| 东太湖茭黄水发生原因与防治对策探讨 |
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| 引用本文： | 李文朝.东太湖茭黄水发生原因与防治对策探讨[J].湖泊科学,1997,9(4):364-368. |
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| 作者姓名： | 李文朝 |
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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： | 国家“八五”攻关课题!85－14－01－03－02 |
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| 摘 要： | 东太湖茭草分布面积３５．４７ｋｍ＾２。年生长量１２７６００ｔ,利用率９．７％,残留量高达１１５２０４ｔ,。折合单位湖面干物质残留量１７７４ｇ／ｍ＾２。这些茭草残体遇高温时迅速腐烂分解,向湖水中释放大量有机污染物质和氮,磷等生物元素、引起水质腐败,腐烂后的茭草残骸沉积在湖底,加速了湖泊的淤积变浅。
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| 关 键 词： | 东太湖 茭草 茭黄水 污染防治 湖泊 氮 |
| 收稿时间： | 6/5/1996 12:00:00 AM |
| 修稿时间： | 1997/2/24 0:00:00 |
Yellow water in east Taihu Lake caused by Zizania latifolia and its prevention |
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| Li Wenchao.Yellow water in east Taihu Lake caused by Zizania latifolia and its prevention[J].Journal of Lake Science,1997,9(4):364-368. |
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| Authors: | Li Wenchao |
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| Institution: | Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008 |
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| Abstract: | In the period from 1992 to 1993. field surveys were carried out in East Taihu Lake on the distribution. productivity and harvest of emerged macrophyte Zizania latifolia. At the same time,the sediment in the distributing zone of the plant was sampled at 15 points. the depth of saft mud was measured and the sediment samples of differet depth were analyzed on the contents of nitrogen, phosphorous and organic carbon. Experimental study was proceeded to reveal the decaying process of the plant material and its pollution to the water.About 35. 47km2 of the lake surface of East Taihu Lake was covered by an emerged plant species Zizania latifolia. Its net productivity was 127 600 t/a(fresh weight). Only 9. 7% of the product was harvested and 115 204t of the product was left in the lake. It added 1774g dry plant materiel to every square meter of lake bottom. In the beginning of next summer when the water temperature went up, the remained plant materiel fell into decay and caused serious secondary-pollution to the lake water, forming "Yellow Water". After one year's decaying. large amount of the indecomposable vascular skeleton of Zizania latifolia was left and became the component of the sediment.Intensive harvest of Zizania latifolia may, to a certain extent, resist "Yellow Water" in the lake, but the best measure is to replace it with submerged plant. |
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| Keywords: | East Taihu Lake Zizania latifolia "Yellow Water" prevention |
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