尿素配施硝化抑制剂对油菜苗期镉累积及土壤微生物群落的影响  

Application of Urea Combined with Nitrification Inhibitors Affects Cadmium Accumulation in Brassica napus Seedlings and Soil Microbial Community

作　　者：侯金权 肖晨锋 张鹏 石宇 张黎 王静 HOU Jin-quan;XIAO Chen-feng;ZHANG Peng;SHI Yu;ZHANG Li;WANG Jing(Xiangxi Branch of Hunan Tobacco Company,Jishou 416000,PRC;College of Environment and Ecology,Hunan Agricultural University,Changsha 410128,PRC;Xiangxi Prefecture Bureau of Agriculture and Rural Affairs,Jishou 416000,PRC)

机构地区：[1]湖南省烟草公司湘西自治州公司,湖南吉首416000 [2]湖南农业大学环境与生态学院,湖南长沙410128 [3]湖南省湘西州农业农村局,湖南吉首416000

出　　处：《湖南农业科学》2024年第6期66-73,共8页Hunan Agricultural Sciences

基　　金：现代农业产业技术体系建设专项资金资助(CARS-21);湘西自治州烟草专卖局(公司)科技项目。

摘　　要：通过田间试验探究硝化抑制剂(NIs)DCD、DMPP不同配施浓度对土壤理化性质及油菜吸收积累Cd的影响。结果表明:与单施尿素(CK)相比,尿素配施不同浓度DCD、DMPP均能降低土壤pH值,土壤铵态氮(NH_(4)^(+)-N)含量增加8.17%~56.73%,硝态氮(NO_(3)^(-)-N)含量降低3.47%~21.64%;与CK相比,尿素配施DCD、DMPP均能显著增加土壤有效态Cd含量,并使油菜根部Cd含量显著增加13.36%~47.40%,油菜茎叶部Cd含量显著增加8.38%~29.78%;尿素配施DCD、DMPP降低了油菜根际微生物群落多样性和丰度,改变了微生物门水平的群落结构,DCD、DMPP使硝化螺旋菌门丰度占比降低1.34%、2.10%。Field experiments were conducted to investigate the effects of urea combined with different concentrations of nitrification inhibitors(DCD and DMPP)on soil physicochemical properties and Cd accumulation in Brassica napus.The results showed that compared with the application of urea alone(CK),the application of urea combined with different concentrations of DCD and DMPP reduced soil pH,increased soil ammonium nitrogen(_(4)^(+))by 8.17%-56.73%,and decreased soil nitrate nitrogen(NO_(3)^(-))by 3.47%-21.64%.While increasing the soil available Cd,the combined application increased the Cd content in the underground and aboveground parts of B.napus by 13.36%-47.40%and 8.38%-29.78%,respectively.The application of urea combined with DCD and DMPP reduced the diversity and abundance of microbial communities in the rhizosphere of B.napus and altered the community structure at the phylum level.DCD and DMPP reduced the abundance of Nitrospirae by 1.34%and 2.10%,respectively.

关 键 词：硝化抑制剂 镉积累 油菜 微生物群落 

分 类 号：S143.16[农业科学—肥料学]