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Field aging declines the regulatory effects of biochar on cadmium uptake by pepper in the soil

文献类型： 外文期刊

作者： Xing, Dan 1 ; Cheng, Hongguang 1 ; Ning, Zengping 1 ; Liu, Yizhang 1 ; Lin, Shan 3 ; Li, Yongfu 5 ; Wang, Xi 4 ; Hill, Paul 3 ; Chadwick, Dave 3 ; Jones, Davey L. 3 ;

作者机构： 1.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Guizhou, Peoples R China

2.Guizhou Acad Agr Sci, Inst Pepper Guiyang, Guiyang 550000, Peoples R China

3.Bangor Univ, Sch Environm Nat Resources & Geog, Bangor LL57 2UW, Gwynedd, Wales

4.Huazhong Agr Univ, Coll Resources & Environm, Key Lab Arable Land Conservat Middle & Lower Reach, Minist Agr, Wuhan 430070, Peoples R China

5.Zhejiang A&F Univ, State Key Lab Subtrop Silviculture, Hangzhou 311300, Peoples R China

6.Murdoch Univ, Food Futures Inst, Ctr Sustainable Farming Syst, SoilsWest, Murdoch, WA, Australia

关键词： Aging; Biochar; Heavy metal pollution; Uptake; Adsorption

期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：8.91； 五年影响因子：8.549 ）

ISSN： 0301-4797

年卷期： 2022 年 321 卷

页码：

收录情况： SCI

摘要： Biochar application is not only being widely promoted as an ideal strategy to mitigate global climate warming, but it also has the advantage of reducing heavy metal bioavailability and migration in the soil. However, studies on the effects of field aging on biochar to reduce heavy metals from the soil are still limited. The present study aimed to explore the effects and mechanisms of aged biochar added to the soil planted with pepper plants on cadmium (Cd) uptake. To achieve this, un-amended soil (control), soil amended with fresh biochar, and aged biochar (biochar recovered from a long-term field trial after 9 years) were used to investigate the effects of field aging on biochar adsorption efficiency. The results revealed that the amount of Cd in the plant planted in control soil, amended with fresh and aged biochar, accounted for 40 & PLUSMN; 6.10, 17.18 & PLUSMN; 1.19, and 18.68 & PLUSMN; 0.79, respec-tively. There was a significant difference (P < 0.05) in the amount of Cd that was uptaken by plants among all treatments. However, soil amended with fresh biochar significantly (P < 0.05) decreased the amount of Cd in plants compared with soil amended with aged biochar. This indicates that field aging declines the potential of biochar to lower heavy metal bioavailability and retention in the soil. This study demonstrates that long-term burial lessens the ability of biochar to interact with Cd and suggests that biochar amendment can lower Cd in the soil, depending on the freshness and aging of biochar.

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