Effect of Main Agricultural Practices on Productivity and Quality of New Tobacco Variety Burley 420
R. Bozhinova, M. Mutafchieva
Резюме: The effects of different nitrogen rates (70, 100 and 130 kg N ha-1) and time of topping on productivity and leaf quality of new tobacco variety Burley 420 have been studied in field experiment set on Cleyic-Chromic Luvisol.
Nitrogen fertilization was found to be important factor for increasing the productivity of tobacco. Time of topping has a much greater effect on the quality of tobacco (as determined by the percentage of first grade dried tobacco).
Chemical composition of the cured tobacco changed as dependent on the nitrogen fertilization rate and the time of topping. Nicotine content increased with the increase of nitrogen rate. Nitrogen fertilization had no effect on reducing sugars content. Earlier topping produced a higher concentration of nicotine and total nitrogen in the leaves than later removal of the inflorescences. Leaf protein content was not affected by N fertilizing level and time of topping.
Nitrogen fertilization was found to be important factor for increasing the productivity of tobacco. Time of topping has a much greater effect on the quality of tobacco (as determined by the percentage of first grade dried tobacco).
Chemical composition of the cured tobacco changed as dependent on the nitrogen fertilization rate and the time of topping. Nicotine content increased with the increase of nitrogen rate. Nitrogen fertilization had no effect on reducing sugars content. Earlier topping produced a higher concentration of nicotine and total nitrogen in the leaves than later removal of the inflorescences. Leaf protein content was not affected by N fertilizing level and time of topping.
Ключови думи: Burley tobacco; nitrogen fertilization; topping
Дата на публикуване: 2017-02-13
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