数字农科院2.0

The Effect of Cereal Crop Type on Reducing Emission Intensity With Biochar Application in Monsoon Asia

文献类型： 外文期刊

作者： Yan, Shengji;Forsyth, Karrym Alvin;Revillini, Daniel;Cui, Xiaoqing;Zhan, Xiaoying;Song, Zhenwei;Shang, Ziyin;Zhang, Weijian

作者机构：

关键词： biochar;GHG mitigation;maize;rice;wheat

期刊名称： FOOD AND ENERGY SECURITY

ISSN： 2048-3694

年卷期： 2025 年 14 卷 2 期

页码：

收录情况： SCIE（2025版）

摘要： Biochar amendments can reduce greenhouse gas (GHG) emissions from agricultural soils while helping to maintain food security. However, whether the effect of biochar application on emission intensity (EI) of non-CO2 greenhouse gas emissions (including methane (CH4) and nitrous oxide (N2O )), per unit of crop caloric content, varies for different crops and its driving mechanism remains unclear. Here, we conducted a meta-analysis of EI changes (Delta EI) with biochar application for three major cereal crops: rice, wheat, and maize, based on 202 observations from 41 research publications from Monsoon Asia. Our results showed that biochar application reduced the EI for all three crops by an average of -14.6 kg CO2 eq M cal(-1), with the greatest reduction in Delta EI for rice (-28.9 kg CO2 equation M cal(-1)). Biochar application-induced reduction in CH(4 )emissions (-0.4 Mg CO2 eq ha(-1)) was the main contributor to Delta EI for rice, which was greater than those for upland crops: maize and wheat (-0.1 Mg CO2 eq ha(-1) and 0.3 Mg CO2 eq ha(-1), respectively). Crop type directly affected Delta EI after biochar application. Additionally, crop type indirectly influenced Delta EI by associating with soil organic carbon and clay contents for N2O emission and CH(4 )emission, respectively. This study highlights that biochar application to soil reduces EI across the globally important agricultural region, and these reductions were most pronounced for rice compared to wheat and maize. Our study provides a better understanding of the effects of biochar on GHG emissions for three important crops and can facilitate the development of new strategies for agricultural GHG mitigation while maintaining food security for the future.

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