不同磷肥施用量对烤烟产量及品质的影响

Effect of Different Phosphate Fertilizer Application Rate on Yield and Quality of Tobacco

[目的]研究不同磷肥施用量对烤烟产量及品质的影响。[方法]通过田间试验研究不同的磷肥施用量对烤烟生长及烟叶产量和品质的影响。[结果]不同磷肥施用量,对烤烟的生育期和前期长势影响不大,但后期长势较好;随着磷肥施用量的增加,烤烟株高逐渐增加,有效叶片数也逐渐增多,中、上部烟叶随着磷肥施用量增加,其叶长相应增加;随着磷肥施用量的增加,产量呈逐渐增加趋势,当磷肥施用量为157.5 kg/hm2时,产值最高,达39 235.80元/hm2,上等烟所占比例也最高,达45.61%,当磷肥施用量为315.0 kg/hm2时,产量最高,但烤烟质量下降。[结论]当磷肥施用量为157.5 kg/hm2时,效果最好,磷肥施用量过高,会使烤烟品质下降。

[ objective ] The study was to research the effect different phosphate fertilizer application rate on yield and quality of tobacco. [ Method ] Growth,yield and quality of tobacco under different phosphate fertilizer levels were studied through field experiment. [ Resu!ts ] The results showed that different phosphate fertilizer levels had no effects on growth stage and early growth, but the growth enhanced in vigorous growth stage. The plant height and number of effective leaves were increased, and the length of leaves on the middle and upper part were in- creased with the increase of phosphate fertilizer application rate, at the same time, the yield was also increased, when phosphate fertilizer was 157.5 kg/hm^2 , the output value was maximum, reached to 39 235.80 yuan/hm^2 , and the percentage of high class leaf was higher, reached to 45.61%. When phosphate fertilizer was 315.0 kg/hm^2 , the yield was highest, but the quality was decreased. [ Conclusion ] The effect was best when phosphate fertilizer application rate was 157.5 kg/hm^2. Meanwhile, the application rate was higher, the quality of tobacco was decreased.