| Taking flue-cured tobacco G80 as material, the pot experiment was carried out to study the effects of different amounts of nitrogen and calcium on agronomic characters and dry weight of flue-cured tobacco. The results showed that with the increase of nitrogen fertilizer from 0.12 g/kg to 0.20 g/kg, the changes of agronomic characters of flue-cured tobacco after transplanting 35 d were not obvious except for stem girth, which increased remarkably, the agronomic characters of flue-cured tobacco’s after transplanting 80 d and all parts of dry weight during mature period increased remarkably or significantly except for the maximum leaf width, whose difference was not significant. As the amount of calcium fertilizer increased, agronomic characters and all parts of dry weight of flue-cured tobacco increased first and decreased later, the agronomic characters of flue-cured tobacco of 0.40 g/kg Ca treatment after transplanting 35 d were better, and the agronomic characters of flue-cured tobacco after transplanting 80 d and all parts of dry weight of 0.40-1.00 g/kg Ca treatment were better. When the N supply was 0.12 g/kg, the agronomic characters of flue-cured tobacco after transplanting 35 d and 80 d and all parts of dry weight of 1.00 g/kg Ca treatment were better; supplied with 0.20 g/kg N fertilizer, the agronomic characters of flue-cured tobacco after transplanting 35 d and 80 d and all parts of dry weight of
0.40 g/kg Ca treatment were better. 1.00 g/kg Ca applied with 0.12 g/kg N, 0.40 g/kg Ca supplied with 0.20 g/kg N could effectively improve the agronomic characters, increase dry weight of each part, promote the growth and improve the yield of flue-cured tobacco. |
