雪茄茄衣CX-26品种氮磷钾肥效果及推荐用量研究

为探明雪茄烟适宜氮磷钾施肥量，设计雪茄烟专用肥，采用田间“3414”试验，研究不同氮磷钾肥料处理对雪茄烟产量、分级产量和养分吸收利用的影响。结果表明：（1）与不施肥处理相比，各施肥处理显著提高雪茄烟叶的产量，增产效果：氮肥＞钾肥＞磷肥。（2）氮磷钾肥料的施用均可以优化烟叶等级结构，增加茄衣和茄套的产量，提高产值。（3）N、P2O5、K2O积累量得到增加，氮磷钾最大肥料利用率分别达到38.75%、14.89%和25.20%。（4）一元二次回归拟合发现，烟叶最大产量时的施氮量为138.75 kg/hm2，施磷量为71.85 kg/hm2，施钾量为361.65 kg/hm2。显然，氮磷钾的合理施用可以提高雪茄烟叶的产量，改善雪茄烟叶的质量。

Study on the Effects and Recommended Dosage of Nitrogen, Phosphorus and Potassium Fertilizer for Cigar Wrapper

In order to find out the suitable amount of nitrogen, phosphorus and potassium fertilizer for cigar, a special fertilizer for cigar was designed. The field "3414" experiment was conducted to study the effects of different nitrogen, phosphorus and potassium fertilizer treatments on Cigar yield, grading yield and nutrient absorption and utilization. The results showed that: (1) Compared with no fertilization treatment, each fertilization treatment significantly increased the yield of cigar tobacco, and the yield increasing effect was: nitrogen fertilizer > potassium fertilizer > phosphorus fertilizer. (2) The application of nitrogen, phosphorus and potassium fertilizers can optimize the grade structure of tobacco leaves, increase the yield of eggplant jackets and jackets, and increase the output value. (3) The accumulation of N, P2O5 and K2O increased, and the maximum fertilizer utilization rates of N, P and K reached 38.75%, 14.89% and 25.20% respectively. (4) Univariate quadratic regression fitting showed that the maximum yield of tobacco leaf was 138.75 kg/ha of nitrogen, 71.85 kg/ha of phosphorus and 361.65 kg/ha of potassium. Obviously, the rational application of nitrogen, phosphorus and potassium can increase the yield of cigar tobacco leaves and improve the quality of cigar tobacco leaves.