涝害对云烟87茎叶的影响研究

STUDY ON EFFECT OF WATERLOGGING ON STEMS AND LEAVES OF FLUE-CURED TOBACCO OF YUYAN87

水分过多容易引起涝害,抑制烟叶生长。长时间涝害,植株萎焉,甚至死亡。2009—2010年以云烟87为材料,采用盆栽栽培,在云烟87团棵期、旺长期、现蕾期进行涝害的处理试验,涝害时间设为24 h、48 h、72 h、120 h和CK(对照),研究了不同涝害时间对云烟87不同生育期生长的影响。结果表明,团棵期、旺长期、现蕾期受涝72 h,对株高生长没有影响,但单叶面积下降超过20%,茎围生长开始下降;受涝120 h,株高生长开始受到抑制,团棵期、旺长期、现蕾期单叶面积分别下降78%、88%、89%。云烟87耐涝时间为72 h之内,受涝120 h以后,所有农艺性状指标迅速下降。

Flue-cured tobacco is very sensitive to the waterlogging,which will bring great loss to the growth and production. It is important to study the effect of different levels of waterlogging on the growth of flue-cured tobacco in different growth stage which can help to guide the production of flue-cured tobacco and the water management in the field. Flue-cured tobacco of Yuyan87 is studied respectively in resettling growth stage, vigorous growth stage and budding stage in 2009--2010 by planning the waterlogging period. The waterlogging period is set to 24 h,48 h,72 h,120 h and the control group. The result showed that the growth of plant height in the three growth stages are not influenced by the 72 h wateringlogging, but single leaf area would decrease more than 20%, and the growth of stem girth would decrease. When the period of waterlogging is set to 120 h, the growth of plant height would be inhibited, and the single leaf areas will decrease respectively by 78%, 88% and 89% in resettling growth stage, vigorous growth stage and budding stage. The limit of Yuyan87 to endure the period of waterlogging is less than 72 h. If the waterlogging period is set to 120 h, all the agronomic character index will decrease rapidly.