carbon in soil layer A of eucalyptus （Eucalyptus lanceolata）, the mixture of broadleaf spp.）, masson pine （Pinus massoniana）, Chinese fir （Cunninghamia and conifer-broadleaf forest stands. Studies showed that： layer A of soil organic carbon density was 2.38 - 122.85 t/hm-2 , the sequence as follows： mixed broadleaved forest 〉coniferous and broadleaved mixed forest 〉 Eucalyptus splx 〉 Cunninghamia lanceolata 〉 Pinus massonian~And the main factors of influencing the density of soil organic carbon were analyzed, in order to make a reference to the assessment of carbon reservoir in different forest stand types.