Effects of Macro Fertilizers on Performance and Components of Flue-cured Tobacco Coker 347

ABSTRACT: In order to verify effects of nitrogen and potassium fertilizers on wet and dry weights of components of Flue-cured tobacco, an experiment was done in agronomical year 2008 in Rasht City Tobacco Research Institute located in Guilan Province in form of factorial with 8 treatments and 3 iteration. Fertilizing levels used, were including: (N1) 35, (N2) 45, (N3) 55 and (N4) 66 kilograms of net nitrogen per hectare from urea fertilizer source and (K1) 150 and (K2) 200 kilograms potassium per hectare from potassium sulfate (sulfates 2-potash) source. Variety used in this experiment was 326 K. Performance qualities of dry leaf, length of shrub, diameter of stalk and number of leaves in shrub were studied. On the basis of the gained results, effects of fertilizing levels on performance of Flue-cured tobacco in probability level of 1% (p < 0.01) on length of stalk, diameter of stalk and number of leaves in shrub in probability level of 5% (P < 1%) and on diameter of stalk became significant. Potassium became significant on performance of dry leaf, length of stalk and number of leaves in shrub in probability level of 1% (P < 1%) and on diameter of stalk in probability level of 5% (P < 5%) became significant. Also, mutual effects of nitrogen and potassium on performance of dry leaf in probability level of 5% (P < 5%) and on number of leaves in shrub in probability level of 1% (P < 1%) showed a significant effect.