Skip to main content

ORIGINAL RESEARCH article

Front. Plant Sci.
Sec. Crop and Product Physiology
Volume 15 - 2024 | doi: 10.3389/fpls.2024.1402677
This article is part of the Research Topic Novel Ways and Methodologies to Improve Crop Yield View all 21 articles

How forage grain ratoon rice (FG-RR) improves the grain yield during the ratoon season

Provisionally accepted
Pan p. Gai Pan p. Gai 1Yuan w. Chen Yuan w. Chen 2*Xin Sun Xin Sun 3*Hong j. Chen Hong j. Chen 3*Mao f. Ren Mao f. Ren 3*Lei Liu Lei Liu 3*Wei q. Wang Wei q. Wang 3*Hua b. Zheng Hua b. Zheng 3*Qi y. Tang Qi y. Tang 3*
  • 1 College of Agronomy, Hunan Agricultural University, Changsha, Hunan Province, China
  • 2 Crop Research Institute, Hunan Academy of Agricultural Sciences,Changsha 410125., changsha, China
  • 3 Hunan Agricultural University, Changsha, Hunan, China

The final, formatted version of the article will be published soon.

    In recent years, with the rapid extension of ratoon rice production in Hunan, one unique ratoon rice-based production systems, forage-grain ratoon rice (FG-RR) have been newly developed. Ratooning rice was a season of rice harvested by utilizing the dormant buds on the stubble left after harvesting the first season of rice to sprout and grow. Therefore, the characteristics of stubble themselves are crucial for the production of ratoon rice. The mowing period and higher stubble height directly affect the characteristics of regenerated stubbles. Based on this, we conducted the following research. In 2021 and 2022, field experiments were conducted in central China to study the effects of different mowing periods and higher stubble height on the regeneration rate and nutrient content of regenerated crops. The treatment includes two mowing periods (10 days after heading in the first season and 30 days after heading in the first season, respectively referred to as T10 and T30) and two stubble heights (10 and 30 cm, respectively referred to as H10 and H30). Compared with T30H30 treatment, T10H10, and T10H30 increased grain yield by 48.1%, 41.7%, 73.1%, and 65.2% in the two year ratoon season, while T30H10 reduced grain yield by 30.9% and 19.5% in the two years, respectively. Early mowing increased the panicles, spikelet panicle, and filled grain rate to varying increase, while higher stubble height increased panicles but decreased spikelet panicle.mowing On the one hand, early mowing and higher stubble height of stubble increased the dry and fresh weight, nonstructural carbohydrate (NSC), organic carbon (C), and nitrogen content of stubble, thereby improving the regeneration rate of ratoon rice. On the other hand, early mowing and higher stubble height retention increased the accumulation of nitrogen in stubble throughout the entire growth period and facilitated the transport of nitrogen to the mature panicles. Therefore, FG-RR appropriate early mowing and higher stubble height are the keys to improving the grain yield and stability of ratoon rice.

    Keywords: Ratoon rice, Regeneration rate, Stubble height, Nutrients, grain yield

    Received: 18 Mar 2024; Accepted: 30 Jul 2024.

    Copyright: © 2024 Gai, Chen, Sun, Chen, Ren, Liu, Wang, Zheng 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.

    * Correspondence:
    Yuan w. Chen, Crop Research Institute, Hunan Academy of Agricultural Sciences,Changsha 410125., changsha, China
    Xin Sun, Hunan Agricultural University, Changsha, 410128, Hunan, China
    Hong j. Chen, Hunan Agricultural University, Changsha, 410128, Hunan, China
    Mao f. Ren, Hunan Agricultural University, Changsha, 410128, Hunan, China
    Lei Liu, Hunan Agricultural University, Changsha, 410128, Hunan, China
    Wei q. Wang, Hunan Agricultural University, Changsha, 410128, Hunan, China
    Hua b. Zheng, Hunan Agricultural University, Changsha, 410128, Hunan, China
    Qi y. Tang, Hunan Agricultural University, Changsha, 410128, Hunan, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.