中文摘要：

本文报道了广州市常绿阔叶林和果园生态系统碳储量及其分配特征,并探讨了常绿阔叶林转为果园对生态系统碳储量的影响。常绿阔叶林和果园生态系统碳储量分别为241.91和161.47 t·hm-2,其中植被碳储量分别为136.40和77.20 t·hm-2,土壤碳储量（0～100 cm）分别为103.99和83.12 t·hm-2。土壤碳储量的主要差异在表层,常绿阔叶林和果园0～40 cm土层碳储量占土壤总碳储量的比例分别为67%和56%。常绿阔叶林的植被碳储量高于土壤和枯枝落叶碳储量,果园的植被碳储量与土壤碳储量相当。若常绿阔叶林转为果园,生态系统碳储量减少80.44 t·hm-2,从数量和比例上,植被碳储量损失的程度均大于土壤。广州市常绿阔叶林生态系统碳储量接近鼎湖山的顶极地带性植被生态系统碳储量,保护常绿阔叶林生态系统将有利于维持区域较高的碳储量。

英文摘要：

This paper reports the characteristics of ecosystem carbon storage and its distribution in mature evergreen broad-leaved forest and orchard, and the effects of transformation from forest to orchard on the ecosystem carbon stock. The ecosystem carbon storage in evergreen broad- leaved forest and orchard was 241.91 and 161.47 t· hm-2, while the vegetation carbon storage was 136.40 and 77. 20 t·hm-2, and soil carbon storage （0-100 cm） was 103.99 and 83.12 t·hm-2 respectively. The difference in soil carbon storage between evergreen broad- leaved forest and orchard mainly centralized in the surface soil. The proportions of carbon storage in the upper 40 cm soil to that in the whole soil in evergreen broad-leaved forest and orchard were 67% and 56% , respectively. The carbon storage of vegetation was higher than that of soil and litter in evergreen broad-leaved forest. The vegetation carbon storage was very close to soil carbon storage in orchard. After the conversion of evergreen broad-leaved forest to orchard, an 80.44 t· hm-2 decrease of ecosystem carbon storage was found ; from the viewpoint of both amount and proportion, the degree of the carbon storage loss was higher in vegetation than in soil. Ecosystem carbon storage in mature evergreen broad-leaved forest in Guangzhou was close to that in ever- green broad-leaved forest in Dinghushan Biosphere Reserve that stands for the climax zonal vegetation. Protecting evergreen broad-leaved forest will be beneficial to maintain the higher regional carbon storage.