28
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Development of a Critical Nitrogen Dilution Curve of Double Cropping Rice in South China

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The concept of critical nitrogen ( N c) concentration can be implemented to diagnose in-season plant nitrogen (N) status for optimizing N fertilizer management. The N c dilution curves have been established for rice ( Oryza sativa L.) grown in different climatic regions, yet no attempt has been made to develop the N c dilution curve for double cropping rice regions. This study was undertaken to develop the N c dilution curves for double cropping rice in south China for assessment of in-season N status and to establish the relationships N nutrition index (NNI) and relative yield (RY) for in-season prediction of rice grain yield. Three different N application rate field experiments using six Indica rice varieties, including two early rice hybrids and four late rice hybrids were carried out in east China. The N c dilution curves based on whole plant N concentration were determined and described as, N c = 3.37 W −0.44 for early rice and N c = 3.69 W −0.34 for late rice. The constant N concentration at early growth stage was 3.31 and 3.15% DM for early and late rice, respectively. Late rice showed a higher capacity of N accumulation and a lower rate of N decline per unit shoot biomass as compared to early rice. The curves for present study were different from the existing reference curves for Indica and Japonica rice grown in different rice growing regions. Integrated N nutrition index (NNI int) based on N c was used to estimate RY at different growth periods using linear regression functions. The results showed that the critical curves and relationship between NNI int and RY could be used as a reliable indicator of N status diagnosis, grain yield prediction as well as to provide technical support in N management for double cropping rice in south China.

          Related collections

          Most cited references37

          • Record: found
          • Abstract: not found
          • Article: not found

          Diagnosis tool for plant and crop N status in vegetative stage

            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Determination of a Critical Nitrogen Dilution Curve for Winter Wheat Crops

            E Justes (1994)
              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Strategies for overcoming low agronomic nitrogen use efficiency in irrigated rice systems in China

                Bookmark

                Author and article information

                Contributors
                Journal
                Front Plant Sci
                Front Plant Sci
                Front. Plant Sci.
                Frontiers in Plant Science
                Frontiers Media S.A.
                1664-462X
                28 April 2017
                2017
                : 8
                : 638
                Affiliations
                [1] 1Jiangsu Key Laboratory for Information Agriculture, National Engineering and Technology Center for Information Agriculture, Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University Nanjing, China
                [2] 2Institute of Agricultural Engineering, Jiangxi Academy of Agricultural Sciences Nanchang, China
                Author notes

                Edited by: Pan Kaiwen, Chengdu Institute of Biology (CAS), China

                Reviewed by: Zunfu Lv, Zhejiang A&F University, China; Yinghua Zhang, China Agricultural University, China

                *Correspondence: Liang Tang tangl@ 123456njau.edu.cn

                This article was submitted to Agroecology and Land Use Systems, a section of the journal Frontiers in Plant Science

                Article
                10.3389/fpls.2017.00638
                5408224
                28503181
                d4958528-ecbf-4b10-b955-38baf1f59a56
                Copyright © 2017 He, Qiu, Ata-Ul-Karim, Li, Liu, Cao, Zhu, Cao and Tang.

                This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

                History
                : 22 November 2016
                : 10 April 2017
                Page count
                Figures: 7, Tables: 5, Equations: 11, References: 42, Pages: 14, Words: 8288
                Funding
                Funded by: Ministry of Agriculture of the People's Republic of China 10.13039/501100004573
                Funded by: National Natural Science Foundation of China 10.13039/501100001809
                Categories
                Plant Science
                Original Research

                Plant science & Botany
                late rice,early rice,critical nitrogen dilution curve,nitrogen nutrition index,shoot biomass,yield

                Comments

                Comment on this article