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积累抑制了米使用效率,通过抑制树根球化和促进酸盐的减少来抑制的化

Fangying Shi¹, Huajun Fang², Shulan Cheng³

¹Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.

Journal of hazardous materials

|July 22, 2025

概括

污染通过破坏土壤来损害米使用效率 (NUE). 实地研究表明,Cd压力改变了微生物群落和营养循环,减少了土中的NUE.

科学领域:

环境科学环境科学
土壤科学土壤科学
农业学是一种农业学.

背景情况:

(Cd) 污染损害了米土壤中 (N) 的可用性和米中使用效率 (NUE).
有限的实地研究存在于Cd对压力下N转化和米N利用的影响.
关联N转化,Cd应力和米NUE的机制需要澄清.

研究的目的:

调查Cd添加对土壤N转化,微生物群落和田间米NUE的影响.
阐明土壤和植物参数对Cd压力的剂量依赖反应.
了解在水生态系统中Cd压力下的N转换的调节机制.

主要方法:

用多个Cd加值级别进行实地实验.
分析植物特征,营养含量 (N,P) 和根球和散土中的微生物群落.
微生物基因分析的元基因组测序和生物信息学.

主要成果:

添加Cd对微生物群落,N转化和米NUE产生了剂量依赖的影响.
根球土壤对Cd压力比散土土壤更敏感.
Cd减少了土壤N形式 (NH4+-N,NO3−-N) 和植物N度/NUE,但增加了土壤P;抑制了化基因,同时促进了DNRA和脱基因.

结论:

Cd压力显著改变了微生物结构和土壤N/P的可用性,损害了大米的N吸收和NUE.
急性Cd暴露会破坏土壤N循环并减少N供应,威胁到农业生态系统的稳定性.
调查结果强调需要在农田管理策略中考虑Cd影响.

关键词:

积累的积累的.转基因组学是指转基因组学.的转化过程中的.的使用效率效率.这里是大米土壤.

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