湖北农业科学 ›› 2026, Vol. 65 ›› Issue (3): 64-71.doi: 10.14088/j.cnki.issn0439-8114.2026.03.010

• 资源·环境 • 上一篇    下一篇

水钾耦合对烤烟吸收利用钾素的影响

汤宏1,2, 曾掌权3, 王建伟2, 刘伦沛2, 唐开钊2, 冷丽娟2   

  1. 1.广西蚕桑生态学与智能化技术应用重点实验室/广西现代蚕桑丝绸协同创新中心/微生物及植物资源开发利用广西高校重点实验室/河池学院化学与生物工程学院,广西 河池 546300;
    2.凯里学院理学院,贵州 凯里 556011;
    3.湖南省林业科学院湖南衡山森林生态系统定位观测研究站,长沙 410004
  • 收稿日期:2025-08-23 出版日期:2026-03-25 发布日期:2026-04-09
  • 通讯作者: 曾掌权(1976-),男,湖南益阳人,副研究员,博士,主要从事农林土壤生态研究,(电子信箱)zzq7601@126.com。
  • 作者简介:汤 宏(1974-),男,湖南益阳人,教授,博士,主要从事土壤化学与生态环境及土壤肥力方面的研究,(电子信箱)th741113@126.com。
  • 基金资助:
    黔东南州基础研究计划项目(黔东南科合基础([2022]15号); 贵州省科学技术基金项目(黔科合LH字[2014]7220); 河池学院高层次人才科研启动项目(2023GCC019); 国家自然科学基金地区科学基金项目(31760191)

Effect of water-potassium coupling on potassium uptake and utilization of flue-cured tobacco

TANG Hong1,2, ZENG Zhang-quan3, WANG Jian-wei2, LIU Lun-pei2, TANG Kai-zhao2, LENG Li-juan2   

  1. 1. Guangxi Key Laboratory of Sericulture Ecology and Applied Intelligent Technology/Guangxi Collaborative Innovation Center of Modern Sericulture and Silk/Guangxi Colleges and Universities Key Laboratory of Exploitation and Utilization of Microbial and Botanical Resources/School of Chemistry and Bioengineering, Hechi University, Hechi 546300, Guangxi, China;
    2. School of Science, Kaili University, Kaili 556011, Guizhou, China;
    3. Hengshan Research Station of Forest Ecosystem, Hunan Academy of Forestry, Changsha 410004, China
  • Received:2025-08-23 Published:2026-03-25 Online:2026-04-09

摘要: 为了合理利用水钾资源,以贵州省黔东南苗族侗族自治州烤烟种植区为研究区,探讨不同水钾耦合模式对烤烟吸收利用钾素养分的影响。采用田间小区试验,设置 3种灌溉水平(灌水量分别为0.50、1.00、2.00 L/株)及3个施钾水平(K2O施用量分别为135、270、405 kg/hm2),分析施钾量和灌水量对烤烟钾素养分吸收利用的影响。结果表明,烟株各器官钾素积累量、全株积累量和阶段积累量整体上均随施钾量和灌水量的增加而增加;各器官对钾的吸收量及钾在各器官中的分配比例表现为叶>茎>根;烟株对钾素的吸收量和积累强度在不同生育期存在差异,主要集中在旺长期,烟叶是钾素的主要吸收积累器官;钾肥偏生产力随施钾量的增加而降低,钾收获指数以中高灌溉水平及施钾水平较高,灌溉水分利用效率随施钾量和灌水量的增加而降低。从节水节肥和烟株吸收钾素的效果考虑,施钾水平为270 kg/hm2与灌水量为1.00、2.00 L/株的耦合处理更有利于提高研究区烤烟对钾素的吸收利用。

关键词: 灌水量, 施钾量, 耦合效应, 烤烟, 钾素, 吸收, 利用

Abstract: To make reasonable use of water and potassium resources, the Qiandongnan Miao and Dong Autonomous Prefecture of Guizhou Province was selected as a study area to explore the effects of different water-potassium coupling modes on the absorption and utilization of potassium nutrients in flue-cured tobacco. A field plot experiment was conducted with three irrigation levels (0.50, 1.00, and 2.00 L per plant) and three potassium application levels (K2O application rates of 135, 270, and 405 kg/hm2). The effects of potassium application rate and irrigation amount on the absorption and utilization of potassium nutrients in flue-cured tobacco were investigated. The results showed that the accumulation of potassium in various organs, whole plant and stage of tobacco plants increased with the increase of the potassium application rate and irrigation amount. The absorption of potassium by different organs and its distribution proportion among organs followed the order: leaves > stems > roots. The absorption and accumulation intensity of potassium in tobacco plants were different at different growth stages, mainly concentrated in the vigorous growth period, and tobacco leaves were the main absorption and accumulation organs of potassium. The partial productivity of potassium fertilizer decreased with the increase in potassium application rate, while the potassium harvest index was better under medium-high irrigation and potassium application levels. The irrigation water use efficiency decreased with the increase in potassium application rate and irrigation amount. From the perspective of saving water and fertilizer and potassium absorption by tobacco plants, the coupling treatments of a potassium application rate of 270 kg/hm2 with irrigation amounts of 1.00 L/plant or 2.00 L/plant were more conducive to enhancing the absorption and utilization of potassium by flue-cured tobacco in the study area.

Key words: irrigation amount, potassium application rate, coupling effect, flue-cured tobacco, potassium, uptake, utilization

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