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
侯金权 1肖晨锋 2张鹏 1石宇 3张黎 3王静3
作者信息
- 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
- 折叠
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(NH4+-N)含量增加8.17%～56.73%,硝态氮(NO3--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%.
Abstract
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(NH4+-N)by 8.17%-56.73%,and decreased soil nitrate nitrogen(NO3--N)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Key words
nitrification inhibitor/cadmium accumulation/Brassica napus/microbial community引用本文复制引用
基金项目
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()
出版年
2024
国家科技期刊平台
NSTL
万方数据