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Nitrogen Fertiliser Reduction at Different Rice Growth Stages and Increased Density Improve Rice Yield and Quality in Northeast China

Author

Listed:
  • Wenjun Dong

    (Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin 150023, China
    Heilongjiang Provincial Key Laboratory of Crop Physiology and Ecology in Cold Region, Harbin 150023, China
    These authors contributed equally to this work.)

  • Yuhan Zhang

    (College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, China
    These authors contributed equally to this work.)

  • Frederick Danso

    (CSIR-Oil Palm Research Institute, Kade P.O. Box 74, Ghana
    Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China
    These authors contributed equally to this work.)

  • Jun Zhang

    (Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China)

  • Ao Tang

    (Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin 150023, China
    Heilongjiang Provincial Key Laboratory of Crop Physiology and Ecology in Cold Region, Harbin 150023, China)

  • Youhong Liu

    (Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin 150023, China
    Heilongjiang Provincial Key Laboratory of Crop Physiology and Ecology in Cold Region, Harbin 150023, China)

  • Kai Liu

    (Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China
    Northeast Branch of National Center of Technology Innovation for Saline-Alkali Tolerant Rice, Harbin 150086, China)

  • Ying Meng

    (Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin 150023, China
    Heilongjiang Provincial Key Laboratory of Crop Physiology and Ecology in Cold Region, Harbin 150023, China)

  • Lizhi Wang

    (Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin 150023, China
    Heilongjiang Provincial Key Laboratory of Crop Physiology and Ecology in Cold Region, Harbin 150023, China)

  • Zhongliang Yang

    (Institute of Biotechnology, Heilongjiang Academy of Agricultural Sciences, Harbin 150023, China)

  • Feng Jiao

    (College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, China)

Abstract

Rice yield and quality decline due to excessive fertiliser use is problematic in China. To increase rice grain filling and improve rice yield and quality, a nitrogen reduction and density increase study in 2023 and 2024 was imposed on a long-term experimental field. The four treatments adopted for the study were normal nitrogen and normal density (CK), normal nitrogen and increased density (NN+ID), reduced nitrogen in panicle fertiliser and increased density (RPN+ID), and reduced nitrogen in basal fertiliser and increased density (RBN+ID). RPN+ID and RBN+ID, respectively, produced a 3.0% and 5.1% higher yield than CK in both years. The mean grain filling rate (Va) of superior grains in RBN+ID increased by 12.5%, while the mean grain filling rate (Va) of inferior grains in the RPN+ID treatment increased by 4.2% with respect to CK. RPN+ID caused 0.4%, 9.6%, and 13.3% decline in the brown rice rate, chalkiness degree, and chalkiness rate, respectively, while RBN+ID triggered 0.4%, 7.2%, and 11.0% decline in the brown rice rate, chalkiness degree, and chalkiness rate, respectively. RPN+ID stimulated 4.2% and 3.1% increases in flavour and straight-chain amylose values, respectively. Whereas a 20% reduction in basal nitrogen fertiliser and a 32% increase in density improved the yield and appearance quality of rice, a 20% reduction in nitrogen fertiliser at the panicle stage and a 32% increase in density promoted a higher steaming flavour quality. Therefore, an appropriate reduction in nitrogen fertiliser while simultaneously increasing rice density has a significant impact on rice quality, fertiliser pollution reduction, and is a theoretical basis for rice yield and quality improvement in Northeast China.

Suggested Citation

  • Wenjun Dong & Yuhan Zhang & Frederick Danso & Jun Zhang & Ao Tang & Youhong Liu & Kai Liu & Ying Meng & Lizhi Wang & Zhongliang Yang & Feng Jiao, 2025. "Nitrogen Fertiliser Reduction at Different Rice Growth Stages and Increased Density Improve Rice Yield and Quality in Northeast China," Agriculture, MDPI, vol. 15(8), pages 1-20, April.
    • Handle: RePEc:gam:jagris:v:15:y:2025:i:8:p:892-:d:1638408
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    References listed on IDEAS

    as
    1. Can Zhao & Guangming Liu & Yue Chen & Yan Jiang & Yi Shi & Lingtian Zhao & Pingqiang Liao & Weiling Wang & Ke Xu & Qigen Dai & Zhongyang Huo, 2022. "Excessive Nitrogen Application Leads to Lower Rice Yield and Grain Quality by Inhibiting the Grain Filling of Inferior Grains," Agriculture, MDPI, vol. 12(7), pages 1-17, July.
    2. Yinglong Chen & Yang Liu & Shiqi Dong & Juge Liu & Yang Wang & Shahid Hussain & Huanhe Wei & Zhongyang Huo & Ke Xu & Qigen Dai, 2022. "Response of Rice Yield and Grain Quality to Combined Nitrogen Application Rate and Planting Density in Saline Area," Agriculture, MDPI, vol. 12(11), pages 1-13, October.
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