Field experiments were conducted to study the effects of plastic film un-covering and intertill, mode of plantation and uniconazole spray on the growth, yield and quality of oriental tobaccos . It showed that uncover plastic film and intertill, uniconazole spray improved the transverse growth of stems, reduced the height of plants and reduced the square of leaves, but mode of plantation had a slight effects on biological properties of oriental tobaccos. All practice increased dry matter accumuation, contents of chlorophyll, vigor of roots and root to shoot ratio. At the same time, they also reduced contents of total sugar in leaves, increased contents of nicotin and K, improved internally chemical components and harmonized the scales of sugar and nicotin. Comparing with the controls, uncovering plastic film increased the output value by 16.9%. With uniconazole spraying, the best result of 15 mg/kg was obtained, which improved the output value by 7.6%.
Acta Tabacaria Sinica
Cultivation practice Oriental tobacco Growth Yield and quality