تأثیر سطوح مختلف کودی نیتروژن برای تولید تنباکوی اصفهانی در منطقه اصفهان

Adequate supply of plant nutrients with accurate use of fertilizers, especially in poor soils will increase the yield. Scientists believe nitrogen is a major component of many organic compounds such as proteins, nucleic acids and nicotine. This investigation was performed in order to study the effect of different levels of nitrogen fertilizer to increase the quality and quantity of tombac (var: Esfahan). This study was performed RCBD with 8 treatments (0, 46, 92, 138, 184, 230, 276 and 322 kg nitrogen/ha) and 3 replications near Esfahan tombac research station in 2012. During the growing season leaf width and length (cm), stem diameter (mm), leaf chlorophyll (spot) factors and after harvesting (stalk cut) dry yield (kg/ha), average price (rials), gross income in hectare (rials), and the content of sugar, nicotine, N and K in dry leaf were determined. The results of variance analysis showed that the effect of different nitrogen fertilizer levels on dry yield and gross income characteristics were significant in %1 and %5 levels, respectively. The results of mean comparison showed that 230 kg nitrogen/ha (500 kg Urea fertilizer) treatment with the highest amount of gross income is introduced as superior treatment.