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N,P,K是烟草生长的重要营养元素,其对产质量及效益的影响作用大小不同,本研究结果表明,产量随施N量的增加而增加,随K的增加呈下降趋势,3要素对产量的影响作用N>K>P;上中等烟比例随施P量增加呈下降趋势,施N以360kg/hm2为高,施K以N∶K为1∶2的高,其影响作用P>K>N;均价随施P量增加有下降趋势,施N以360kg/hm2为高,施K以N∶K为1∶2的最高;内外在品质以处理组合4最好。从优质、高效、低成本考虑,综合试验结果,以施N300kg/hm2,P2O5150～300kg/hm2,K2O600kg/hm2,N∶P2O5∶K2O=1∶0.5～1∶2为最优组合。
N, P, K are important nutrition elements of tobacco growth, which have different effects on production quality and benefit. The results of this study show that the yield increases with the increase of N application rate, and decreases with the increase of K content. The effect of N> K> P on the yield was high. The proportion of upper middle-level tobacco decreased with the increasing of P application. N was 360kg / hm2 and N: K was 1: 2. The effect of P > K> N. The average price decreased with the increase of P application. N was 360kg / hm2, K was highest, N: K was 1: 2, and the combination of internal and external quality was the best. Considering the advantages of high quality, high efficiency and low cost, the optimal combination of N300kg / hm2, P2O5150 ~ 300kg / hm2, K2O600kg / hm2, N: P2O5:K2O = 1: 0.5 ~ 1: