Optimizing N rates enhanced crop yields and mitigated N2O emissions in a peanut–wheat cropping system in the North China Plain
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Le résumé fourni par la source
Optimal nitrogen (N) inputs are critical for reconciling crop yields with greenhouse gas (GHG) mitigation in agroecosystems. The peanut-wheat cropping system has been shown to reduce synthetic N inputs through biological N fixation and legacy effects in the North China Plain (NCP). However, excessive N input remains prevalent in this region, and system-level responses to N optimization are not well understood. A three-year field experiment was conducted with five N application rates (0–200 kg N ha −1 for the peanut; uniform 120 kg N ha −1 for the wheat) to evaluate their effects on soil carbon and N dynamics, GHG emissions, and crop productivity. Increasing N inputs enhanced N 2 O emissions by 211‒481% during the peanut season, likely driven by increased soil mineral N availability. In contrast, this effect was limited in the subsequent wheat season, as uniform N application diminished treatment contrasts and masked residual N effects. Consequently, cumulative N 2 O emissions increased by 66‒153% across the peanut-wheat system. Higher N rates primarily increased soil mineral N stocks and negatively affected soil organic carbon sequestration. Importantly, moderate N input (150 kg N ha −1 ) achieved yields comparable to the 200 kg N ha −1 treatment, indicating no yield penalty under optimized N management. Although differences in net global warming potential (net GWP) and net ecosystem economic benefit (NEEB) were not statistically significant, 150 kg N ha −1 showed the best performance, balancing environmental and economic outcomes. These results provide a basis for optimizing N application in similar regions to achieve high yield, reduced emissions, and coordinated development in peanut-wheat systems.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Optimizing N rates enhanced crop yields and mitigated N2O emissions in a peanut–wheat cropping system in the North China Plain
- Date Crossref
- 01/09/2026
- Éditeur
- Elsevier BV
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Ministry of Agriculture and Rural Affairs pays non établi dans la noticeOrganisme public
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China Agricultural University pays non établi dans la noticeUniversité ou école supérieure
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Northwest A&F University pays non établi dans la noticeUniversité ou école supérieure
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Aarhus University Department of Agroecology pays non établi dans la noticeUniversité ou école supérieure
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Scotland's Rural College pays non établi dans la noticeUniversité ou école supérieure
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University of Tasmania Tasmanian Institute of Agriculture pays non établi dans la noticeUniversité ou école supérieure
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Chinese Academy of Agricultural Sciences pays non établi dans la noticeOrganisme public
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Institute of Crop Sciences pays non établi dans la noticeOrganisation à but non lucratif
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College of Agronomy and Biotechnology pays non établi dans la noticeUniversité ou école supérieure
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College of Natural Resources and Environment pays non établi dans la noticeUniversité ou école supérieure
Ministry of Agriculture and Rural Affairs, China Agricultural University et Northwest A&F University, avec 7 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.