Study the Effect of Different Nitrogen Resources on Quality and Quantity of Tobacco in Two Locations

Document Type : Research Paper

Abstract

Abstract:
Background: Nitrate (NO3-) and ammonium ion (NH4+) in the soil differ for their effects on yield quantity and quality of tobacco. Climatic and edaphic factors and agronomic management can undermine their differences. With the increase in leaf yield, chlorine and nicotine content of the leaves and on the contrary, by reducing potassium content, nitrogen, has the opposite effect on the quantity and quality of tobacco leaves. Tobacco farms do not consume urea fertilizer in the country and farmers believe that the use of urea result to the late tobacco and tobacco leaf color is inappropriate technology.
Material and method: Two field experiments were conducted in Oromieh and Titrtash in 2014 to study the interactive effects of nitrogen resources) urea (ammonium) and nitrate ammonium fertilizers (and application pattern on yield quantity and quality of tobacco. The treatments were factorial arrangement of nitrogen resources and application patterns of basal, 2/3 basal and 1/3 after initiation of rapid growth (AIRG, about three days after transplanting), 1/2 basal and 1/2 AIRG, 1/3 basal and 2/3 AIRG) with 3 replications based on randomized complete block design. Dry leaf yield, gross revenue, average price of tobacco, chlorophyll, nicotine, sugar, ash, chlorine, potassium, plant height and leaf area index were measured. Analysis of variance was performed using SPSS software.
Finding: The results indicated that the leaf yield was higher in Tirtash than Oromieh. In terms of leaf yield, the best application pattern for urea and nitrate ammonium was 2/3 basal and 1/3 AIRG, and 1/3 basal and 2/3 AIRG, respectively. Regarding potassium content of cured leaf, urea was better than nitrate ammonium for Tirtash. But for Oromieh, it was vice versa. Nicotine content was only affected by application pattern; the 1/2 basal and 1/2 AIRG was the best for nicotine content. Ammonium nitrate caused lower accumulation of chloride in leaf than urea. Generally, although urea and nitrate ammonium did not differ for leaf yield, but they can enhance leaf quality (potassium content) in Tirtash and Oromieh, respectively.
Conclusion: As a conclusion it can be said that the effect of nitrogen source on leaf yield was not significant. In other words, no difference between urea and ammonium nitrate in terms of leaf yield.The results dispel the ambiguities use of urea fertilizer in the tobacco field and given the relative abundance of urea relative to ammonium nitrate fertilizer domestic production of these fertilizers, the problems facing tobacco farmers in different regions in the preparation of ammonium nitrate fertilizer eliminated.

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References

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Journal of Crop Production
Volume 10, Issue 3
January 2018
Pages 133-142

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