【摘要】 在盆栽条件下,研究了施N水平对雪茄外包皮烟叶片生长发育和内源激素含量的影响.结果显示:(1)施N水平的提高可以增加叶片总N含量,每株5 g的施N量能显著提高雪茄外包皮烟叶片中叶绿素的含量,促进烟叶面积的增加.(2)叶片中内源激素含量对施N量的响应不同,CTK含量、CTK/ABA和叶绿素含量与叶片中总N含量呈极显著正相关.(3)烟叶中内源激素水平明显地控制着烟叶的发育,ABA含量与叶面积呈极显著正相关,CTK、GA含量与叶片叶绿素含量呈极显著正相关.研究表明,雪茄外包皮烟叶片生长发育、内源激素的含量及平衡与施氮水平关系密切,改善N肥用量可以调控叶片中内源激素含量,进而影响叶片的生长发育.更多还原

【Abstract】 The pot experiments were conducted to study the effects of nitrogen levels on growth and content of endogenous hormones of cigar wrapper leaves.The results showed:(1) Promoting the nitrogen applying could increase the N content and chlorophyll content in leaves and could also enlarge leaf area of cigar wrapper leaves.(2) CTK content,CTK/ABA and chlorophyll content had a terribly significantly positive coefficient with nitrogen content in leaves.(3) ABA content had a terribly significantly positive coefficient with leaf area,as well as a terribly significantly negatively coefficient with chlorophyll content;CTK and GA content had a terribly significantly positive coefficient with chlorophyll content.The growth of leaf,endogenous hormone content and its balance were closely related to nitrogen applying.Improving the level of nitrogen fertilizer applying can adjust and control the endogenous hormone content in leaves,thus affect the leaves growth.更多还原