文章摘要
张世杰, 樊利敏, 陈苗苗, 薛培英, 刘文菊.叶面喷施硅调理剂对水稻砷累积及其赋存形态的影响[J].水土保持学报,2019,33(4):364~369
叶面喷施硅调理剂对水稻砷累积及其赋存形态的影响
Effects of Foliar Silicon Conditioner on the Accumulation and Speciation of Arsenic in Rice Seedlings
投稿时间:2019-01-17  
DOI:10.13870/j.cnki.stbcxb.2019.04.051
中文关键词: 叶面施硅  水稻  硅调理剂  砷形态
英文关键词: foliar application of silicon  rice  silicon conditioner  arsenic speciation
基金项目:国家自然科学基金项目(41471398)
作者单位E-mail
张世杰1, 樊利敏1, 陈苗苗2, 薛培英1, 刘文菊1 1. 河北农业大学资源与环境科学学院, 河北省农田生态环境重点实验室, 河北 保定 071000

2. 河北农业大学科学技术研究院
, 河北 保定 071001 
liuwj@hebau.edu.cn 
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中文摘要:
      采用营养液培养生物学模拟方法,研究了喷施8种不同的叶面硅调理剂对苗期水稻累积总砷(As)和砷形态的影响。结果表明,叶面施用硅调理剂可降低水稻根和茎叶中砷含量,其中叶面施用Na2SiO3+鼠李糖脂处理(Si6)的水稻根系和地上部砷含量最低,分别为10.04,0.31 mg/kg,比对照降低25.35%和33.10%(P<0.05);水稻中砷的赋存形态主要为As (Ⅲ),喷施该叶面硅调理剂减少水稻地上部和根系As (Ⅲ)含量,降幅分别为27.74%和21.50%(P<0.05);综合考虑水稻根系和地上部砷累积及砷由根系向地上部的转运,对不同的叶面硅调理剂处理进行聚类分析发现,喷施Na2SiO3+鼠李糖脂的处理为水稻砷低积累类群。因此,生物表面活性剂鼠李糖脂与含硅溶液配施是抑制水稻幼苗吸收和积累砷效果最好的叶面硅调理剂,可为我国砷污染区稻米生产安全提供技术支撑。
英文摘要:
      Biological simulation of the hydroponic experiment was conducted to explore the effects of spraying eight different foliar silicon solutions on total arsenic (As) accumulation and As speciation in rice seedling. The results showed that the application of foliar silicon conditioner reduced As content in rice roots and shoots. Moreover, As contents in roots and shoots of rice seedlings treated with Na2SiO3+rhamnolipid (Si6) were the lowest, 10.04 mg/kg and 0.31 mg/kg, respectively, which were 25.35% and 33.10% lower than those of the control (P<0.05), respectively. As (Ⅲ) was the predominant speciation of As in rice. Compared to the control, foliar application of solution with Na2SiO3+rhamnolipid significantly reduced the As (Ⅲ) contents in roots and shoots by 27.74% and 21.50%(P<0.05), respectively. Considering the accumulation of As in rice roots and shoots and the transport of As from roots to shoots, the cluster analysis of different silicon conditioner treatments showed that the treatment of spraying Na2SiO3+rhamnolipid was a low accumulation group of As in rice. Therefore, the rhamnolipid as bio-surfactant combined with silicate solution was the best silicon conditioner for inhibiting the uptake and accumulation of As in rice seedlings, which would provide technical support for food security of rice in As-contaminated regions of China.
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