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东莞森林生态系统碳储量研究
朱剑云1, 莫罗坚1, 叶永昌1, 苏志尧2, 吕浩荣1, 刘刚2, 刘颂颂1
1.东莞市林业科学研究所;2.华南农业大学
摘要:
采用2 km×2 km的UTM网格取样法对广东省东莞市8个主要森林类型的植被碳库、凋落物碳库和土壤碳库等三大碳库的有机碳储量和碳密度进行了计量、比较分析和评价。结果表明：东莞森林碳储量总量为973.05×104 t，森林总平均碳密度为175.86 t·hm-2；其中森林植被总碳储量为161.48×104 t，平均碳密度为33.21 t·hm-2；凋落物碳储量为21.98×104 t，平均碳密度为4.29 t·hm-2；土壤有机碳储量为789.70×104 t，平均碳密度为138.90 t·hm-2。凋落物、植被、土壤三者碳储量之比约为1∶7∶36。8个主要林型中，总碳储量最大的是果林，阔叶混交林次之，竹林最小；各林型总碳储量由大到小顺序为果林>阔叶混交林>桉树林>相思林>针叶林>针阔混交林>疏林及灌木林>竹林。总平均碳密度最大的是阔叶混交林，最小的是竹林，总平均碳密度由大到小顺序为阔叶混交林>桉树林>针阔混交林>相思林>针叶林>果林>疏林及灌木林>竹林。东莞森林总平均碳密度低于全国平均值，但高于珠三角地区的平均碳密度。
关键词:  森林生态系统〓碳储量〓碳密度〓东莞
DOI：
分类号:
基金项目:东莞市科技计划项目“东莞市森林生态系统碳储量及其碳汇技术研究”资助。
Study on Carbon Storage of the Forest Ecosystem in Dongguan
zhujianyun,moluojian,yeyongchang,suzhiyao,luhaorong,liugagn,liusongsong
Abstract:
By using the 2 km UTM grid square sampling method, carbon storage and density were estimated and assessed by means of vegetation layer, litter layer and soil layer among eight major forest types in Dongguan city, Guangdong province. The results were summarized as follows: the total carbon storage of forest ecosystem in Dongguan was estimated as 973.05× 104 t, with average carbon density of 175.86 t·hm-2. Carbon storage of forest vegetation layer, litter layer and soil layer was estimated as 161.48× 104 t, 21.98× 104 t, and 789.70× 104 t, respectively, with the average carbon density of 33.21 t·hm-2, 4.29 t·hm-2, and 138.90 t·hm-2, respectively. The ratio of the carbon storage among litter layer, vegetation layer and soil layer was approximately 1∶7∶36. Among the eight major forest types, the fruit bearing forest had the greatest carbon storage, next came the broad leaved mixed forest and the bamboo grove. The total carbon storage among forest types was fruit bearing forest > broad leaved mixed forest> eucalyptus plantation >acacia plantation > coniferous > broadleaf conifer mixed forest > sparse woodland and shrubland> bamboo grove. For average carbon density of the forest ecosystem, broad leaved mixed forest remained at the highest level, but the bamboo grove at the lowest. Average carbon density among forest types was broad leaved mixed forest > eucalyptus plantation > broadleaf conifer mixed forest> acacia plantation > coniferous > fruit bearing forest > sparse woodland and shrubland > bamboo grove. Dongguan own a higher forest carbon density level as compared with other cities in the Pearl River Delta, but lower than the national level.
Key words:  forest ecosystem, carbon storage, carbon density, Dongguan