氮钾追肥不同施用量对烤烟生长性状的影响

Effects of Different Dosages of Nitrogen-Potassium Topdressing on Growth Traits of Flue-cured Tobacco

[目的]明确氮钾追肥不同施用量对烤烟生长性状的影响。[方法]在施纯氮120 kg/hm2,N∶P2O5∶K2O为1∶1∶2的同等施氮水平下,采用追肥量单因素随机区组设计,设追施KNO3150(CK)kg/hm2和氮钾追肥120、225、300 kg/hm2共4个处理,研究氮钾追肥施用量对烤烟大田生育期、农艺性状、经济性状和内在品质影响。[结果]各处理的大田生育期基本相同,施氮钾追肥300 kg/hm2的农艺性状表现最优;施KNO3追肥150 kg/hm2的在产量、产值、均价方面均表现最好,施氮钾追肥225 kg/hm2的处理内在化学成分更适宜和协调,经济性状和农艺性状表现较好。[结论]氮钾追肥以225 kg/hm2较好,具有较好的应用价值。

[ Objective ] The aim was to ascertain the effects of different dosages of nitrogen-potassium topdressing on the growth, yield and quality of flue-cured tobacco. [ Method ] Under 120 kg/hm^2 nitrogen application with N：P2 O5：K20 = 1：1：2 , the effects of 4 treatments （KNO3 150 kg/hm^2 （CK） , nitrogen-potassium topdressing 120,225 and 300 kg/hm^2） on the growth, agronomy, yield and quality of Yunyan 85 were studied with single factor and randomized block design. [ Result] The field growth period of each treatment was almost similar. The agronomic characters of the treatment of nitrogen-potassium topdressing 300 kg/hm^2 was the best. The yield, the production value, the average price were the optimum in the treatment of KNO3 topdressing 150 kg/hm^2. The chemical composition of the treatment of nitrogen-potassium topdressing 225 kg/hm^2 were more suitable and harmonious, with better economic and agronomic characters. [ Conclusion] The dosage of nitrogen-potassium topdressing 225 kg/hm^2 were relatively better, nitrogen-potassium topdressing had better application value.