沉水植物菹草对富营养化水体中TN生态效应及模型研究  

Ecological effect of submerged plant Potamogeton crispus on TN in eutrophic water body and its model

作　　者：尹传宝[1] 张敏[1] 张翠英[1,2] 倪振威[1] 黄燕清[1,3] 刘自强[1] 

机构地区：[1]徐州工程学院环境工程学院,江苏徐州221111 [2]中国矿业大学环境与测绘学院,江苏徐州221116 [3]徐州工程学院信电工程学院,江苏徐州221111

出　　处：《生态科学》2015年第1期129-134,共6页Ecological Science

基　　金：国家住房和城乡建设部科学技术计划项目(2012-K-79);国家级大学生创新创业训练计划项目(201311998017);江苏省高校自然科学基金项目(13KJD610003);徐州市科技计划项目(XM12B087)

摘　　要：通过室内模拟构建水体营养盐和菹草生物量正交试验,研究菹草从石芽萌发至菹草植株衰亡腐烂整个生命周期中,对水体中TN的生态效应,并以此为依据建立菹草对富营养化水体生态效应模型。研究表明:在不同生物量菹草作用下,富营养化水体中TN含量是先下降后上升的一个周期式过程;在相同营养水平条件下,菹草对TN的吸收量随菹草生物量的增大而依次递增,而在相同生物量的前提下,菹草对TN的修复力存在一个最佳营养水平范围,即13.95—20.56 mg·L^(–1)之间;菹草对富营养化水体生态效应模型分两部分:菹草对富营养化水体中TN与时间关系模型以及菹草生态修复水体TN限度理论模型,通过这两个模型的构建可以为生产实践中菹草在生态修复富营养化水体的投放量和菹草的最佳收割时间提供有力依据,为工程实践提供有效保障。Through the laboratory construction of nutrient salts and Potamogeton crispus biomass of orthogonal experiment, it studied the ecological effect of P crispus on water TN during the period of turion germination to plants rot decay, and then its model was established. Research shows that due to the different biomass ofP. crispus function, TN content in eutrophic water was first decreased and then increased. In the same nutrient levels in each group, the uptake of TN was increased by increasing biomass, while at the same biomass in each group, there was an optimum nutrient level between 13.95-20.56 mg.L-1 for the reparation of TN The ecological effect model could be divided into two parts： the relationship of P. crispus on TN and time model, and ecological restoration of water body TN limit theory model. This model is helpful for the ecological restoration, and it can provide effective protection for engineering practice.

关 键 词：沉水植物 菹草 生态效应 模型 

分 类 号：X5[环境科学与工程—环境工程]