漂浮植物对入星云湖河水的净化效应分析
水葫芦(Eichharnia crassipes)和大薸(Pistia stratiotes)是当前星云湖沿岸池塘水生生态系统内较为典型的主要漂浮植物,为了探讨其对星云湖入湖河水氮磷等养分的净化效应,以期对星云湖的湖泊富营养化水体治理提供参考,采用室外调查与室内检测相结合、微区试验与大区定点(池塘区域)观测相结合的方法开展研究。结果表明,水葫芦和大薸2种漂浮植物对星云湖入湖河水的养分含量具有较好的吸收净化效果,而且净化效果表现出了不同的时间变化规律。水葫芦的冬前(10~11月采样)全株干重、N吸收量、P吸收量分别为2.60 kg/m^2、55.10 g/m^2、17.65 g/m^2,但经历冬...
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Published in | 西南农业学报 Vol. 27; no. 6; pp. 2580 - 2585 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
云南省玉溪市农业科学院,云南玉溪,653100
2014
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Subjects | |
Online Access | Get full text |
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Summary: | 水葫芦(Eichharnia crassipes)和大薸(Pistia stratiotes)是当前星云湖沿岸池塘水生生态系统内较为典型的主要漂浮植物,为了探讨其对星云湖入湖河水氮磷等养分的净化效应,以期对星云湖的湖泊富营养化水体治理提供参考,采用室外调查与室内检测相结合、微区试验与大区定点(池塘区域)观测相结合的方法开展研究。结果表明,水葫芦和大薸2种漂浮植物对星云湖入湖河水的养分含量具有较好的吸收净化效果,而且净化效果表现出了不同的时间变化规律。水葫芦的冬前(10~11月采样)全株干重、N吸收量、P吸收量分别为2.60 kg/m^2、55.10 g/m^2、17.65 g/m^2,但经历冬季后(次年2月28日采样)3者分别降为0.86 kg/m^2、19.43 g/m^2、6.17 g/m^2;同样,大薸的冬前全株干重、N吸收量、P吸收量分别为1.27 kg/m^2、19.34 g/m^2、4.48 g/m^2,冬季后3者分别降为0.61 kg/m^2、11.20 g/m^2、3.31 g/m^2;池塘内水溶性N和水溶性P的含量由冬前的3.09和0.402 mg/L提高到了10.05 mg/L和1.064 mg/L。净化效果的变化反映出了,在未打捞前提下,利用水葫芦和大薸净化富营养化水体会对入湖河水形成明显的次生污染,据此笔者提出了该生态系统的管理建议。 |
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Bibliography: | Floating plant; Xingyun lake; River water flowing to the lake; Purification effectiveness 51-1213/S YANG Shao-cong,LV Yan-ling,MU Chan,ZHANG Yan-jun,QIAN Rong-qing,LI Quan-qing,LI Xiao-liang(Yuxi Academy of Agricultural Sciences, Yunnan Yuxi 653100, China) To explore purification effectiveness of water hyacinth and water lettuce on river water flowing to Xingyun Lake in Yunnan Province,and to provide reference for eutrophication control,the study was conducted based on the methods consisting of field survey,indoor test,micro-plot trials and large area( ponds) of fixed-point observation. The results showed that high purification effectiveness occurred in water hyacinth and water lettuce; moreover,the wide temporal variations of purification effectiveness were determined. The values of total dry weight,nitrogen-absorption and phosphorus-absorption of water hyacinth were 2. 60 kg / m^2,55. 10 g/m^2 and 17. 65 g / m^2 before the winter( sampled from October to November),respectively,however,these respective values d |
ISSN: | 1001-4829 |
DOI: | 10.16213/j.cnki.scjas.2014.06.061 |