Effects of “Straw Mulching after Plastic Film Uncovered” Technique on Yield,Quality and Aroma Components of Flue-cured Tobacco Planted in Purple Soil Upland

A field experiment was carried out to study the effects of different mulch methods on growth,yield and quality of flue-cured tobacco planted in purple soil upland.The results indicated that at the flue-cured tobacco maturing stage,the straw mulching after film uncovered technique decreased soil temperature,maintained soil moisture and increased the photosynthetic rate.At the same time,it remarkably increased yield,economic value and the total content of aroma components.