作　　者： ; ; (朱剑云）; (莫罗坚）; (叶永昌）; (吕浩荣）; (刘颂颂）;

机构地区： 广东省东莞市林业科学研究所广东东莞523106

出　　处： 《广东林业科技》 2011年第2期22-29,共8页

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973.05×104 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161.48×104 t,平均碳密度为33.21 t.hm-2;凋落物碳储量为21.98×104 t,平均碳密度为4.29 t.hm-2;土壤有机碳储量为789.70×104 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。 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× 104 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.

关 键 词： 森林生态系统 碳储量 碳密度 东莞

领　　域： [生物学]