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当前位置: 首页 > 文章 > 水花生投放密度对富营养化湖水净化效果影响的试验研究 海洋湖沼通报 2008 (4) 51-57
Position: Home > Articles > EXPERIMENTS ABOUT THE IMPACT OF THROW-IN DENSITY OF ALTERNANTHERA PHILOXEROIDES ON THE PURIFYING EFFECTS ON EUTROPHIC LAKE WATER Transactions of Oceanology and Limnology 2008 (4) 51-57

水花生投放密度对富营养化湖水净化效果影响的试验研究

作  者：
朱泽聪;胡春华;胡维平
单  位：
中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室
关键词：
水花生;投放密度;净水效果;自屏效应
摘  要：
为了研究水花生在不同投放密度下净化富营养化湖水的效果,在太湖梅梁湾进行了多种密度水花生放养试验。结果表明:夏季高温条件下,低屏密度时水花生去除水体中总氮(TN)、总磷(TP)及悬浮物(SS)的效果较明显,水花生初始投放密度为2 kg/m2和4 kg/m2时,TN最大去除率分别为26.4%和38.4%;TP最大去除率分别为45.3%和32.9%;SS最大去除率分别为44.5%和81.4%。而在初始投放密度为6 kg/m2和8 kg/m2的条件下,植株自屏效应使得水花生生物量增长率低,水体净化效果不明显,易产生二次污染。因此,夏季利用水花生进行水体生态修复时,需要控制合理的初始投放密度(以2~4 kg/m2为宜),并定期收割以控制其植株密度(低于6 kg/m2)。
译  名：
EXPERIMENTS ABOUT THE IMPACT OF THROW-IN DENSITY OF ALTERNANTHERA PHILOXEROIDES ON THE PURIFYING EFFECTS ON EUTROPHIC LAKE WATER
作  者：
ZHU Zecong,HU Chunhua,HU Weiping(1.Nanjing Institute of Geography and Limnology,Chinese Academy of Science,Nanjing 210008,China;2.Graduate School,Chinese Academy of Science,Beijing 100049,China)
关键词：
Alternanthera philoxeroides;throw-in density;purifying effect;shielding effect
摘  要：
Experiments were carried out in Meiliang Bay of Lake Taihu to study the purifying effects of Alternanthera philoxeroides with different throw-in density for eutrophic lake water.It was found that Alternanthera philoxeroides cultured in low-shield density had great effects on removing total nitrogen(TN),total phosphorus(TP) and suspended solids(SS) in midsummer days.The maximal removal rates of groups with initial throw-in density of 2 kg/m2 and 4 kg/m2 were 26.4% and 38.4% for TN,45.3% and 32.9% for TP,44.5% and 81.4% for SS respectively.However,the plant cultured in high-shield density(6 kg/m2 and 8 kg/m2) had low biomass grow rate and little purification effect owing to shielding effect,being prone to cause second-pollution.The result presented completely showed that when using Alternanthera philoxeroides for aquatic ecological rehabilitation in eutrophic lakes in summer,it is necessary to control rational initial density(2～4 kg/m2)and harvest periodically to control plant density(under 6 kg/m2).

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