Environment and agricultural practices regulate enhanced biochar-induced soil carbon pools and crop yield: A meta-analysis

Using biochar in agriculture to enhance soil carbon storage and productivity has been recognized as an effective means of carbon sequestration. However, the effects on crop yield and soil carbon and nitrogen can vary depending on environmental conditions, field management, and biochar conditions. Th...

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Published in:The Science of the total environment 2023-12, Vol.905, p.167290-167290, Article 167290
Main Authors: Zhang, Nanhai, Ye, Xu, Gao, Yuan, Liu, Gaoxiang, Liu, Zihan, Zhang, Qilin, Liu, Enke, Sun, Shikun, Ren, Xiaolong, Jia, Zhikuan, Siddique, Kadambot H.M., Zhang, Peng
Format: Article
Language:English
Subjects:
Biochar
Crop yield
Meta-analysis
Soil carbon
Soil total nitrogen
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Summary:Using biochar in agriculture to enhance soil carbon storage and productivity has been recognized as an effective means of carbon sequestration. However, the effects on crop yield and soil carbon and nitrogen can vary depending on environmental conditions, field management, and biochar conditions. Thus, we conducted a meta-analysis to identify the factors contributing to these inconsistencies. We found that biochar application significantly increased soil organic carbon (SOC), microbial biomass carbon (MBC), dissolved organic carbon (DOC), easily oxidized carbon (EOC), particulate organic carbon (POC), total nitrogen (TN), and the C:N ratio in topsoil (0–20 cm) and crop yields. Biochar was most effective in tropical regions, increasing SOC, Soil TN, and crop yield the most, with relatively moderate pyrolysis temperatures (550–650 °C) more conducive to SOC accumulation and relatively low pyrolysis temperatures (
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2023.167290