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Purpose <p>Conventional potassium fertilisers, including potassium nitrate and potassium sulphate, are poorly taken up, and concentrated applications negatively affect soil ecology. Sorbitol-chelated-potassium is chelated with potassium ions using sorbitol as a ligand, which can effectively promote potassium transport in plants and quickly replenish nutrients. This study aimed to compare the effects of spraying sorbitol-chelated-potassium and conventional potassium on peanut yield, quality, potassium accumulation, and the composition and diversity of soil microbial communities.</p> Methods <p>A two-year field fertilization trial was conducted in Qingdao using peanuts as the test crop. The six treatments were: clear-water (CK, control), sorbitol-chelated-potassium (SK, lab-made), sugar-alcohol-chelated potassium (LK, external product), potassium sulphate (IK), potassium nitrate (NK) and potassium acetate (AK, organic potassium).</p> Results <p>Foliar application of sorbitol-chelated-potassium contributed to significantly higher peanut yields compared to potassium sulfate, potassium nitrate, and potassium acetate treatments, resulting in 16.94%, 27.05%, and 23.20% higher average yields respectively. Meanwhile, spraying with sorbitol-chelated-potassium enhanced the crude fat and protein content of peanut but the difference was not significant. Spraying with sorbitol-chelated-potassium promoted the percentage of dry-matter accumulation and potassium accumulation in peanut kernels. Rhizosphere soil microorganism diversity increased after the sorbitol-chelated-potassium treatment. The Chloroflexi and Actinobacteriota were positively correlated with yield. Meanwhile, the Gemmatimonadota, Entotheonellaeota, Actinobacteriota and Methylomirabilota were positively correlated with potassium accumulation in roots.</p> Conclusion <p>Spraying with sorbitol-chelated-potassium improved peanut absorption of potassium to improve peanut yield and quality. and the diversity of the peanut rhizosphere soil microbial community, compared with potassium nitrate, potassium sulphate, potassium acetate and sugar-alcohol-chelated potassium treatments.</p>

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Responses of Peanut Growth and Microbial-community Diversity in Rhizosphere Soil to Foliar Sorbitol-chelated-potassium

  • 期刊论文

  • 发表日期：

    2025年7月23日

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  • Huanyang Zhang,
  • Chuanhao Han,
  • Qianqian Wei,
  • Tengsheng Li,
  • Fanhe Zeng,
  • Li Zhao,
  • Xiang Shi,
  • Jing Zhang,
  • Ziqi Zhang,
  • Dongyun Yan

摘要

Purpose

Conventional potassium fertilisers, including potassium nitrate and potassium sulphate, are poorly taken up, and concentrated applications negatively affect soil ecology. Sorbitol-chelated-potassium is chelated with potassium ions using sorbitol as a ligand, which can effectively promote potassium transport in plants and quickly replenish nutrients. This study aimed to compare the effects of spraying sorbitol-chelated-potassium and conventional potassium on peanut yield, quality, potassium accumulation, and the composition and diversity of soil microbial communities.

Methods

A two-year field fertilization trial was conducted in Qingdao using peanuts as the test crop. The six treatments were: clear-water (CK, control), sorbitol-chelated-potassium (SK, lab-made), sugar-alcohol-chelated potassium (LK, external product), potassium sulphate (IK), potassium nitrate (NK) and potassium acetate (AK, organic potassium).

Results

Foliar application of sorbitol-chelated-potassium contributed to significantly higher peanut yields compared to potassium sulfate, potassium nitrate, and potassium acetate treatments, resulting in 16.94%, 27.05%, and 23.20% higher average yields respectively. Meanwhile, spraying with sorbitol-chelated-potassium enhanced the crude fat and protein content of peanut but the difference was not significant. Spraying with sorbitol-chelated-potassium promoted the percentage of dry-matter accumulation and potassium accumulation in peanut kernels. Rhizosphere soil microorganism diversity increased after the sorbitol-chelated-potassium treatment. The Chloroflexi and Actinobacteriota were positively correlated with yield. Meanwhile, the Gemmatimonadota, Entotheonellaeota, Actinobacteriota and Methylomirabilota were positively correlated with potassium accumulation in roots.

Conclusion

Spraying with sorbitol-chelated-potassium improved peanut absorption of potassium to improve peanut yield and quality. and the diversity of the peanut rhizosphere soil microbial community, compared with potassium nitrate, potassium sulphate, potassium acetate and sugar-alcohol-chelated potassium treatments.