Effects Of Planting Density And Nitrogen Application Rate On Tobacco Yield And Quality Under Organic Cultivation

The study focus is still the output and quality as an industrial crop and addictive product for tobacco. Field experiment was conducted to investigate the effects of planting density and amounts of nitrogen application on the yield and quality of tobacco leaves by organic cultivation way at Jinhua town in Fenggang county from2009to2010.The experiment result indicated that (1) different densities and nitrogen applications had no significant effect on the organic tobacco during the growing period.(2) The output value and yield of tobacco leaves with nitrogen application of82.5kg/hm2were the highest. The planting density of18000/hm2for tobacco was able to obtain better growth, high rate of superior leaf, high rate of orange leaf and good coordination of intrinsic chemical compositions.(3) The best overall performance was the treatment with nitrogen application of82.5kg/hm2+planting density of18000/hm2, followed by the treatment with nitrogen application of67.5kg/hm2+planting density of18000/hm2.The demonstration result indicated that (1) the output value and yield of organic leaves was lower than traditional tobacco leaves.(2) The appearance traits such as color, oil etc. of the organic tobacco was better than traditional tobacco leaves;(3) The average price, superior rate of leaves, and the rate of orange leaf of the organic tobacco were evidently higher than traditional tobacco leaves.(4) The content of total sugar and reducing sugar is higher, and the content of total alkaloids and total nitrogen was lower compared to the traditional tobacco leaves. In addition, The contents of the main chemical compositions of the organic tobacco leaves were proper and coordinated.(5) The security of organic leaves was high than traditional tobacco leaves.