首页 | 本学科首页   官方微博 | 高级检索  
     检索      

缺钾对烤烟氮素吸收利用的影响
引用本文:杜玉海,孙志伟,王晓琳,何仲秋,张硕,闫慧峰.缺钾对烤烟氮素吸收利用的影响[J].中国农业科技导报,2019,21(3):141-145.
作者姓名:杜玉海  孙志伟  王晓琳  何仲秋  张硕  闫慧峰
作者单位:1.潍坊烟草有限公司临朐分公司, 山东 临朐 262600; 2.中国农业科学院烟草研究所, 农业农村部烟草生物学与加工重点实验室, 山东 青岛 266101; 3.青岛农业大学资源与环境学院, 山东 青岛 266109
基金项目:国家重点研发计划项目(2018YFD0201100);中国烟草总公司山东省公司面上科技项目资助。
摘    要:为探明烤烟钾素营养与氮吸收同化能力的关系,明确钾素营养与氮同化互作的可能作用途径,为合理施用钾肥提供理论基础,以烤烟品种K326为试验材料,分析了营养液培养条件下,缺钾后烟草各器官干物质和氮积累量的变化情况,根系形态及根系氮硝酸盐吸收速率和硝酸还原酶活性的变化情况。结果表明,缺钾后烤烟茎和叶片的干物质积累量降低,根系干物质积累量无显著变化;缺钾降低了烤烟总根长、根系体积和根表面积,根平均直径无显著变化;缺钾降低烤烟茎和叶片中的氮积累量,增加氮在根系中的分配,降低在茎中的分配;缺钾处理后根系硝酸盐吸收速率和硝酸还原酶活性显著增加。综上,缺钾后烤烟氮积累量降低的主要原因是由于干物质积累量减少导致植物氮需求减少。

关 键 词:缺钾  根系形态  氮吸收  氮同化  

Influence of Potassium Deficiency on Nitrogen Absorption and Assimilation in Flue-cured Tobacco
DU Yuhai,SUN Zhiwei,WANG Xiaolin,HE Zhongqiu,ZHANG Shuo,YAN Huifeng.Influence of Potassium Deficiency on Nitrogen Absorption and Assimilation in Flue-cured Tobacco[J].Journal of Agricultural Science and Technology,2019,21(3):141-145.
Authors:DU Yuhai  SUN Zhiwei  WANG Xiaolin  HE Zhongqiu  ZHANG Shuo  YAN Huifeng
Institution:1.Linqu Tobacco Branch of Weifang Tobacco Corporation, Shandong Linqu 262600; 2.Key Laboratory of Tobacco Biology and Processing, Ministry of Agriculture and Rural Affairs; Tobacco Research Institute, Chinese Academy of Agricultural Sciences; Shandong Qingdao 266101; 3.College of Resources and Environment Science, Qingdao Agricultural University, Shandong Qingdao 266109, China
Abstract:In order to investigate the relationship between potassium nutrition and nitrogen absorption and assimilation ability of flue-cured tobacco, and make clear the possible pathway of interaction between potassium nutrition and nitrogen assimilation, so as to provide a theoretical basis for rational application of potassium fertilizer, this paper took flue-cured tobacco K326 as experimental material, and analyzed the changing of nitrogen and dry matter accumulation in different plant organs, root morphology, root NO-3 absorption rate and root nitrate reductase (NR) activity after potassium deficiency under nutrient solution culture condition. The result showed that dry matter accumulation in stems and leaves decreased significantly under potassium deficiency condition, but there was no significant change in dry matter accumulation of root system. Potassium deficiency shortened the total root length, and reduced root surface area and root volume, but the average root diameter did not change much. Potassium deficiency brought down the nitrogen accumulation in stems and leaves, increased the N allocation rate in root system and decreased the N allocation rate in stems. Potassium deficiency increased the root NO-3 absorption rate, thus the NR activity in root system was significantly increased. In conclusion, the main reason for the decrease of nitrogen accumulation in flue-cured tobacco under potassium deficiency is that the reducing of plant nitrogen demand due to the decrease dry matter accumulation.
Keywords:potassium deficiency  root system morphology  nitrogen absorption  nitrogen assimilation  
本文献已被 CNKI 等数据库收录!
点击此处可从《中国农业科技导报》浏览原始摘要信息
点击此处可从《中国农业科技导报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号