Abstract: During 2009 and 2010,a field experiment was employed to study the changes of agronomic characteristics, enzyme activity in carbon and nitrogen and photosynthetic characteristics and quality of flue-cured tobacco under planting density,K application and their interactions using the tobacco cultivar Jiyan No.9(local cultivars) in Yanminghu town in Dunhua. The results was followed:
1. The study of agronomic characteristics
With the increase of planting density, leaf area and number per plant,...