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《Journal of Forest and Environment》 2017-01
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Comparison of ecosystem carbon density between Quercus aliena var.acuteserrata and Quercus variabilis forest

HU Wenjie;WANG Xiaorong;CUI Hongxia;PAN Lei;PANG Hongdong;ZHENG Lanying;Hubei Academy of Forestry;  
Quercus aliena Bl. var. acuteserrata Maxim. ex Wenz.(RCHL) and Quercus variabilis Bl.(SPL) are the main constructive species of natural Quercus forests in the west of Hubei province. Comparing the carbon density distribution characteristics of these two forests is important to estimate forest carbon sinks of natural Quercus forests. Based on the field measurement,the carbon density characteristics between RCHL and SPL forests were systematically compared in the layer of arbor,shrub,litter and soil according to the forest carbon reserve estimation method provided by IPCC. The results showed that the ecosystem carbon density of RCHL and SPL forests in west Hubei was 183.68 t·hm-2and 150. 61 t·hm-2,respectively. And the allocation patterns of carbon density of the two Quercus existed remarkable difference. The proportion of arbor,shrub,litter and soil layers in ecosystem was53.17%,1.34%,0.64% and 44. 85% for RCHL and 35. 27%,0. 76%,1. 50% and 62. 47% for SPL. In general,the ecosystem carbon density of RCHL is larger than of SPL,the former gave priority with arborous layer,while the latter took advantage on soil layer; carbon sequestration capability of RCHL was better than that of SPL,however,the SPL can generate more litter and the proportion of the soil carbon density in ecosystem decreased with the growth of forest. Elevation and stand density were the main factors which caused the carbon density difference between the arborous layers; latitude determined the carbon density of soil layers; and youth forests were the main component of Quercus forests,in western Hubei,which has a great carbon sequestration potential.
【Fund】: “十二五”农村领域国家科技计划课题“三峡库区典型防护林结构调控与定向经营技术研究”(2015BAD07B0403);; 神农架国家森林生态定位站;; 三峡库区(秭归)国家森林生态定位站
【CateGory Index】: S792.18
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