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引用本文:李文朝,陈开宁,吴庆龙,潘继征.东太湖水生植物生物质腐烂分解实验.湖泊科学,2001,13(4):331-336. DOI:10.18307/20010407
LI Wenchao,CHEN Kaining,WU Qinglong,PAN Jizheng.Experimental Studies on Decomposition Process of Aquatic Plant Material from East Taihu Lake. J. Lake Sci.2001,13(4):331-336. DOI:10.18307/20010407
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东太湖水生植物生物质腐烂分解实验
李文朝, 陈开宁, 吴庆龙, 潘继征
中国科学院南京地理与湖泊研究所, 南京 210008
摘要:
以东太湖挺水植物、浮叶植物、沉水植物优势种的茎叶为实验材料,并引入原位底泥中的微生物,在室内开展了为期1周年的水生植物生物质腐烂分解实验,对总重量以及碳、氮、磷的消减过程特征进行了分析研究.结果表明,浮叶植物腐烂分解速度快,周年腐烂分解率高;沉水植物初期腐烂分解速度较快,但周年腐烂分解率较低;挺水植物腐烂分解过程比较缓慢.挺水植物和浮叶植物生物质的周年腐烂分解率在70%以上,沉水植物则不到50%.在前期,水生植物生物质所包含的磷优先释放出来
关键词:  水生植物  腐烂分解  东太湖
DOI:10.18307/20010407
分类号:
基金项目:国家自然科学基金资助项目
Experimental Studies on Decomposition Process of Aquatic Plant Material from East Taihu Lake
LI Wenchao, CHEN Kaining, WU Qinglong, PAN Jizheng
Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China
Abstract:
Plant material decomposition experiment was carried out in room condition from 1998 to 1999 (lasted for 12 months) The plant material and top-layer sediment was collected from East Taihu Lake Jiangsu Province, China. Three ecotypes of aquatic plant were used:emerged plant (Zizania latifolia), floating-leafed plant (Nimphoides peltatum), and submerged plant (Vallisneria spiralis, Potamogeton maackianus) It resulted that, floatnig-leafed plant had the highest decomposition rate and annual reduction ratio. Submerged plant had high decomposition rate in the early stage and the lowest annual reduction ratio. The decomposition process of emerged plant was very lengthy. By the end of the experiment,more than 70% of the bio-mateiialwas reduced by decomposition for emerged and floating-leafed plan, but less then 50% for submerged plant. Phosphorus release was prior to TOC in the decomposition process. It means that most of the phosphorus in the plant material can be released to the water when aquatic plants die down in the winter Nitrogen was released from the plant material parallely to TOC reduction,and nitrogen content ratio in the plant material nearly kept constant in the decomposition process for emerged and floating-leafed plant.
Key words:  Aquatic plants  decomposition  Taihu Lake
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