【作者】 靳冬梅； 叶协锋； 刘国顺； 朱海滨； 赵春华；

【Author】 JIN Dong-mei, YE Xie-feng, LIU Guo-shun, ZHU Hai-bin, ZHAO Chun-hua (National Tobacco Cultivation and Physiological and Biochemical Research Center, Henan Agricultural University, Zhengzhou 450002, China)

【机构】 河南农业大学国家烟草栽培生理生化研究基地；

【摘要】 2004年,采用K326包衣种子,在河南农业大学科教园区采用漂浮育苗方式进行了不同营养液浓度对烤烟烟苗生长及生理特性影响的研究。试验设8个处理(以氮含量计算): 0mg/L,50mg/L,75mg/L,100mg/L,125mg/L,150mg/L,175mg/L,200mg/L。结果表明,播种后30d 和35d,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45d和50d,在100-150mg/L范围内烟苗的各植物学性状表现较好。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0-125mg/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125mg/L又呈下降趋势;INV活性在整个苗期都呈先降后增趋势,在150mg/L时活性最弱。更多还原

【Abstract】 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. The treatments (calculated by nitrogen concentration) were: Omg/L(no fertilizer), 50mg/L, 75mg/L, 100mg/L, 125mg/L, 150mg/L, 175mg/L, 200mg/L .The fertilizer contains many kinds of microelements, provided by Ye-xian county floating system materials factory. The fertilizer ratio was 20-10-20 (N-P2O5-K2O). 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 at 125mg/L could make a better growth of tobacco seedlings. At 46 days, NR activities decreased with the increasing of nutrient solution concentration, Except that, NR activities and the contents of water-soluble protein in the whole period increased with the increasing of fertilizer levels within 0mg/L to 125mg/L, then decreased over 125mg/L. INV activities decreased within 0-150mg/L, then increased over 150mg/L in the whole seedling period.更多还原