Effects of Planting Density and Organic Fertilizer Application on Physical Characteristics and Chemical Components of Tobacco in Chenzhou City under Organic Farming Mode

Two random block experiments were conducted to investigate the effects of main organic cultivation technologies, including different application rates of organic fertilizers (233.33, 300 and 366.67 kg/667m²) and different planting density (three levels respectively for plant and row spacing). Stepwise regression analysis was used to screen the experiment treatment in which the physical characteristics and chemical components of strong aroma tobacco being at optimum values. The results showed that better physical characteristics and chemical components were obtained when the planting density had the space collocation of 0.5 m×1.2 m and 0.6 m×1.1 m, and the organic fertilizing rates were within the range of 300.62-355.13 kg/667m².