施氮量对烤烟云烟87生长和产质量的影响

Effects of Nitrogen Application Rate on Growth,Yield and Quality of Flue-cured Tobacco Yunyan 87

[目的]探索烤烟品种云烟87的最佳施氮量。[方法]采用随机区组试验设计,设置4个施氮处理(N60、75、90、105 kg/hm2),比较各施氮量下烤烟的生长和产质量表现。[结果]施氮量的增加有利于烟株株高及各部位叶片的生长,产量由2 328.0 kg/hm2增加到3 306.0 kg/hm2,产值由32 058元/hm2增加到45 728元/hm2。但施氮量低于或高于N75 kg/hm2都会降低中上等烟叶的比例,使烤烟均价下降。[结论]从烟叶的可用性和经济效益综合考虑,施氮量以75 kg/hm2最佳。

[Objective] In order to select the best nitrogen application rate for flue-cured tobacco Yunyan 87.[Method]Randomized block design of experimet were adopted,4 kinds of nitrogen application rate with N 60,75,90,105 kg/hm^2 were set up,and the effects of different nitrogen application rates on growth,yield and quality were compared.[Result]Along with the increase of nitrogen application rates,the plant height and maximum leaf area were getting better,yield increased from 2 328.0 kg/hm^2 to 3 303.0 kg/hm^2,and output value increased from 32 058 Yuan/hm^2 to 45 728 Yuan/hm^2.However,if the nitrogen application rate was higher or lower than 75 kg/hm^2,the proportion of high-middle class leaves would be reduced,so that the average price will be declined.[Conclusion] In the view of tobacco availability and economic benefit,the best nitrogen application rate was 75 kg/hm^2.