生物炭对苏丹草吸收Cd、Pb的影响

发布时间：2018-01-03 18:01

本文关键词：生物炭对苏丹草吸收Cd、Pb的影响　出处：《干旱区资源与环境》2017年05期 　论文类型：期刊论文

更多相关文章： 生物炭 苏丹草 重金属 累积特征

【摘要】：为了探讨生物炭添加对苏丹草吸收Cd、Pb的影响,在灰漠土中外源添加不同浓度的Cd和Pb,在此基础上添加5~20g/kg生物炭,通过盆栽试验研究生物炭对Cd、Pb在苏丹草中的分布及累积特征的影响。结果表明:添加生物炭和低浓度重金属能促进苏丹草的生长,使根、茎、叶生物量显著增加(P0.05),但高浓度重金属的添加会抑制苏丹草的生长。在低中浓度重金属Cd-Pb的处理下,添加5~20g/kg生物炭,Cd在苏丹草根、茎、叶中质量分数、富集系数、转移系数及地上部分的累积量均呈降低趋势,Pb则相反。说明了生物炭的添加能抑制低中浓度Cd在苏丹草中的迁移。在高浓度重金属Cd-Pb的作用下添加生物炭对Cd和Pb在苏丹草中迁移均有抑制作用。
[Abstract]:In order to study the effect of biochar addition on the absorption of CD ~ (2 +) Pb by Sudan grass, different concentrations of CD and Pb were added to the grey desert soil with different concentrations of CD and Pb, and on this basis, 5g / kg biochar was added. Pot experiment was conducted to study the effect of biochar on the distribution and accumulation characteristics of CDB in Sudan grass. The results showed that the addition of biochar and low concentration of heavy metals could promote the growth of Sudan grass and cause the growth of roots and stems. Leaf biomass increased significantly (P 0.05), but high concentrations of heavy metals inhibited the growth of Sudan grass. Under the treatment of low and medium concentration of heavy metal Cd-Pb, 5% 20 g / kg biochar was added. CD content in root, stem and leaf, enrichment coefficient, transfer coefficient and accumulation of aboveground part were decreased. The addition of biochar can inhibit the migration of CD in Sudan grass with high concentration of heavy metal Cd-Pb, and the addition of biochar can inhibit the migration of CD and Pb in Sudan grass. For production.
【作者单位】：新疆农业大学草业与环境科学学院;
【基金】：新疆维吾尔自治区研究生科研创新项目(XJGRI2015082) 土壤学新疆重点学科(XJ-201103) 国家自然基金项目(31560171)资助
【分类号】：Q945;X173
【正文快照】： 重金属Cd和Pb是五毒重金属中的2种元素,对作物具有较强的毒性,是引起作物减产及品质下降的因素之一[1,2]。Cd进入人体积累到一定量将导致高血压,引起心脑血管疾病,破坏骨骼和肝肾,并引起肾衰竭[3]。Pb一旦进入人体将很难排除,能直接伤害人的脑细胞,特别是胎儿的神经系统,可造

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