不同浓度营养液对烤烟漂浮育苗烟苗生长及生理特性的影响  

Effects of Nutrient Solution Concentration on Growth and Physiological Characteristics of Flue-cured Tobacco Seedlings in the Floating System

作　　者：靳冬梅[1] 叶协锋[1] 刘国顺[1] 朱海滨[1] 赵春华[1] 

机构地区：[1]河南农业大学国家烟草栽培生理生化研究基地,河南郑州450002

出　　处：《华北农学报》2005年第6期15-19,共5页Acta Agriculturae Boreali-Sinica

基　　金：国家烟草专卖局资助项目(9901007)

摘　　要：试验采用漂浮育苗方式对K326包衣种子进行了不同浓度营养液对烤烟烟苗生长及生理特性的影响进行了研究.试验设8个处理(以氮含量计算)0,50,75,100,125,150,175,200mg/L.结果表明,播种后30 d和35 d,随着营养液浓度的增加,烟苗的株高、叶数、一级侧根、二级侧根、根体积和干物质重依次增加;播种后45 d和50 d,在100～150 mg/L范围内烟苗的各生物学性状表现较好.播种后46d,随营养液浓度的增加,NR活性逐渐下降,除此以外,在0～125 mg/L范围内可溶性蛋白质含量和NR活性在整个苗期随营养液浓度的增加逐渐上升,超过125 mg/L又呈下降趋势;INV活性在整个苗期都呈先降后增趋势,在150 mg/L时活性最弱.In 2004, the effects of fertilizer concentration on growth and physiological characteristics of flue-cured tobacco seedlings in the floating system were studied with K326 coated seeds. The treatments （calculated by nitrogen concentration） were： 0（no fertilizer） ,50,75,100,125,150,175and 200 mg/L .The fertilizer contains many kinds of mi- croelements, provided by Ye-xian county floating system materials factory. The fertilizer ratio was 20 - 10 - 20 （N - P2O5 - K2O）. The results showed that at 30 and 35 days after seedling, with the increasing of nutrient solution concentration, stem length, number of leaves, plant dry weight and the number of first-order and second-order lateral roots of seedlings increased;at 45 and 50 days after seedling, Fertilizer within 100- 150 mg/L could make a better growth of tobacco seedlings. At 46 days, NR activities decreased with the increasing of nutrient solution concentration, except which, NR activities and the contents of water-soluble protein in the whole period increased with the increasing of fertilizer levels within 0- 125 mg/L, then decreased over 125 mg/L. INV activities decreased from 0 - 150 mg/L, then increased over 150 mg/L during the whole seedling period.

关 键 词：烤烟 漂浮育苗 生长 生理特性 营养液 浓度 

分 类 号：S572.01[农业科学—烟草工业]