engleski

The influence of different amounts of nitrogen on the yield and quality of Virginia tobacco

Two year research has carried out at the experimetal field of the Tobacco Institute Zagreb in Pitomača. The trial was set up on luvisol ; typical for the tobacco growing area in Croatia. The trial was set up according to the block method with four replications. Rates of 0, 20, 30, 40 and 50 kg N ha-1 were applied in fertilization. In both years, as the rate of nitrogen increased from 40 to 50 kg N ha-1 average yield and lenght and wide of middle leaf also increased, but usualy estimated quality of cured leaf decreased. At the same time, with the increased fertilization (> 40 kg N ha-1) the content of reducing sugars decreased.

flue-cured tobacco; nitrogen fertilization; yield; quality; nicotine; reducing sugars

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