连续曝气下河水水质及睡莲生理响应的季节变化  

Seasonal variation of river water qualities and physiological responses of Nymphaea tetragona L. under continuous aeration

作　　者：卢晓明[1] 张勇[2] 陈建军[2] 

机构地区：[1]温州科技职业学院生态环境研究所,温州325006 [2]华东师范大学资源与环境科学学院,上海200062

出　　处：《环境工程学报》2010年第9期1978-1984,共7页Chinese Journal of Environmental Engineering

基　　金：国家重大科技专项项目(2008ZX07317-006);上海市科委重点项目资助(062312019)

摘　　要：采取现场实验方法,在春、夏、秋三季测定了6个睡莲(Nymphaea tetragona L.)植物净化槽(曝气、非曝气)中睡莲的叶绿素(Chl)、可溶性蛋白(SP)含量与过氧化物酶(POD)、过氧化氢酶(CAT)活性,氮磷积累、生物量、根长、茎高、叶长、分蘖数、根密度等生物学指标及对应的水质常规理化指标,探讨了连续曝气下睡莲的生理响应及河水水质的季节变化。结果表明,连续曝气明显影响了睡莲的生理特性,导致净化槽中水质发生相应变化,且影响程度与睡莲生长状况的季节变化相关。曝气槽中睡莲植物的根长、茎高、叶长较短,叶片Chl-a、Chl-b、SP含量下降,而根组织POD、CAT活性升高,氮磷积累、生物量下降,分蘖数、根密度下降;春、夏季曝气对睡莲的影响相对较小,曝气槽中TN、NH4+-N浓度低于非曝气槽,而TP、溶解性P浓度明显升高;秋季曝气对睡莲的影响较严重,曝气槽中TN、NH4+-N、TP、溶解性P浓度均高于非曝气槽。研究结论为在污染河道生态修复工程实践中,针对水生植物生长状况的季节变化而进行曝气方式调节提供理论依据。With testing outside,Nymphaea tetragona L.plants were cultivated in 6 purifying-tanks（aeration and non aeration）,to investigate the plants＇ physiological characteristics and polluted water＇s physical and chemical qualities during spring,summer and autumn.The plants＇ biological indexes included chlorophyll（Chl） and soluble protein（SP） contents,peroxidase（POD） and catalase（CAT） activities,nitrogen（N） and phosphorus（P） accumulations and biomass,lengths of roots,stems and leaves,tillers and roots densities.Seasonal variations of physiological responses of the plants and water qualities under continuous aeration were analyzed.Results showed that continuous aeration significantly affected the plants＇ physiological characteristics,which resulted in water qualities in purifying-tanks varied.And the effects were correlated to the plants＇ seasonal growths.Roots,stems and leaves lengths of the plants under the aeration were shorter than the non aeration,respectively.Chl-a,Chl-b and SP contents of the leaves at the aeration decreased,while POD and CAT activities of roots tissues increased.N and P accumulations and biomass of the plants at the aeration decreased.Tillers and roots densities in the aeration tanks decreased too.In spring and summer,effects of aeration on the plants were comparatively less.TN and NH＋4-N concentrations at the aeration were lower than the non aeration,while TP and soluble P concentrations increased significantly.In autumn,effects of aeration on the plants became heavier.TN,NH＋4-N,TP and soluble P concentrations at the aeration were higher than the non aeration,respectively.This work provided theoretical evidences for regulating aeration techniques based on seasonal variations of aquatic plants＇ growths in the ecological restoration engineering of polluted rivers.

关 键 词：连续曝气 睡莲 生理响应 季节变化 

分 类 号：X173[环境科学与工程—环境科学]