中文摘要：

研究不同植被生态系统的碳汇,有助于对区域碳汇功能的了解。在样地调查的基础上,研究了广州城区万亩果园的主要植被生态系统的植被和土壤碳汇。结果表明：主要植被生态系统单位面积碳汇依次为果园复合湿地（10.41t/（hm2·a））〉果园（9.93t/（hm2·a））〉绿地（8.53t/（hm2·a））〉农田（7.91t/（hm2·a））。果园复合湿地、果园以及绿地生态系统碳汇主要来源于植被,而农田生态系统植被和土壤碳汇能力相当。万亩果园的植被单位面积碳汇量不但比国内外其他城市的森林植被高,也远高于广州市森林的单位面积碳汇（2.90 t/（hm2·a））,表明以果树为主的城市植被万亩果园具有较高的碳汇水平。

英文摘要：

The study on carbon sink in different ecological systems can promote the understanding of carbon sink in various areas. This study dealt with the carbon sink of vegetation ecosystems in the thousand-acre orchard of Guangzhou proper based on the survey of vegetation plots and soil. The results showed that the carbon sink per unit area of the main vegetation ecosystems were in a descending order from orchard-wetland（10.41 t/（hm2·a））, orchard（9.93 t/（hm2·a））,green space（8.53 t/（hm2·a））to farm land（7.91 t/（hm2·a））. The vegetation carbon sink played the most important role in orchard-wetland, orchard and green space. But in farm land, the vegetation carbon sink was nearly the same as the soil carbon sink. The carbon sink of vegetation ecosystem in the thousand-acre orchard was larger than that in forests of other cities. It was also much higher than forests in Guangzhou. This showed that the urban vegetation as the thousand-acre orchard, where fruit trees had been mainly planted,had relative high carbon sink.