Effects of Application of Organic Fertilizer Combined with Chemical Fertilizer on Disease Resistance and Quality of Flue-cured Tobacco

CHEN Yuguo; LI Xiaojie; WANG Haitao; LI Shujun?; LI Chengjun; ZHU Jingwei; WANG Liuchen; SONG Pengfei

Abstract：In order to explore the effects of organic fertilizer combined with chemical fertilizer on tobacco growth,disease resistance,quality and provide technical support for reducing coke and harm,the field ex-periment was done to investigate the growth,disease resistance and quality of flue-cured tobacco by app-lying different types of organic fertilizer such as full well-rotted cow dung, sesame-seed cake and soya-bean milk in the condition of the same supply of N,K and different percent of organic-N in total N. The results showed that the full well-rotted cow dung,sesame-seed cake and soya-bean milk under the organic-N amount of 64%,could significantly promote the flue-cured tobacco growth and improve agronomic traits. The resistance of tobacco plant to the virus disease was enhanced,with the disease incidence and index were reduced by 31. 03% and 38. 63% compared with the control(only chemical fertilizer),and its con-trol effect on Alternaria alternata also reached 46 . 91%. The quality and output value of flue-cured toba-cco were increased significantly,and the proportion of upper tobacco leaves,the proportion of upper and middle tobacco leaves, average price and the output value were increased by 31. 84%, 19. 45%, 24. 40%,26. 34% respectively compared with the control. Tobacco of organic fertilizer treatments could obtain high quality leaves containing the suitable ratio of reducing sugar/total sugar,reducing sugar/nico-tine and K2 O/Cl. The sensory evaluation indicated that high flavor quality of leaves which had the characteris-tics of good aroma quantity and full aroma quality could be obtained by the organic fertilizer treatment.