攀枝花烟区不同施氮量对云烟85生长和产质量的影响

Effects of Different Nitrogen Rate on Yunyan85's Growth,Yield and Quality in Panzhihua Tobacco Area

在攀枝花烟区选择肥力中等的试验田,研究在磷钾施用量固定的情况下,不同施氮量对烤烟生长和产质量的影响。结果表明:在0～7 kg/667m2范围内增施氮肥能促进烤烟的生长发育,提高产量产值和中上等烟比例,协调化学成分;在7～10 kg/667m2范围内增施氮肥,虽然产量稍有增加,却会导致产值、中上等烟比例和化学品质下降,影响烤烟的工业可用性。综合衡量,在该试验条件下,攀枝花烟区云烟85的最优施氮量为7 kg/667m2。

Medium fertility plots in Panzhihua tobacco area were selected to be the experimental plots.Effects of different nitrogen rates on tobacco＇s growth,yield and quality were studied under the condition of fixed phosphorus and potassium fertilizer.The results showed that when the nitrogen rate increased within in 0-7 kg/667m^2,the growth of flue-cured tobacco was promoted and the production,output and proportion of superior tobacco were increased,also the chemical composition was coordinated.While within the rage of 7-10 kg/667m^2,the increasment of nitrogen reduced the production,output,chemical quality and proportion of superior tobacco,which affect the availability of tobacco industry.In comprehensive measurement,the optimal amount of nitrogen rate of Yunyan 85 in Panzhihua tobacco area was 7 kg/667m^2 under the experimental condition.