3种硝化抑制剂对小麦幼苗生长毒性的比较  

Comparison of Toxicity Induced by Three Nitrification Inhibitors on Wheat

作　　者：奉小忧[1] 曾清如[1] 皮荷杰[1] 王文[1] 孙毓临[1] 张伟华[1] 廖建宇[1] 

机构地区：[1]湖南农业大学资源环境学院,长沙410128

出　　处：《生态毒理学报》2010年第2期268-273,共6页Asian Journal of Ecotoxicology

基　　金：国家自然科学基金项目(No.30770389)

摘　　要：在土壤(山西土)中加入不同种类、不同浓度的硝化抑制剂(氢醌、硫脲、双氰胺),研究了其对小麦发芽势、发芽率和幼苗生长的影响.结果表明:双氰胺对小麦发芽势和发芽率的抑制作用不明显,硫脲对小麦发芽势和发芽率有一定的抑制作用,而氢醌对小麦发芽势和发芽率抑制明显;双氰胺和氢醌对小麦幼苗生长的影响不大,而硫脲能显著降低小麦幼苗的根长、茎长、根重和茎重;双氰胺对小麦种子和幼苗毒性相对较小,硫脲毒性相对较大,小麦的根重、茎重和根伸长可以作为硫脲对小麦危害的敏感指标.Laboratory investigations were conducted to study the influence of three types of nitrification inhibitors（hydroquinone,thiourea and dicyandiamide）on seed germination and growth of wheat.Results showed that dicyandiamide had little effect on seed germination while thiourea inhibited the seed germination to a certain extent,and hydroquinone retarded the germination of wheat seeds significantly.The pot experiment indicated that hydroquinone and dicyandiamide had little influence on wheat growth while thiourea could reduce length and strength of root and stem significantly.Hydroquinone had low toxicity to seed germination and growth of wheat,while thiourea demonstrated high toxicity.The root length,height and stem height could be used as the sensitive indexes of effects of thiourea on wheat.

关 键 词：硝化抑制剂 发芽率 小麦 抑制率 

分 类 号：S143.16[农业科学—肥料学] S512.1[农业科学—农业基础科学]