不同揭膜破膜时间与方式对烤烟生长及品质的影响

Effects of Different Uncovering Film Pattern and Time on Growth and Quality of Tobacco

为了探明不同揭膜破膜时间与方式对烤烟生长及品质的影响，采用田间试验方法，在烤烟团棵期设揭膜培土和破膜培土、现蕾期设揭膜培土和破膜培土以及全生育期不揭膜的方式对其进行了试验研究。结果表明：破膜处理烟株整体长势和烟叶品质较好，其中，以团棵期破膜培土处理烟株在株高、茎围、节距和大田生育期等方面都优势明显，其外观质量整体表现最好，内在化学成分协调性好，其综合指数为0．70～0．80，有利于糖含量有效积累和烟碱及氮含量趋于合理化。综合考虑，在烤烟团棵期（成苗移栽后40d）破膜培土其综合品质和经济效益较好。

The effects of different uncovering film pattern and time on tobacco growth and quality were studied under uncovering film and broken film at resettling stage, uncovering film and broken film at budding stage and non-uncovering film during total growth period in tobacco field. The results showed that the broken film pattern had good effects on tobacco growth and quality. The height, stem diameter, internode distance and growth period of tobacco plants treated by the broken film pattern at resettling stage were of significant superiority and its good appearance quality and good chemical component harmony with 0.70-0.80 comprehensive index was benefieial to sugar effective accumulation and rational nicotine and nitrogen content. In conclusion, the broken film pattern at tobacco resettling stage can acquire better comprehensive quality and economical benefit.