不同烤烟品种生长特性及部分产质量性状差异分析

目的]探讨不同烤烟品种生长特性及部分产质量性状差异，为贵州烤烟生产选用后备品种及品种布局提供理论依据。方法]以‘K326’品种为对照，于2015年在贵州省开阳县冯三镇安坪村开展试验，对不同烤烟品种生长特性差异及产质量性状进行分析。结果]GY8前期生长较快，后期较慢，整个生育期以 GY2和GY5最长，Yun85和Yun87最短；GY2、GY5、GY8株高、最大叶宽、最大叶面积较大， Yun85、Yun87、K326茎围、最大叶长较大；Yun87田间自然发病率较低，其次是 Yun85， GY8较高；GY2、GY5、GY8烟碱、总氮、钾和氯含量较高， Yun85、Yun87、K326总糖、还原糖含量及糖碱比较高；Yun85、Yun87经济性状表现较好，其次是 GY5，GY8经济性状表现较差。结论] Yun85和Yun87品质性状优于 GY2和 GY8，田间自然发病率低于 GY2和 GY8，经济性状表现较好，可以考虑作为未来贵州烤烟生产中的后备品种。

Variance Analysis of Growth Characteristics and Partial Production and Quality Characters of Different Tobacco Varieties

Objective] This study was conducted to discuss growth characteristics and partial production and quality characters of different varieties, so as to provide can-didates for tobacco production as wel as a theoretical basis for variety deployment in Guizhou. Method] ‘K326’ was used as control, the experiment for variance analysis of growth characteristics and partial production and quality characters of dif-ferent tobacco varieties was carried out in Fengsan Town, Kaiyang County, Guizhou Province in 2015. Result] GY8 grew faster in early stages and slower in late stages, the growth periods of GY2 (130 d) and GY5(129 d) were the longest, while those of Yun85 (121 d) and Yun87 (121 d) were the shortest; and GY2, GY5 and GY8 had larger plant heights, maximum leaf widths and maximum leaf areas, and Yun85, Yun87 and K326 showed larger stem girths and maximum leaf lengths. Yun87 exhibited lower natural incidences of diseases, while Yun85 and GY8 showed higher incidences of diseases. GY2, GY5 and GY8 had higher nicotine, total nitro-gen, K and Cl contents, while Yun85, Yun87 and K326 had higher total sugar and reducing sugar contents and higher total sugar/nicotine ratio. Yun85 and Yun87 showed better economic characters, while GY5 and GY8 showed poorer economic characters. Conclusion] Yun85 and Yun87 have quality characters better than GY2 and GY8, field natural incidences of diseases lower than GY2 and GY8, and better economic characters, and thus could serve as candidates in future flue-cured tobac-co production in Guizhou.