秸秆覆盖物和氮肥:中国玉米增产减排的可行绿色解决方案

IF 6.4 1区 农林科学 Q1 AGRONOMY
Huihui Wei, Li Zhang, Rongzhu Qin, Zeyu Zhao, Yalan Huang, Guojun Sun, Matthew Tom Harrison, Feng Zhang
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引用次数: 0

摘要

在全球变暖的背景下,农业部门面临着既要保障粮食安全,又要实现碳中和的双重挑战。目前,虽然使用氮肥和地膜来提高玉米产量已有大量文献记载,但对与这些策略相关的碳中和潜力和整体效益,包括温室气体(GHG)影响,还缺乏系统的评估。在此,我们使用经过校准的脱硝-脱碳(DNDC)模型,结合各种氮肥方案(N1:常规氮肥;N0.7:70% 常规氮肥)和地膜(CK:无地膜;PM:塑料薄膜地膜;SM:秸秆地膜),得出了一个基准情景(CKN1)和五个减缓情景(CKN0.7、PMN1、PMN0.7、SMN1、SMN0.7)。我们发现,玉米生长季节的平均净全球升温潜能值为 5293 千克二氧化碳当量公顷-1,其中最多的温室气体来自一氧化二氮(53%)。考虑到温室气体成本,玉米的环境和经济净效益为 5089 元人民币/公顷-1。目前,海南省、河南省、辽宁省和吉林省的玉米种植呈现出全球变暖潜势低、环境和经济净效益高的状态。在各种减缓情景中,只有 SMN1 同时减少了中国的温室气体排放量(- 59%),扩大了环境和经济净效益(+ 21%)。我们的研究结果首次计算了包括温室气体成本在内的地膜和氮肥的综合效益,不仅强调了地膜在实现碳中和方面的巨大潜力,还为政策制定者和行业在农业生产中选择合适的地膜技术提供了宝贵的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Straw mulch and nitrogen fertilizer: A viable green solution for enhanced maize benefits and reduced emissions in China

Straw mulch and nitrogen fertilizer: A viable green solution for enhanced maize benefits and reduced emissions in China

Against the backdrop of global warming, the agricultural sector grapples with the dual challenge of safeguarding food security while fulfilling carbon neutrality. Currently, although nitrogen fertilizer and mulch use to enhance maize yields is well-documented, systematic evaluations are lacking in the carbon neutrality potential and holistic benefits, including greenhouse gas (GHG) implications, associated with these strategies. Here, using the calibrated DeNitrification-DeComposition (DNDC) model, we conducted a long-term simulation (1980−2019) incorporating various scenarios of nitrogen fertilizer (N1: conventional nitrogen fertilizer; N0.7: 70% conventional nitrogen fertilizer) and mulch (CK: no-mulch; PM: plastic film mulch; SM: straw mulch), resulting in a baseline scenario (CKN1) and five mitigation scenarios (CKN0.7, PMN1, PMN0.7, SMN1, SMN0.7). We revealed an average net global warming potential during the maize growing season of 5293 kg CO2 eq ha−1, with the most GHG derived from N2O (53%). Considering GHG costs, the net environmental and economic benefits in maize amounted to 5089 CNY ha−1. Presently, Hainan, Henan, Liaoning, and Jilin provinces exhibit a state of low net global warming potential and high net environmental and economic benefits in maize cultivation. Of the mitigation scenarios, only SMN1 concurrently reduced GHG emissions (− 59%) and amplified net environmental and economic benefits (+ 21%) in China. Our results, which provide the first calculation of the combined benefits of mulch and nitrogen fertilizer including GHG costs, not only underscore the immense potential of mulch for enabling carbon neutrality, but also offer valuable insights for policymakers and industry in selecting suitable mulch techniques for agricultural production.

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来源期刊
Agronomy for Sustainable Development
Agronomy for Sustainable Development 农林科学-农艺学
CiteScore
10.70
自引率
8.20%
发文量
108
审稿时长
3 months
期刊介绍: Agronomy for Sustainable Development (ASD) is a peer-reviewed scientific journal of international scope, dedicated to publishing original research articles, review articles, and meta-analyses aimed at improving sustainability in agricultural and food systems. The journal serves as a bridge between agronomy, cropping, and farming system research and various other disciplines including ecology, genetics, economics, and social sciences. ASD encourages studies in agroecology, participatory research, and interdisciplinary approaches, with a focus on systems thinking applied at different scales from field to global levels. Research articles published in ASD should present significant scientific advancements compared to existing knowledge, within an international context. Review articles should critically evaluate emerging topics, and opinion papers may also be submitted as reviews. Meta-analysis articles should provide clear contributions to resolving widely debated scientific questions.
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