3种水生植物铅积累及运移差异性研究  

A study on Pb enrichment and transfer characteristics in three aquatic plants

作　　者：郭晖 靳筠 庄静静 GUO Hui;JIN Jun;ZHUANG Jingjing(College of Life Science and Technology,Xinxiang University,Xinxiang 453003,China)

机构地区：[1]新乡学院生命科学技术学院,河南新乡453003

出　　处：《河南农业大学学报》2019年第2期227-235,共9页Journal of Henan Agricultural University

基　　金：河南省科技攻关项目(182102110031);新乡市科技攻关项目(CXGG17016)

摘　　要：通过盆栽试验,设置对照组(未添加铅)、低质量浓度(200 mg·kg^(-1))和高质量浓度(500 mg·kg^(-1)) 3个铅污染水平,研究3种水生植物对不同质量浓度铅污染土壤的净化能力。结果表明,(1)在铅污染处理下,3种水生植物长势良好,说明其对铅污染土壤具有一定的耐性。在低质量浓度铅污染下,花叶芦竹和石菖蒲的地上部分生物量有增加趋势,起促进生长的作用;在高质量浓度铅污染下,3种水生植物地下部分生物量有所下降,表现出抑制作用。(2)在不同质量浓度铅污染下,随着铅质量浓度的增加,铅在3种水生植物体内含量分布的趋势为:地下部分>地上部分。(3)在对照组和高质量浓度铅污染下,花叶芦竹和水生鸢尾的转运系数均> 1;在高质量浓度铅污染下,二者的富集系数也均> 1。由于花叶芦竹的地上部分和地下部分的转运系数、富集系数效率高,且在生物量、适应性等方面具有优势,因此,结合花叶芦竹在园林景观中的效果,可以作为铅污染修复的潜在物种。Three aquatic plants of macrophytes species,Arundo donax,Acorus tatarinowii and Iris tectorum Maxim.were treated with three different concentrations of lead pollution (T ck :No addition of lead as the control group,T z:200 mg·kg^-1,as the group of low mass concentration of lead pollution,and Tg:500 mg·kg^-1,as the group of high mass concentration of lead pollution) to study their capacity of purifying soil polluted by different concentrations of lead.The results showed that:(1) three aquatic plants grew well in the lead polluted soil,indicating that they have a certain tolerance to lead.Under the low mass concentration of lead pollution,the above ground biomasses of Arundo donax and Acorus tatarinowii showed an increasing trend.Under the high mass concentration,the underground biomass of the three aquatic plants all decreased.(2) Under different concentrations of lead pollution,the distribution of lead content in three aquatic plants is:underground>aboveground.(3) Under the control group and high mass concentration group,the transfer coefficients of Arundo donax and Iris tectorum Maxim.were>1;under high mass concentration,the enrichment coefficients were>1.Arundo donax not only has a high transfer coefficient and enrichment factor of the aboveground and underground,and it has advantages of biomass and adaptability.Therefore,considering the effect of Arundo donax in garden landscape,it can be used as a potential species for lead pollution restoration.

关 键 词：铅污染 水生植物 生物量 转运系数 富集系数 

分 类 号：X173[环境科学与工程—环境科学]