论文部分内容阅读
[目的]探讨NC55在潍坊烟区最优的栽培措施组合。[方法]采用裂区设计,设置施氮量和密度2个因素,研究不同密度和施氮量对烟株长势和产质量的影响。[结果]密度一定时,随施氮量的增加,大田生育期逐渐延长。在相同施氮水平下,烟株茎围和各部位叶面积则随着密度的降低而增加,产量、产值、上等烟比例均呈升高趋势。均价、产值则随施氮量的增加先升高后降低。[结论]该试验最优组合为中等施氮量90.0 kg/hm~2、密度1.20 m×0.45 m。
[Objective] The aim was to discuss the best combination of cultivation measures of NC55 in Weifang tobacco area. [Method] With split zone design, setting nitrogen rate and density, the effects of different densities and nitrogen application rates on plant growth and yield and quality were studied. [Result] With certain density, with the increase of nitrogen application rate, the growth period of field was gradually extended. Under the same N level, leaf area around the stem and leaf area of all tobacco plants increased with the decrease of density, and the yield, the output value and the proportion of top tobacco increased. The average price, output value increased with the increase of nitrogen rate first increased and then decreased. [Conclusion] The optimum combination of this experiment was medium nitrogen application rate of 90.0 kg / hm ~ 2 and density of 1.20 m × 0.45 m.