Effects of different cultivation patterns on quality, output and yield of characteristic tobacco in Xingyi city.

Three cultivation patterns were tested in cultivation of Yunyan 85(a tobacco variety) to study the effects on its quality,output and yield.The results showed that the plant type and grade structure of tobacco leaves is reasonable,the proportion of the first and middle grade tobacco leaves is high,the output and yield is the highest,the exterior character of tobacco leaves is better and its interior chemical components are balanced under the cultivation pattern with expanding row spacing,reducing plant spacing,high plant density and lower application level.