Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15588 |
Meta‐analysis of yield and nitrous oxide outcomes for nitrogen management in agriculture | |
Tai M. Maaz; Tek B. Sapkota; Alison J. Eagle; Michael B. Kantar; Tom W. Bruulsema; Kaushik Majumdar | |
2021-04-08 | |
发表期刊 | Global Change Biology |
出版年 | 2021 |
英文摘要 | Improved nitrogen (N) use is key to future food security and environmental sustainability. While many regions still experience N shortages, agriculture is the leading global emitter of N2O due to losses exacerbated by N surpluses in other regions. In order to sustainably maintain or increase food production, farmers and their advisors need a comprehensive and actionable understanding of how nutrient management affects both yield and N2O emissions, particularly in tropical and subtropical agroecosystems. We performed a meta‐analysis to determine the effect of N management and other factors on N2O emissions, plant N uptake, and yield. Our analysis demonstrates that performance indicators—partial N balance and partial factor productivity—predicted N2O emissions as well as or better than N rate. While we observed consistent production and environmental benefits with enhanced‐efficiency fertilizers, we noted potential trade‐offs between yield and N2O emissions for fertilizer placement. Furthermore, we observed confounding effects due to management dynamics that co‐vary with nutrient application practices, thus challenging the interpretation of the effect of specific practices such as fertilization frequency. Therefore, rather than providing universally prescriptive management for N2O emission reduction, our evidence supports mitigation strategies based upon tailored nutrient management approaches that keep N balances within safe limits, so as to minimize N2O emissions while still achieving high crop yields. The limited evidence available suggests that these relationships hold for temperate, tropical, and subtropical regions, but given the potential for expansion of N use in crop production, further N2O data collection should be prioritized in under‐represented regions such as Sub‐Saharan Africa. |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/321965 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Tai M. Maaz,Tek B. Sapkota,Alison J. Eagle,等. Meta‐analysis of yield and nitrous oxide outcomes for nitrogen management in agriculture[J]. Global Change Biology,2021. |
APA | Tai M. Maaz,Tek B. Sapkota,Alison J. Eagle,Michael B. Kantar,Tom W. Bruulsema,&Kaushik Majumdar.(2021).Meta‐analysis of yield and nitrous oxide outcomes for nitrogen management in agriculture.Global Change Biology. |
MLA | Tai M. Maaz,et al."Meta‐analysis of yield and nitrous oxide outcomes for nitrogen management in agriculture".Global Change Biology (2021). |
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