Advances in the estimations and applications of critical nitrogen dilution curve and nitrogen nutrition index of major cereal crops. A review

Xinyu Li, Syed Tahir Ata-UI-Karim, Yue Li, Fei Yuan, Yuxin Miao, Kato Yoichiro, Tao Cheng, Liang Tang, Xingshuai Tian, Xiaojun Liu, Yongchao Tian, Yan Zhu, Weixing Cao, Qiang Cao

Research output: Contribution to journalReview articlepeer-review

32 Scopus citations

Abstract

Nitrogen (N) is one of the decisive elements for plant growth, crop biomass accumulation, and yield formation of cereal crops. However, managing N in crop production and comparing N use efficiency are challenging without prior knowledge of in-season crop N status. The development of critical N (Nc) dilution curves based on allometry between plant metabolic and structural compartments allows the estimation of crop N nutrition status by determining the N nutrition index (NNI). The purpose of this article is to review the research progress on the development of Nc curves in three major cereal crops (wheat, maize, and rice). The focus of this review paper is to compare the Nc curves of major cereals developed worldwide and to explain the differences in these Nc curve parameters in light of genotype through the management of environmental interactions. Additionally, this review provides an update on the most relevant methods for non-destructive estimation of the NNI of major cereal crops using various remote sensing technologies for large-scale applications. This review also sheds light on the applicability of Nc curve-based NNI for in-season crop N diagnosis, crop N requirement, crop grain yield, and quality prediction. Moreover, this review outlines future research directions to expand the impact of this approach on crop production.

Original languageEnglish (US)
Article number106998
JournalComputers and Electronics in Agriculture
Volume197
DOIs
StatePublished - Jun 2022

Bibliographical note

Funding Information:
This research was funded by the National Natural Science Foundation of China (31601222), the National Undergraduate Student Innovation Research and Entrepreneurship Training (SRT) of China (202110307003), the Jiangsu Province Key Technologies Research and Development Program (BE2021308), the Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the 111 Project (B16026), the Japan Society for the Promotion of Science for a Grant-in-Aid for Scientific Research (18KT0087), and the USDA National Institute of Food and Agriculture (State project 1016571). We would like to thank Gilles Lemaire from INRA for helpful revisions of the manuscript.

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

  • Cereal crops
  • Critical N dilution curve
  • NNI
  • Remote sensing

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