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

Lijuan Deng, Duoji Wu, Weiqi Yuan, Zongqiang Wei, Yanlan Huang, Zhihua Hu and Jianfu Wu
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Lijuan Deng: College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang, 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
Jianfu Wu: College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang, P.R. China

Plant, Soil and Environment, 2025, vol. 71, issue 12, 891-904

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.

Keywords: productivity; nutrient management; targeted fertilisation strategy; yield-quality trade-off (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:71:y:2025:i:12:id:315-2025-pse

DOI: 10.17221/315/2025-PSE

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