不同种植密度对烤烟生长及产质量的影响

Effects of Different Planting Densities on Growth, Yield and Quality of Flue-cured Tobacco

为了探索奉节太和烟区的最佳种植密度,2015年设置了不同植烟密度对比试验,研究了不同密度处理与烟株农艺性状、病害发生、产量和质量的关系。结果表明,低密度处理(1.50万~1.65万株·hm^(-2))具有促进烟株茎围变粗、增加烟株叶片数、增加烟叶面积的作用,尤其是打顶期较为明显;在病害发生上,低密度处理对烟草野火病、赤星病、炭疽病具有一定的抑制作用,病情指数普遍小于高密度处理;低密度处理对烟草普通花叶病毒病、气候斑点病抑制作用不明显。在烟叶产值、产量上,低密度处理产值产量较适合。

To explore the best planting density of Fengjie-Taihe tobacco growing areas, different tobacco planting density contrast test was setted in 2015 to study the relationship between the different density treatments and tobacco plant agronomic traits, disease inci- dence, yield and quality. The results showed that the low density treatment （15 000-16 500 plants, hm-2） could promote tobacco stem thicker, increase the number of tobacco plant leaves, increased leaf area, especially the topping period was more obvious. In the oc- currence of disease, low density treatment had certain inhibitory effect on tobacco wildfire disease, alternaria alternata, anthracnose, disease index was generally less than that of high density, low density treatment was no significant inhibitory effect on tobacco mosaic vinls, wenther fleck. In the output of tobacco leaf production, the output of the low density treatment was more suitable.