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Exploring the impact of potassium fertiliser rate and split ratio on rice yield and quality in China: a meta-analysis

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  • Lijuan Deng

    (College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang, P.R. China
    Jiangxi Environmental Engineering Vocational College, Ganzhou, P.R. China)

  • Duoji Wu

    (College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang, P.R. China)

  • Weiqi Yuan

    (College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang, P.R. China)

  • Zongqiang Wei

    (College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang, P.R. China)

  • Yanlan Huang

    (College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang, P.R. China)

  • Zhihua Hu

    (College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang, P.R. China
    Jiangxi Institute of Red Soil and Germplasm Resources, Nanchang, P.R. China)

  • Jianfu Wu

    (College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang, P.R. China)

Abstract

Potassium (K) is crucial for rice yield and quality, but continuous yield increase reduces protein content, challenging the balance between high yield and quality. This study analysed 3 178 case studies (1994-2024) on K management impacts on rice yield, grain protein, and amylose content, evaluating effects of K fertiliser rates, base-topdressing ratios, planting regions, and soil properties. The results showed that K application significantly increased rice yield, protein content and amylose content by 11.6, 2.0 and 1.0%, respectively. Importantly, we identified targeted K fertilisation strategies tailored to different quality goals: optimising for eating quality, nutritional quality, or synergistic improvement of yield and comprehensive quality. This study provides a scientific basis for precision K management to help growers balance rice yield with specific quality needs.

Suggested Citation

  • Lijuan Deng & Duoji Wu & Weiqi Yuan & Zongqiang Wei & Yanlan Huang & Zhihua Hu & Jianfu Wu, . "Exploring the impact of potassium fertiliser rate and split ratio on rice yield and quality in China: a meta-analysis," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 0.
    • Handle: RePEc:caa:jnlpse:v:preprint:id:315-2025-pse
    DOI: 10.17221/315/2025-PSE
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