苗期低温诱导对烤烟生长发育的影响

Effects of Low Temperature on Growth and Development of Flue-cured Tobacco in Seeding Stage

在姚安县栋川镇进行了烤烟苗期低温诱导对烟株生长发育的影响研究。结果表明,低温对烟草早花的诱导效果有累积效应,苗龄45 d时低温处理10 d能促进早花发生;苗龄60、65 d时低温处理5 d的早花现象不明显,而苗龄55 d时低温处理5 d则会抑制烟草开花;经过低温处理的烟株叶片明显小于正常烟株,有效叶片数和干物质量大幅减少。

Experiment was carried out to study the effects of low temperature on the growth and development of flue-cured tobaccos in Dongchuan Town of Yaoan County.The results showed that low temperature showed accumulative effects on the premature flower of flue-cured tobaccos.10 days’low-temperature treatment could promote the emergence of spremature flower at the seedling age of 45 days,while 5 days’low-temperature treatment could inhibit the emergence of premature flower at the seedling age of 55 days.And there was no significant effects on 5 days’treatment at the seedling age of 60 and 65 d.Tobacco leaves under low temperature treatment were smaller than normal ones,the number of effective leaves and dry matter amount were evidently reduced.