Effects of Bio-organic Fertilizer on Accumulation, Uptake and Contents of N, P, K in Flue-cured Tobacco

A field experiment was conducted to study the effect bio-organic fertilizer application on accumulation,uptake and contents of N,P and K in flue-cured tobacco.The results showed that application of bio-organic fertilizer could improve the accumulation of N,P,K in tobacco plants.The accumulation in flue-cured tobacco plant,from high to low,was T3(75% bio-organic fertilizer) T2(50%) T1(25%) CK(0%) for N,and T2T1T3CK for K.For accumulation in separate plants,it was 5.29,4.84,4.20,3.55 g for N,and 4.92,4.59,4.58,3.92 g for K,respectively.In 50 days after transplantation,regarding uptake rate,it was definitely improved for N in all treatments of bio-organic fertilizer application,and for P it was improved in treatment of 50% but decreased in treatment of 75% bio-organic fertilizer application.For K,it gradually increased in rosette stage and reached peak around 50 days after transplantation.It is concluded that application of bio-organic fertilizer can improve the contents of N,P and K in tobacco plants of active growth stage,enhancing the growth and development of flue-cured tobacco in fields,and resulting in increased potassium contents of cured tobacco leaves.