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长期清除草和双种作物系统降低了土壤中的含量和大米的吸收:四年实地分析

Beibei Tian¹, Yihao Yang¹, Anwei Chen¹

¹College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China.

Journal of environmental sciences (China)

|December 1, 2024

概括

从田野中去除作物草可以显著减少土壤和大米中的 (Cd) 污染. 清除草是一种可行的策略,以减轻双重作物系统中的Cd风险.

科学领域:

农业科学农业科学
环境科学环境科学
土壤科学土壤科学

背景情况:

农作物回收可能会增加农业土壤中的 (Cd) 污染.
草管理对土壤-大米生态系统中Cd的长期影响尚未完全理解.

研究的目的:

调查草回归 (SR) 和草移除 (NSR) 对土壤和大米中Cd积累和生物可用性的影响.
为了评估Cd污染风险在四年多的双种作物系统.

主要方法:

进行了一项为期四年的实地研究,比较SR和NSR实践.
分析了土壤和米样本的Cd度和生物可用性.

主要成果:

NSR降低了土壤中的Cd度 (16.93%-27.30%) 和生物利用率 (8.23%-21.05%).
SR增加了土壤Cd生物利用率 (38.64%-53.95%),土壤总Cd (5.47%-36.58%),以及棕Cd (8.00%-100.24%).
四年的NSR确保棕Cd水平符合国家安全标准.

结论:

清除草有效地减轻了作物和农田中Cd污染的风险.
建议在湖南省采用传统的双重耕种和吸管去除,以控制Cd污染.

关键词:

(Cd) 是一种双种作物大米的双种作物大米植物疗法 (Phytoremediation) 是一种植物疗法.清除草清除草的方法

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