不同生物质炭对酸雨及氧化性沉降下花生生长及累积砷镉的影响

发布时间：2018-03-15 02:30

本文选题：生物质炭　切入点：酸雨沉降　出处：《环境科学学报》2017年11期 　论文类型：期刊论文

【摘要】：通过温室盆栽试验,研究了普通生物质炭和铁基生物质炭对酸雨及氧化性沉降下不同生育期花生生长及累积砷、镉(As、Cd)的影响.结果表明,酸雨及50μmol·L-1H2O2沉降处理对处于花期及成熟期中花生的生物量、根瘤数和瘤干重的影响不显著(p0.05),但却显著增加了花生籽粒中Cd的含量和花生壳中As的含量(p0.05).其中,铁基生物质炭可显著降低酸雨及氧化性沉降下花生地上部、根部、籽粒、壳中累积As、Cd含量(p0.05),且作用效果明显强于普通生物质炭.由此可知,酸雨及氧化性沉降增加了花生对土壤重金属As、Cd的富集,而施加铁基生物质炭可有效降低作物的As、Cd累积,为有效防控酸雨及氧化性沉降区域的花生砷、镉重金属污染具有重要现实意义.
[Abstract]:The effects of common biomass carbon and iron based biomass carbon on the growth and accumulation of arsenic and cadmium in peanut at different growth stages under acid rain and oxidizing deposition were studied by pot experiment in greenhouse. The effects of acid rain and 50 渭 mol 路L -1 H _ 2O _ 2 deposition on peanut biomass, root nodule number and nodular dry weight were not significant (p 0.05), but significantly increased CD content in peanut grain and as content in peanut shell. Iron based biomass carbon can significantly reduce the accumulation of As-CD in the aboveground, root, grain and shell of peanut under acid rain and oxidizing deposition, and the effect is obviously stronger than that of common biomass carbon. Acid rain and oxidizing deposition increased the enrichment of soil heavy metal As-CD in peanut, while the application of iron based biomass and carbon could effectively reduce the accumulation of As-CD in crops, which was an effective way to control the arsenic of peanut in acid rain and oxidizing deposition area. Cadmium heavy metal pollution has important practical significance.
【作者单位】：华南农业大学农业部华南热带农业环境重点实验室;广东省现代生态农业与循环农业工程技术研究中心;华南农业大学资源环境学院;
【基金】：国家高新技术研究发展(863)计划项目(No.2013AA102402) 广东省科技计划项目(No.2015A020208012,2016A020210036,2015B090903077) 广州市科技计划项目(No.201510010260)~~
【分类号】：S565.2;X173

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