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混合浮床对南海湖湿地富营养化水体修复的作用
王志超1, 王智超1, 缪晨霄1, 杨文焕1, 于玲红1, 张明钰2, 宋嘉乐2, 李卫平1
1.内蒙古科技大学 能源与环境学院, 内蒙古 包头 014010;2.包头南海子湿地保护区管理处, 内蒙古 包头 014010
摘要:
[目的]探究植物的交互作用对生态浮床去除N,P效率的影响,为后期南海湖湿地规模化建设提供理论依据。[方法]在自然开放水域条件下,选取适合于北方生长的3种挺水植物水葱、千屈菜、风车草为浮床植物,以高密聚乙烯空心塑料基盘为植物载体,建立单一种植与交叉混合种植两种浮床体系,在南海湖湿地保护区进行为期90 d的水质处理,研究植物生长特性及浮床净化效果。[结果]10月份收割时,混合浮床中水葱和风车草的分蘖数分别达26和30株,生物量(鲜重)分别为1.43和1.98 kg/株。风车草浮床N累积量最好,达110.6 g/m2,水体TN去除率34.9%。混合浮床P累积量最好,达26.02 g/m2,水体TP去除率43.3%。[结论]植物的交互作用对植株的分蘖繁殖有一定促进作用,但不改变植物自身N,P吸收能力,植物体对N,P的累积量受生物量影响较大,3种植物在混合浮床中的整株N,P累积量要高于单植物浮床,混合浮床可作为针对南海湖富营养化水体修复的浮床形式推广使用。
关键词:  南海湿地  混合浮床  交互作用  富营养
DOI:10.13961/j.cnki.stbctb.2019.04.019
分类号:X524
基金项目:内蒙古自然科学基金项目"混合浮床对南海湖湿地富营养化水体修复的研究"(2018LH04002);内蒙古科技创新引导项目(KCBJ2018033);包头科技计划重点领域技术攻关项目(2017Z1009-1);包头市南海湿地管理处科研项目(NH2018003);内蒙古自治区高等学校科学研究项目(NJZY19132)
Restoration Effects of Eutrophic Water in Nanhai Lake Wetland by Mixed Plant Ecological Floating Island
Wang Zhichao1, Wang Zhichao1, Miao Chenxiao1, Yang Wenhuan1, Yu Linghong1, Zhang Mingyu2, Song Jiale2, Li Weiping1
1.School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China;2.Baotou Yellow River National Wetland Park Management Office, Baotou, Inner Mongolia 014010, China
Abstract:
[Objective] The interaction of plants on the removals of N and P efficiency by ecological floating bed was studied to provide a theoretical basis for the large-scale construction of Nanhai Lake wetland in the later period.[Methods] Under the condition of natural open water, three kinds of water-stained plants, Scirpus validus, Lythrum salicaria, and Cyperus alternifolius, which are suitable for growth in the north, were selected as floating bed plants, and high-density polyethylene hollow plastic substrates were used as plant carriers, to establish two kinds of floating bed systems of single planting and mixed planting in the Nanhai Lake Wetland Reserve for 90 days of water treatment to study plant growth characteristics and floating bed purification effects.[Results] At the time of harvest in October, the number of tillers of Scirpus validus and Cyperus alternifolius in the mixed floating bed reached 26 and 30, respectively, and the biomasses (fresh weight) were 1.43 kg/plant and 1.98 kg/plant, respectively. The cumulative amount of Scirpus validus grass floating bed N was the best, reaching 110.6 g/m2, and the water body TN removal rate was 34.9%. The cumulative amount of mixed floating bed P was the best, reaching 26.02 g/m2, and the water body TP removal rate was 43.3%.[Conclusion] The interaction of plants can promote the tillering of plants, but it does not change the N and P absorption capacity of plants. The accumulations of N and P in plants were greatly affected by biomass, and the individual accumulations for the three plants in mixed floating bed were greater than those in single floating bed. The mixed floating bed can be used as a floating bed for the restoration of eutrophic water in Nanhai Lake.
Key words:  Nanhai Lake  mixed floating beds  interaction  eutrophication