打顶后NAA处理对烟草生长烟叶中钾和烟碱浓度的影响  

Effects of NAA Application after Removing the Shoot Apex on Growth,K+ and Nicotine Concentrations in Component Tissues of Flue-cured Tobacco Plants

作　　者：冀宏杰[1,2] 李春俭[1] 徐慧[1] 张福锁[1] 洪丽芳[3] 张俊 

机构地区：[1]中国农业大学植物营养系/农业部植物营养学重点开放实验室,北京100193 [2]中国农业科学院农业资源与农业区划研究所/农业部植物营养与养分循环重点开放实验室,北京100081 [3]云南省农科院土壤肥料研究所,昆明650231 [4]云南省曲靖市麒麟区土壤肥料工作站,云南曲靖655000

出　　处：《中国农学通报》2008年第12期274-279,共6页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金项目"打顶及采收对烤烟体内烟碱合成的影响及其调节"(30370842);"烤烟体内钾循环;生长后期钾的再分配及其影响因素研究"(30070452);云南省省院省校合作项目"云南烤烟钾吸收;循环;再分配规律及提高烟叶钾含量的关键措施研究"资助

摘　　要：在云南省田间连续三年研究了打顶后在茎断面涂抹萘乙酸(NAA)处理对烤烟植株生长、钾素吸收、烟叶中钾和烟碱浓度的影响。结果表明,打顶导致烟株中的钾素损失,烟叶中钾浓度下降,烟碱浓度增加。打顶后在茎断面用NAA处理可以增加烟株对钾素的吸收,促进钾素向叶片中分配,使叶片钾浓度提高;同时降低叶片烟碱浓度。第一次NAA处理两周后用NAA再处理一次虽然可以进一步提高烟叶钾浓度,但使叶片干重稍有下降,且在操作上多一道工序。若开花后不打顶,虽然叶片中钾浓度较高,但大大降低了叶片干物重,严重影响叶片的产量和品质。Field experiments were conducted in three years（1999,2000 and 2001）in Yunnan province to study the effects of NAA application after removing the shoot apex on plant growth,K＋and nicotine concentrations in different organs of flue-cured tobacco.The results showed that,excision of the shoot apex caused a net decrease in total K＋content of whole plant,a decrease in K＋concentration while an increase in nicotine concentration in different leaves.Application of NAA onto the cut-surface of the stem after removal of the shoot apex stimulated K＋ uptake and distribution into the leaves,resulted in increase in K＋concentration and decrease in nicotine concentration in different leaves.Applying NAA twice（once again two weeks after the first application）could further improve leaf K＋concentration,but cause a slight decrease in leaf dry weights.Keeping plant intact（no removing the shoot apex）resulted lower leaf dry weights and yield,and poor leaf quality,compared with the apex-removed plants,although the leaf K＋concentration was higher in the intact plants.NAA application one time after removal of the shoot apex was enough for increasing in K＋ concentration and decreasing in nicotine concentration in tobacco leaves.

关 键 词：萘乙酸 烤烟 钾浓度 烟碱 打顶 

分 类 号：S14[农业科学—肥料学] S572[农业科学—农业基础科学]