海拔高度、施氮量和栽培密度及其交互效应对利川烟区烤烟产质量的影响

Effects of altitude,nitrogen application,planting density and their interaction on yield and quality of flue-cured tobacco in Lichuan tobacco area

通过两年的定位试验研究不同施氮量、栽培密度和海拔高度及其交互效应对利川烟区烤烟烟叶产质量的影响。结果表明,海拔1000~1100 m最适施氮量为97.5 kg/hm^(2),栽培密度为15150~16650株/hm^(2);海拔1100~1200 m,施氮量为97.5 kg/hm^(2)时栽培密度15150株/hm^(2),施氮量为112.5 kg/hm^(2)时栽培密度16650株/hm^(2);海拔1200~1300 m最适施氮量为97.5 kg/hm^(2),栽培密度为16650株/hm^(2)。氮肥对烤烟产质量的影响较大,其次为密度,两者交互效应较小。海拔对烤烟产质量的影响排在施氮量和密度之后,两两之间的交互作用以施氮量与密度最大。总之,利川烟区在海拔1000~1300 m条件下,合适的施氮量和栽培密度分别为97.5 kg/hm^(2)和15150~16650株/hm^(2)。

Two-year field experiment were carried out to study the effects of different nitrogen application,planting density,different altitudes on the yield and quality of flue-cured tobacco leaves in Lichuan tobacco area of Enshi.The results showed that the optimum amount of nitrogen application was 97.5 kg/hm^(2)on 1000~1100 m altitude,and the cultivation density was 15150~16650 plants/hm^(2).On 1100~1200 m altitude,the cultivation density was 15150 plants/hm^(2)with 97.5 kg/hm^(2)nitrogen application,but the cultivation density was 16650 plants/hm^(2)with 112.5 kg/hm^(2)nitrogen application.The optimum amount of nitrogen application was 97.5 kg/hm^(2)on 1200~1300 m altitude,and the cultivation density was 16650 plants/hm^(2).The effect of nitrogen fertilizer on the yield and quality of flue-cured tobacco was the greatest,followed by density,and the interaction between them was smaller.The effect of altitude on the yield and quality of flue-cured tobacco was next to nitrogen application amount and cultivation density.In conclusion,under the condi⁃tion of 1000~1300 m altitude in Lichuan tobacco area of Enshi,the suitable nitrogen application amount and cultivation density were 97.5 kg/hm^(2)and 15150~16650 plants/hm^(2),respectively.