品种与施肥量对烤烟生长发育及产质量的影响

Effects of Variety and Fertilization Amount on Flue-Cured Tobacco

品种与施肥量对烤烟的生长发育及产质量都有很大影响。株高、节距和单株有效叶数受品种的影响较大 ;茎围、单株叶面积、叶面积指数 (LAI)、平均单叶重和产量受施肥量的影响较大 ;叶片大小、上等烟比例、均价及产值则受品种和施肥量的影响较大。施肥量增大 ,烟株生长发育加快 ,产量增加 ,但品质下降 ;3个品种的生长发育各有优势 ,产量相近 ,品质则G2 8的较差。南昌地区以K32 6和G80在中等施肥 (N 1 5 0kg/hm2 ,N∶P2 O5∶K2 O为 1∶1∶2 .5 )条件下产量较高、品质好。

Variety and fertilization amount had great effects on the growth, yield and quality of flue-cured tobacco. The plant height, internode length and the effective leaves per plant were mainly affected by variety. The stem diameter, leaf areas per plant, leaf area index (LAI), single leaf weight in average and the yield were mainly affected by fertilization amount. The leaf size, percentage of high-grade cured leaves, average price and the output value were affected by both variety and fertilization amount. Along with the rise of fertilization amount, the growth and development of tobacco plant quickened, the yield increased, but the quality decreased. Three varieties had their own advantages respectively in their growth and development, their yield were similar, but the quality of G28 was not as good as those of K326 and G80. the varieties of K326 and G80 were of higher yield, fine quality and higher output value under middle fertilization amount (N150kg/hm 2,N∶P 2O 5∶K 2O was 1∶1∶2.5) in Nanchang region.