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

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 0.70~0.80comprehensive index was beneficial 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.