生态因子对烤烟品种发育特性的影响

Influence of main ecological factors on development character of flue－cured tobacco variety

采用温室、田间、不同生态区域种植和短日照处理的方法，研究了温度、光照等主要生态因子对烤烟品种G－80、K326、NC82和NC89发育特性的影响。结果表明，这些品种在温室栽培比田间延迟现蕾29～57 d，增加100 ℃活动积温可延迟现蕾2．2～2．3 d，证明较高温度能明显促进烤烟生长，抑制其发育进程；经短日照处理后，烟株现蕾明显提前，生育期缩短，敏感叶位为第11～13叶，说明烤烟品种具有一定的短日性；通径分析表明，有效积温是影响叶片发生、生长和成熟的主导因子，达极显著水平（P1y＝0．995，r1y＝0．993）。

Influence of main ecological factors temperature, daylength etc． on the development character of flue－cured tobacco varieties G－80、K326、NC82 and NC89 of flue－cured tobacco was studied by cultivation in greenhouse, field, different ecological areas and under short－day． The results showed that bud appearing stage delayed 29～57 days in greenhouse than in field． It delayed 2．2～2．3 days when the active accumulated temperature raised 100 ℃． Higher temperature could accelerate growth and control development of flue－cured tobacco． The growth period of these varieties was shortened, bud appearing stage arrived earlier, the sensitive leaves were 11th～13th under short－day． These varieties were partially sensitive to short－day． Path coefficient－analysis P1y＝0．995, r1y＝0．993 proved that the effective accumulated temperature was a main factor affecting occurrence, growth and maturity of leaf．