Tobacco variety is widely adapted to various regional conditions, but only planted in areas with the right natural conditions, where the tobacco variety could fully show its potential of its quantity and quality. Photosynthesis of tobacco plant is one of the most important factors that affect the yield and quality of the leaves. As a result, comparative study of the photosynthetic characteristics of plant in different ecosystem areas is very important for choosing the proper varieties for different tobacco growing places to obtain the best economic efficiency. Comparative experiments were cond...
