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Rational Utilization of Sediment Resources Improves Rice Yield and Nitrogen Use Efficiency under Salt Stress

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  • Shenghai Cheng

    (Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
    National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China
    These authors contributed equally to this work.)

  • Aibin He

    (National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China
    Hunan Hybrid Rice Research Center, Changsha 410125, China
    These authors contributed equally to this work.)

  • Xiayu Guo

    (National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China
    Hunan Hybrid Rice Research Center, Changsha 410125, China)

  • Rongyi Li

    (Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
    National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China)

  • Jianbo Wang

    (Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
    National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China)

  • Yucheng Qi

    (Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
    National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China)

  • Pengfei Zhang

    (Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
    National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China)

  • Weixu Tao

    (Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
    National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China)

  • Junchao Ji

    (Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
    National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China)

  • Tingcheng Zhao

    (Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
    National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China)

  • Yusheng Li

    (Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
    National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China)

  • Zhiyong Ai

    (National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China
    Hunan Hybrid Rice Research Center, Changsha 410125, China)

Abstract

Soil salinization negatively affects rice growth and yield; however, how different sludge sources regulate rice growth and yield under salt stress was rarely investigated. This study evaluated the performance of two salt-tolerant rice cultivars, Chaoyou 1000 and Longliangyou 506, grown in two sediment sources, pond sediment (PS) and river sludge (RS), under salt stress (56 ds m −1 brine irrigation) with conventional soil (CS) used as the control. The results showed that the rice yield under the PS and RS treatments was enhanced by 51.0% and 43.6% as compared with CS, respectively, owing to an improvement in spikelet per panicle, 1000-grain weight, dry matter accumulation, and the chlorophyll content in both rice cultivars. Compared with CS, the total nitrogen accumulation, nitrogen grain production efficiency, nitrogen harvest index, and nitrogen partial productivity under the PS and RS treatments were increased by 18.9–28.9%, 17.0–20.6%, 7.2–16.6%, and 43.8–50.9%, respectively. Moreover, rice grown in PS and RS showed higher activities of nitrogen metabolism-related enzymes (nitrate reductase, glutamine synthetase, and glutamate synthetase) at the heading stage and higher K + and K + /Na + contents in the leaves. Overall, a balanced utilization of sediment resources (especially pond sediment) can effectively alleviate salt stress and improve the yield and nitrogen use efficiency in rice.

Suggested Citation

  • Shenghai Cheng & Aibin He & Xiayu Guo & Rongyi Li & Jianbo Wang & Yucheng Qi & Pengfei Zhang & Weixu Tao & Junchao Ji & Tingcheng Zhao & Yusheng Li & Zhiyong Ai, 2024. "Rational Utilization of Sediment Resources Improves Rice Yield and Nitrogen Use Efficiency under Salt Stress," Agriculture, MDPI, vol. 14(2), pages 1-15, February.
    • Handle: RePEc:gam:jagris:v:14:y:2024:i:2:p:283-:d:1336646
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    References listed on IDEAS

    as
    1. Jiao Lyu & Xinyi Wang & Shengnan Hou & Anwar Zeb & Hui Zhu & Yingying Xu, 2023. "Content Variation and Potential Runoff Loss Risk of Nutrients in Surface Water of Saline-Alkali Paddy in Response to the Application of Different Nitrogen Fertilizer Types," Sustainability, MDPI, vol. 15(9), pages 1-16, April.
    2. Li, Yong & Gao, Yingxu & Ding, Lei & Shen, Qirong & Guo, Shiwei, 2009. "Ammonium enhances the tolerance of rice seedlings (Oryza sativa L.) to drought condition," Agricultural Water Management, Elsevier, vol. 96(12), pages 1746-1750, December.
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