Effect of different organic nitrogen rates on the growth, yield and quality of flue-cured tobacco

In order to study the effects of different organic nitrogen rates on yield and quality of flue-cured tobacco,field experiment combined with laboratory analysis was employed in this study,tests was carried out under the same conditions NPK total nutrient dosage.The results showed that:(1) Organic fertilizer could increase the flue-cured tobacco plant height,leaf length,leaf width and leaf area,the effective number of leaves,could effectively promote the growth and development of flue-cured tobacco.(2) Organic fertilizer could increase the sugar content of the flue-cured tobacco,reduce the upper and the middle leaf nitrogen content,improve the quality of tobacco,organic fertilizer could make its chemical composition tend to be more coordination,more consistent the requirements of high quality tobacco.(3) Organic fertilizer could improve the ratio of upper-tobacco leaves and middle-tobacco leaves,improve tobacco yield and value,the yield was increased by 4%～13%,the value was increased 1 153.04～5 101.76 yuan/hm2.(4) In the three treatment,the 20% treatment was the best in all treatments.