中文摘要：

经果林作为重要经济林林种，约占上海林地总面积1／5，在上海森林生态系统碳汇评价中占有重要地位。以上海分布面积较大的桃园和桔园生态系统为研究对象，构建了两个主要树种生物量和生产力方程，并对其植被层碳储量、土壤碳储量以及乔木层年净固碳量进行估测。结果表明，两个树种基径与生物量和生产力方程拟合效果均较好（R2〉0．9）；桃园与桔园生态系统平均碳密度分别为118．31和86．31t·hm-1，年平均净生产力分别为4．87和6．51t·hm-1·a-1，其中乔木层碳储量分别占13．4％和27．3％；草本层碳储量分别占1．O％和1．3％，土壤层碳储量（0～60cm）分布分别占85．6％和71．4％。

英文摘要：

As an important part of commercial forest, economic fruit forest occupies nearly one fifth of Shanghai＇ s total forest land area, playing an important role in the evaluation of carbon sink of forest ecosystems in Shanghai. Taking the peach orchard and citrus orchard ecosystems with large distribution areas in Shanghai as the objects, and based on the biomass investigation, the biomass and net productivity equations for the two main tree species in the orchard ecosys tems were established, and the carbon storage in the vegetation layers and soil as well as the an nual net carbon sequestration in tree layer was calculated. There was a good fitting effect of the established equations on the basal diameter of the two main tree species （ R2 〉0.9）. In the peach orchard and citrus orchard ecosystems, the carbon storage was averagely 118. 31 and 86.31 t. hm2, and the annual net productivity was averagely 4.87 and 6.51 t . hme . a-1 , respec tively. Among the carbon storage in the peach orchard and citrus orchard ecosystems, tree layer accounted for 13.4% and 27.3% , herb layer accounted for 1.0% and 1.3% , and soil accoun ted for 85.6% and 71.4%, respectively.