纳米有机二氧化硅对土壤-青菜系统六六六迁移的影响  

Effect of Nanometer Organic Silica on Migration of BHC in Soil-greengrocery System

作　　者：许敏[1,2] 靳伟[1] 林云青[1,2] 章钢娅[1] 

机构地区：[1]中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室,江苏南京210008 [2]中国科学院研究生院,北京100049

出　　处：《安徽农业科学》2009年第5期2167-2169,共3页Journal of Anhui Agricultural Sciences

基　　金：国家重点基础研究发展规划(973)项目(2007CB936604);中国科学院知识创新工程重要方向项目(KSCX2-YW-N-38)

摘　　要：[目的]研究纳米有机二氧化硅对小青菜吸收土壤中六六六的阻抑作用。[方法]采用盆栽试验，研究六六六污染土壤中添加不同比例（0（CK）、1％、2％、4％）纳米有机二氧化硅对小青菜鲜重、土壤中六六六残留量和小青菜六六六含量的影响。[结果]纳米有机二氧化硅可促进小青菜生长，添加量为1％、2％的处理小青菜鲜重相等，且最大，对照鲜重最低；4个处理土壤中六六六残留量在1．25～1．80μg／g，对照残留量最高，添加1％纳米有机二氧化硅的土壤残留量最低。纳米有机二氧化硅添加比例为1％、2％和4％时，小青菜中的六六六含量分别较对照下降8．46％、67．47％和62．32％。[结论]土壤中纳米有机二氧化硅的添加比例为2％时，既有利于小青菜生长，又有利于抑制其对六六六的吸收。[Objective] The aim was to study the inhibition of nanometer organic silica on BHC absorption by greengrocery from soil. [Method] The pot test was taken to study the effects of nanometer organic silica with different ratio （0（CK）, 1%, 2%, 4% ） in polluted soil by BHC on fresh weight of greengrocery, BHC residue in soil and its content in greengrocery. [ Result ] The nanometer organic silica could promote the growth of greengrocery. The fresh weight of greengrocery in treatments with 1%, 2% nanoraeter organic silica addition was similar and the biggest, while that of CK was the lowest. The BHC residue in soil in 4 treatments ranged from 1.25 to 1.80 μg/g, the residue of CK was the highest and that with 1% nanometer organic silica addition was the lowest. When the ratio of nanometer organic silica addition were 1%, 2% and 4%, the BHC content in greengrocery were decreased by 8.46%, 67.47% and 62.32% than that of CK resp. [Conclusion] When the addition rate of organic silica in soil was 2%, it was beneficial to the growth of greengrocery and inhibiting its absorption on BHC.

关 键 词：六六六 纳米有机二氧化硅 土壤 小青菜 

分 类 号：S154.4[农业科学—土壤学]