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在有机质含量高达 5 8.2g/kg的土壤上进行烤烟施肥量比的田间试验结果表明 ,不同氮磷钾肥量比明显影响烟株长势 ,肥料用量与株高、茎围、有效叶片数和叶面积系数间呈极显著的二次曲线关系 ,而与节距和展开度呈直线型变化。施肥量比对烤烟叶片厚度、光泽、颜色、油润度等外观品质有明显影响 ,以增施钾肥提高烟叶商品性的作用最大。烤烟经济产量和产值均以N∶P2 O5∶K2 O =1∶1∶3处理为最高 ,较对照净增产值 35 6 3.5元 /hm2 ,为其它施肥处理的2 .1 2～ 2 9.1倍
The results of field experiments on the ratio of flue-cured tobacco fertilization on soils containing up to 5 8.2 g / kg of organic matter showed that the ratio of N, P and K significantly affected the growth of tobacco plants, the amount of fertilizer and plant height, stem circumference, effective leaves and leaf area The coefficients show a very significant conic relationship, but a linear change from pitch and spread. Fertilizer ratio on tobacco leaf thickness, luster, color, oiliness and other appearance quality has a significant impact, in order to increase the potassium fertilizer to promote the commercialization of tobacco most. The economic yield and output value of flue-cured tobacco were the highest with N: P2 O5: K2 O = 1: 1: 3, 35.6 3.5 Yuan / hm2 more than that of the control, and 2.1-1.2 ~ 2 9.1 times of other fertilization treatments