Journal of Zhejiang Agricultural Sciences ›› 2025, Vol. 66 ›› Issue (11): 2601-2606.DOI: 10.16178/j.issn.0528-9017.20240061

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Effects of potassium fertilizer application rate on potassium accumulation in tobacco plants and soil microbial community

XIE Yanfen1(), HUANG Yue2, ZHAO Yuting1, ZHANG Yanyan1, ZHANG Guohong1, FANG Zhipeng1, WANG Wenbo1, XU Desheng1, HAN Jiabao1,*(), WANG Na2,*()   

  1. 1 Luliang Branch of Qujing Tobacco Company, Luliang 655699, Yunnan
    2 College of Tobacco Science, Yunnan Agricultural University, Kunming 650201, Yunnan
  • Received:2024-01-18 Online:2025-11-11 Published:2025-12-01

Abstract:

To investigate the effects of potassium fertilizer application rate on potassium accumulation in tobacco plants and soil microbial communities, a field experiment was conducted in Qujing City, Yunnan Province. The study examined the response characteristics of potassium accumulation in tobacco plants, soil nutrients, and enzyme activities under different potassium fertilizer application rates, and explored their interactions with the structure of the soil microbial community. The results showed that the potassium fertilizer application rate affected soil nutrient content and potassium accumulation in tobacco plants, leading to changes in the soil microbial community. N2 treatment(total pure potassium application of 421.5 kg·hm-2) resulted in the highest potassium accumulation in tobacco leaves, which was significantly (p<0.05) higher than that of the N3 treatment (total pure potassium application of 538.5 kg·hm-2). N2 treatment enriched potassium-releasing bacterial genera such as Gemmatimonas, Acinetobacter, Bacillus, Nitrospira, and Pseudomonas, which increased the soluble potassium content in the soil and thereby enhanced potassium accumulation in tobacco leaves. This study provides a theoretical basis for the scientific management of soil nutrients and the effective improvement of potassium content in tobacco leaves in Yunnan tobacco-growing areas.

Key words: potassium fertilizer, potassium accumulation, soil microorganisms, tobacco

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