施氮量对烤烟云烟87生长和产质量的影响

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/hm^2）,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/hm^2增加到3 306.0 kg/hm^2,产值由32 058元/hm^2增加到45 728元/hm^2。但施氮量低于或高于N75 kg/hm^2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/hm^2最佳。

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

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/hm2 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/hm2 to 3 303.0 kg/hm2,and output value increased from 32 058 Yuan/hm2 to 45 728 Yuan/hm2.However,if the nitrogen application rate was higher or lower than 75 kg/hm2,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/hm2.