Effects of Conservation Agriculture on Soil N2O Emissions and Crop Yield in Global Cereal Cropping Systems

IF 12 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION
Yuhao Zhu, Ziyang Li, Dan Zhao, Bowen Zhang, Bo Zhu, Zhisheng Yao, Ralf Kiese, Klaus Butterbach-Bahl, Minghua Zhou
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引用次数: 0

Abstract

Conservation agriculture, which involves minimal soil disturbance, permanent soil cover, and crop rotation, has been widely adopted as a sustainable agricultural practice globally. However, the effects of conservation agriculture practices on soil N2O emissions and crop yield vary based on geography, management methods, and the duration of implementation, which has hindered its widespread scientific application. In this study, we assessed the impacts of no-tillage (NT), both individually and in combination with other conservation agriculture principles, on soil N2O emissions and crop yields worldwide, based on 1270 observations from 86 peer-reviewed articles. Our results showed that conservation agriculture practices significantly increased crop yield by 9.1% while significantly reducing soil N2O emissions by 6.8% compared to conventional tillage (CT). These mitigation effects were even greater when NT was combined with other conservation agriculture principles, such as crop residue retention and crop rotation, leading to reductions in N2O emissions of over 15% and yield increases of more than 30%. Additionally, conservation agriculture was more effective at mitigating soil N2O emissions in dry climates compared to humid regions. Long-term adoption of conservation agriculture practices was found to reduce soil N2O emissions by up to 26% without compromising crop yields. Smallholder farm in Central Asia, South Asia, and sub-Saharan Africa appear particularly suitable for the adoption of conservation agriculture, whereas, in humid climates, high nitrogen (N) input management and silt-clay loam soil should be applied with caution. Overall, conservation agriculture holds significant potential for mitigating soil N2O emissions while enhancing grain yields in cereal cropping systems.

Abstract Image

保护性农业对全球谷物种植系统土壤N2O排放和作物产量的影响
保护性农业是一种具有最小土壤扰动、永久土壤覆盖和作物轮作的可持续农业,已被全球广泛采用。然而,保护性农业实践对土壤N2O排放和作物产量的影响因地理位置、管理方法和实施时间的不同而不同,这阻碍了其广泛的科学应用。在这项研究中,我们基于86篇同行评议文章中的1270项观察结果,评估了免耕(NT)对全球土壤N2O排放和作物产量的影响,包括单独和与其他保护性农业原则相结合。结果表明,与传统耕作(CT)相比,保护性耕作使作物产量显著提高9.1%,土壤N2O排放量显著减少6.8%。当NT与其他保护性农业原则(如作物残茬保留和作物轮作)相结合时,这些缓解效果甚至更大,导致一氧化二氮排放量减少15%以上,产量增加30%以上。此外,与湿润地区相比,保护性农业在缓解干旱气候下土壤N2O排放方面更有效。研究发现,长期采用保护性农业做法可在不影响作物产量的情况下减少高达26%的土壤一氧化二氮排放。中亚、南亚和撒哈拉以南非洲的小农农场似乎特别适合采用保护性农业,而在潮湿气候地区,应谨慎采用高氮(N)投入管理和粉质粘土壤土。总体而言,保护性农业在减少土壤N2O排放的同时提高谷物种植系统的粮食产量方面具有巨大潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Global Change Biology
Global Change Biology 环境科学-环境科学
CiteScore
21.50
自引率
5.20%
发文量
497
审稿时长
3.3 months
期刊介绍: Global Change Biology is an environmental change journal committed to shaping the future and addressing the world's most pressing challenges, including sustainability, climate change, environmental protection, food and water safety, and global health. Dedicated to fostering a profound understanding of the impacts of global change on biological systems and offering innovative solutions, the journal publishes a diverse range of content, including primary research articles, technical advances, research reviews, reports, opinions, perspectives, commentaries, and letters. Starting with the 2024 volume, Global Change Biology will transition to an online-only format, enhancing accessibility and contributing to the evolution of scholarly communication.
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