种植密度与钾肥用量及其互作对烤烟经济性状的影响

Effect of Planting Density and Potassium Fertilizer Dosage and Their Interaction on Economic Characteristics of Flue-cured Tobacco

为寻求黔北山地烤烟优质高产栽培密度与施钾量的最佳组合,采用以种植密度为主区、钾肥施用量为副区的双因素裂区试验,结合经济效果指数法和偏(Eta)2值分析法,研究烤烟种植密度和钾肥施用量及其互作效应对烤烟经济性状的影响。结果表明,随种植密度的增加,烤烟产量极显著增加,产值、均价先升后降;18 000株·hm-2(X2)的综合经济性状最好,16 500株·hm-2(X1)次之,19 500株·hm-2(X3)最差。增加钾肥施用量能显著或极显著提高烤烟产值、均价及中上等烟比例,但对烤烟产量影响不大;Y3处理的综合经济性状最好,Y2次之,Y1最差。种植密度与钾肥互作的综合经济性状以X2Y3最好,X2Y2组合次之。由种植密度、钾肥施用量及其互作的偏(Eta)2值得出,种植密度对烤烟产量、产值、均价及上中等烟比例具有高度影响;钾肥施用量对产量影响不大,对产值和上中等烟比例具有高度影响;种植密度与钾肥互作对烤烟经济性状各项指标影响度均较低;X2Y3组合的经济性状最好。

To find the best combination of high-quality and high-yielding cultivation density and potassium application dosage of flue-cured tobacco in northern Guizhou province, two-factor split plot design by planting density for the main area and potassium fertilizer dosage for the deputy area was conducted, at the same time combined with economic character index(ECI) and partial(Eta)2 value analysis to study the effect of planting density and potassium fertilizer dosage and their interaction on economic characteristics of flue-cured tobacco. The results showed that with the increase of planting density, the yield of flue-cured tobacco increased significantly, and the output value and average price increased first and then decreased. The characteristics was the best in planting density of X2, and that of X1 was better,and that of X3 was the worst. Potash fertilizer dosage had little effect on the yield of flue-cured tobacco, which promoted the yield value of flue-cured tobacco, the average price, the proportion of fine and middle tobacco leaves. The characteristics was the best in the treatment of Y3, and that of Y2 was better, and that of Y1 was the worst. The characteristics was the best in the interaction of planting density of X2 Y3 and that of planting density of X2 Y2 was better. Partial(Eta)2 of planting density, potash fertilizer dosage and their interaction as follows :the planting density had a high impact on the yield, output value, average price and the proportion of fine and middle tobacco leaves. Potash fertilizer dosage had little effect on yield, and had a high impact on output value and the proportion of fine and middle tobacco leaves. Interaction of planting density and potash fertilizer dosage had little effect on the economic characteristics of flue-cured tobacco, and the characteristics was the best of X2 Y3.