Recommended nitrogen rates and the verification of effects based on leaf SPAD readings of rice
Rattachement africain : cn, pk. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Modern rice production systems need a reliable, easy-to-use, efficient, and environmentally-friendly method to determine plant nitrogen (N) status , predict grain yield, and optimize N management. We conducted field experiments to determine the influence of different N rates on Soil Plant Analysis Development (SPAD) readings of rice leaves. We also performed field validations to evaluate the grain yield and N use efficiency under recommended N rates. Our results showed that leaf SPAD readings increased as N rates increased. We applied the recommended N based on the relationships between the N rates and leaf SPAD readings at the tillering and booting stages. The recommended N decreased N rates and improved N use efficiency without sacrificing grain yield. When compared to farmer practices (FP), the recommended N rates of optimization (OPT) decreased by 5.8% and 10.0%, respectively. In comparison with FP, the N agronomic efficiency of OPT increased by 5.8 and 10.0% while the partial factor productivity of N increased by 6.0 and 14.2%, respectively. The SPAD meter may be a reliable tool to analyze the N in rice, estimate real-time N fertilization, and improve N use efficiency.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Recommended nitrogen rates and the verification of effects based on leaf SPAD readings of rice
- Date Crossref
- 26/08/2021
- Éditeur
- PeerJ
- 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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Jilin Agricultural University pays non établi dans la noticeUniversité ou école supérieure
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Nuclear Institute for Agriculture and Biology Soil and Environmental Sciences Division pays non établi dans la noticeStructure de recherche
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COMSATS University Islamabad Department of Environmental Sciences pays non établi dans la noticeUniversité ou école supérieure
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Key Laboratory of Soil Resource Sustainable Utilization for Jilin Province Commodity Grain Bases/College of Resources and Environmental Science pays non établi dans la noticeUniversité ou école supérieure
Jilin Agricultural University, Soil and Environmental Sciences Division — Nuclear Institute for Agriculture and Biology et Department of Environmental Sciences — COMSATS University Islamabad, avec 1 autre affiliation.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.