| 杭州西湖沉积物的若干物理和化学性状 |
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| 引用本文： | 李震宇,朱荫湄,王进.杭州西湖沉积物的若干物理和化学性状[J].湖泊科学,1998,10(1):79-84. |
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| 作者姓名： | 李震宇 朱荫湄 王进 |
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| 作者单位： | 中国科学院南京地理与湖泊研究所!南京210008 |
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| 基金项目： | “八五”攻关课题!8－14－01－03－02 |
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| 摘 要： | 水生植物在浅水湖泊中具有净化水质，保护生态环境，生产植物产品等生态功能，同时也有加速湖泊淤浅，引起水质污染等环境负效应，通过对植被结构的调整和利用方式的改进可以优化其生态功能，东太湖水生植物覆盖率９７％，年产量１１２０３２５ｔ，吸收同化氮３９１６ｔ，磷４８６，年收获利用水生植物５００２９５ｔ，带走氮１８９１ｔ，磷２９６ｔ，相当于东太湖年外源氮，磷输入量的２８％和５７％；但每年仍有５２１０３０ｔ ｒ
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| 关 键 词： | 东太湖 水生植物 生态功能 调控机制 湖泊 |
| 收稿时间： | 1996/11/4 0:00:00 |
| 修稿时间： | 1997/6/28 0:00:00 |
Some Physical and Chemical Characteristics of Sediment in West Lake, Hangzhou |
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| Li Zhenyu,Zhu Yinmei and Wang Jin.Some Physical and Chemical Characteristics of Sediment in West Lake, Hangzhou[J].Journal of Lake Science,1998,10(1):79-84. |
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| Authors: | Li Zhenyu Zhu Yinmei and Wang Jin |
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| Institution: | Enuironmental Monitoring Center, Zhejiang Province, Hangzhou 310012,Department of Enuironmental Science, ZAU, hangzhou 310029 and Hangzhou Enuronmental Monitoring Station, Hangzhou 310006 |
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| Abstract: | In shallow lakes, aquatic plants play very improtant roles in primary production and environmental protection. On the other hand, it can also cause silting-up by adding large amount of plant material to the lake bottom and release pollutant to the lake water when it dies and decnys. The functions of aquatic plants can be regulated reasonably by manipulating the structure and species composition of aquatic vegetation of the lake. In East Taihu Lake, more than 97% of the lake surface was covered by aquatic plants, which absorbed 3916t nitrogen and 496t phophorous from the lake in a year to produce 1120325t plant biomass (fresh weight). About 599295t plant bioamss was harvested from the lake to remove 1981t nitrogen and 296t phosphorous, equal to 28% of the external nitrogen load to remove 57% of the external Phophorous load of the lake. There was still 521030t plant biomass remained and decayed in the lake which caused serious water pollution and siliting-up of the lake basin. Elndea Nuttallii was introduced to the lake in 1986 and transplanted on a large scale in the past ten years. About 50000ot of Elodea Nuttallii were harvested as fish fodder in 1993. An experiment was carried out successfully to replace Zizania latifolia in the lake with submerged plants. There are still a lot to do to complete the task of reasonable requlation. |
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| Keywords: | East Taihu Lake aquatic plant ecological function regulation |
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