Effects of “3414” Fertilizer on Flue-cured Tobacco

[Objective] The research aimed to provide the theoretical basis for soil testing and formula fertilization of different tobacco-growing areas.[Method] Based on 3414 fertilizer experiment design,the effects of different fertilizer on flue-cured tobacco growth,yield and quality were studied.[Result]The growth condition in field of different treatment tobacco plants had large difference.The content of total nitrogen,total nicotine and K2O in flue-cured tobacco had a closed relationship with different fertilizer effect.The different fertilizer effects had a large impact on economic characters of flue-cured tobacco.The flue-cured tobacco yield by the treatment of no fertilizer was lowest,and the ratio of mid-high grade leaves of flued-tobacco was higher.The economic characters of flue-cured tobacco by the treament of most N fertizer application rate didn't show the best manifestation.[Conclusion] The simulated three-factor equation of fertilizer effect was eatablished: Y=138.36+23.18X1-0.83X12-4.32X2+0.34X22-4.40X3+0.09X32-1.02X1X2-0.35X1X3+0.64X2X3(X1,X2,X3 represent the level of N,P2O5 and K2O fertilizer respectively).The research could guide local tobacco production by forecasting maximum fertilization rates and optimum fertilization rates.