不同施氮量及基追比对烤烟产质量的影响

[目的]探讨不同施氮量及基追比对烤烟产质量的影响,明确寻甸烟区适宜的施氮量和基追比。[方法]以烤烟品种K326为材料,通过大田试验,研究不同施氮量及基追比对其生育期、主要农艺性状、主要病害、外观质量和产质量的影响。[结果]综合比较各处理及对照,处理(3)(常规减氮20%以及基追比40%∶60%)时,烟株在农艺性状、产量、产值和中上等烟比例等指标方面均优于其他处理。[结论]合理的基追比有利于烟株生长,在寻甸烟区范围内建议施用氮肥102 kg/hm~2,氮肥基追比40%∶60%。

Effects of Nitrogen Fertilizer Rate and Ratio of Base to Topdressing on Yield and Quality of Flue-cured Tobacco

[Objective] To study the effects of nitrogen fertilizer rate and ratio of base to topdressing on yield and quality of flue-cured tobacco,to ascertain the appropriate nitrogen fertilizer rate and rate of base to topdressing for Xundian tobacco area.[Method] Based on the variety K326,the experiment was carried out to study the effects of nitrogen fertilizer rate and ratio of base to topdressing on growth period,major agronomic characters,diseases,appearance quality and yield of flue-cured tobacco.[Result] Comparing the treatments and comparison,the agronomic characters,yield,output value and the ratio of high-middle quality tobacco of treatment ③[nitrogen reduction 20% and ratio of base to topdressing (40%:60%)] were superior to other treatments.[Conclusion] Reasonable ratio of base to topdressing could promote the growth of tobacco plant.Its recommended that applying nitrogen fertilizer 102 kg/hm2 and ratio of base to topdressing was 40%:60% in Xundian area.