作　　者： ; ;

机构地区： 华东师范大学资源与环境科学学院地理学系

出　　处： 《中国生态农业学报》 2008年第2期269-272,共4页

摘　　要： 湿地生态系统具有很强的储碳、固碳能力，在全球碳循环中占有重要地位。为了解长江口典型湿地芦苇（Phragmites australis）的储碳、固碳情况，通过实地调研与实验室测定相结合的方法，研究了崇明东滩芦苇带湿地植被的生物量和初级生产力，并测算了其碳储量和固碳能力。结果表明：长江口典型芦苇带湿地植被的碳储量较大，为2．66～5．74kg·m^-2，平均4．02kg·m^-2，且地下部分的生物现存量大于地上部分，地下／地上生物量比率为2．33～3．64，平均2．96，碳储量是地上部分的近3倍；长江口典型芦苇带湿地具有很强的固碳能力，达1．11～2．41kg·m^-2·a^-1，是全国陆地植被平均固碳能力的2．3～4．9倍，全球植被平均固碳能力的2．7～5．9倍。 Wetland ecosystems have strong ability for carbon storage and fixation,and play important roles in the global carbon cycle. To understand carbon storage and fixation conditions of Phragmites australis in the typical wetland ecosystem of Changjiang River Estuary,on-spot investigation was conducted on P. australis biomass and net primary productivity, followed by laboratory measurements. In accordance with the theory of photosynthesis, carbon storage and fixation by P. australis in the wetland were estimated. Resuhs show a very large P. australis carbon storage in the typical wetland ecosystem of Changjiang River Estuary （2.66 ～5.74 kg· m^-2 ） ,at an average of 4.02 kg·m^-2. Root biomass is larger than shoot biomass, and the ratio is about 3 （2. 33- 3.64, at an average of 2.96）. Thus root carbon storage is about 3 times that of shoot. A typical wetland like that of Changjiang River Estuary has a strong carbon fixation ability, 1.11 ～ 2.41 kg·m^-2· a^-1 ; and can be 2.3～4.9 times of the average carbon fixation of terrestrial vegetations in China,and 2.7 ～5.9 times of that of the world.

关 键 词： 长江口 芦苇 储碳 固碳 湿地植被

领　　域： [理学] [理学]