Impacts of the combined application of digestate-based compost and biochar on the heavy metal Cd distribution and stress in the plant-soil system
文献类型： 外文期刊
作者： Zhen, Feng 1 ; Zhou, Hengbing 2 ; Han, Linpei 2 ; Zhang, Yifan 2 ; Pang, Yuwan 4 ; Xing, Tao 1 ; Li, Lei 2 ;
作者机构： 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
2.Chongqing Univ, Key Lab Three Gorges Reservoir Reg Ecoenvironm, Minist Educ, Inst Environm & Ecol, Chongqing 400045, Peoples R China
3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China
4.Guangdong Acad Agr Sci, Inst Agr Resources & Environm, Guangzhou 510640, Peoples R China
关键词： Digestate-based compost; Biochar; Cadmium-contaminated soil; Plant-soil system; Microbial community
期刊名称：BIOCHEMICAL ENGINEERING JOURNAL （ 影响因子：3.8； 五年影响因子：3.7 ）
ISSN： 1369-703X
年卷期： 2025 年 221 卷
页码：
收录情况： SCI
摘要： In this study, a pot experiment was conducted to evaluate the effects of digestate-based compost, chemical fertilizer, and their combination with biochar on heavy metal distribution, plant growth, and soil microbial communities. The experimental results demonstrated that the combined application of digestate-based compost and biochar (OFB group) promoted heavy metal immobilization in soil and enhanced plant growth, while reducing the accumulation of heavy metals in plants. Oxidizable and residual Cd levels in the OFB group increased by 14.90 % and 17.60 % compared to the control group. The biomass of Chinese cabbage was 384 % higher than that of the control group, and its Cd content decreased by 57.90 % compared to the control group. The addition of digestate-based compost to the soil increased soil organic matter, total nitrogen, total phosphorus, total potassium, and electrical conductivity (p < 0.05), along with the relative abundance of beneficial microorganisms such as Bacillus, norank_f__norank_o__Actinomarinales, Chryseolinea, Saccharomonospora, Pseudomonas, and norank_f__BIrii41. Biochar played a significant role in minimizing the migration of heavy metals to plants. The study demonstrated that the combined application of digestate-based compost and biochar reduces heavy metal stress, enhances soil fertility, and promotes biomass growth, offering potential solutions for the sustainable management of cadmium-contaminated soil and the application of digestate-based compost.
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