播种期对湘南烟区烟叶产质量的影响

为探索衡阳烟区不同播种期对烤烟产质量的影响,采用4个播种期处理,考察烟苗素质和大田期烟株的生长发育特性,以及烟叶烘烤后产质量特性。结果表明,12月15日播种的烟苗生育期适宜,烟苗成活率达94%,烟苗健壮；移栽揭膜后40 d能够保留13片有效叶片,株高和茎围分别达到88 cm和8.8 cm ,叶面积显著大于其他处理；烤后烟叶外观质量颜色橘黄程度高,成熟度好,综合得分均明显优于其余处理,说明适当推迟播种期能够显著提高烟苗素质,增加产值,改善烤后烟叶质量。

Effect of Different Sowing Date on Tobacco Yield and Quality in Southern Hunan Province

For exploring the effect of flue-cured tobacco yield and quality on different seeding time, the paper use 4 dif-ferent seeding time to examine the quality of seedling, the index of tobacco growth and development during the field period （ from transplanting to budding） , and the index of flue-cured tobacco yield ＆ quality. The result was shows as follows：comparing with other treatment, the growth period of tobacco seedling which sowed on 15th December was suitable, and the surviving rate of seedling was 94%. There were 13 effective leaves on 40th day after transplanting, the height of plant and stem diameter was 88 cm and 8. 8 cm, respectively. There was significant difference between T2 and other treatment;the color of leaf by roasting was orange, good maturity, there was higher synthesis score in the T2 than other treatment. Therefore, to appropriate delay the seeding time can significantly improve the quality of tobacco seedlings, increase out-put, and improve the quality of tobacco leaf by roasting.