土壤修复剂能否协同缓解喀斯特水田的水稻镉含量和甲烷排放量？

IF 1.4 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Acta Geochimica Pub Date : 2024-05-23 DOI:10.1007/s11631-024-00696-0

Wangbiao Lu, Guangneng Zeng, Weijun Luo, Jiangju Song, Maofei Ni, Shuangqin Guo, Qi Zhang, Chengling Huang, Cheng Yang, Haijun Du, Shijie Wang

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引用次数: 0

摘要

稻田（Oryza sativa L.）日益受到镉（Cd）污染的威胁，并有可能成为大气中的甲烷（CH4）排放源。修复剂可广泛缓解稻田土壤中的镉污染，但我们对其对 CH4 排放的影响知之甚少。在此，我们通过添加生物炭（B）、巯基改性钙钛矿（SMP）和硒叶面肥（SFF）进行了盆栽实验，研究了土壤和水稻中的镉含量以及原位 CH4 通量。与 CK 相比，添加 SMP、SFF 和 B-SMP 可使糙米中的镉含量分别减少 25%至 50%、25% 和 50%至 75%。添加 7% B、7% B-0.01% SMP 和 SFF 后，CH4 排放量分别减少了 8.46%、5.30% 和 4.11%。CH4 排放量在生长季逐渐增加，累计 CH4 通量在 338.82 至 619.13 kg hm-2 之间。研究结果表明，7% B-0.01% SMP 和 SFF 混合施肥对镉修复和 CH4 排放具有协同作用。这项研究揭示了减少喀斯特稻田镉污染和甲烷排放的可行性，希望能补充土壤修复和碳排放协同控制方面的知识。

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Can soil remediation agents synergistically mitigate rice Cd content and CH4 emission from karst paddies?

Rice (Oryza sativa L.) paddies are increasingly threatened by cadmium (Cd) pollution, and potentially serve as CH₄ emitters to the atmosphere. Remediation agents widely mitigate Cd pollution in paddy soil, however, we know little about their regulations on CH₄ emission. Here, via adding biochar (B), sulfhydryl-modified palygorskite (SMP), and selenium foliar fertilizer (SFF), we conducted a pot experiment to investigate soil and rice Cd contents together with in-situ CH₄ fluxes. Compared to CK, the addition of SMP, SFF, and B-SMP reduced Cd in brown rice by 25% to 50%, 25%, and 50% to 75%, respectively. Agents 7% B, 7% B-0.01% SMP, and SFF reduced CH₄ emissions by 8.46%, 5.30%, and 4.11%, respectively. CH₄ emission increased gradually along the growing season, with the cumulative CH₄ fluxes ranging between 338.82 and 619.13 kg hm⁻². Our results highlight that mixed 7% B-0.01% SMP and SFF showed collaborative effects on Cd remediation and CH₄ emission. This study reveals the feasibility of reducing Cd pollution and CH₄ emission in karst rice paddies, which hopes to supplement the knowledge of collaborative controls on soil remediation and carbon emission.

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来源期刊

Acta Geochimica GEOCHEMISTRY & GEOPHYSICS-

CiteScore

2.80

自引率

6.20%

发文量

1134

期刊介绍： Acta Geochimica serves as the international forum for essential research on geochemistry, the science that uses the tools and principles of chemistry to explain the mechanisms behind major geological systems such as the Earth‘s crust, its oceans and the entire Solar System, as well as a number of processes including mantle convection, the formation of planets and the origins of granite and basalt. The journal focuses on, but is not limited to the following aspects: • Cosmochemistry • Mantle Geochemistry • Ore-deposit Geochemistry • Organic Geochemistry • Environmental Geochemistry • Computational Geochemistry • Isotope Geochemistry • NanoGeochemistry All research articles published in this journal have undergone rigorous peer review. In addition to original research articles, Acta Geochimica publishes reviews and short communications, aiming to rapidly disseminate the research results of timely interest, and comprehensive reviews of emerging topics in all the areas of geochemistry.