烤烟不同育苗方式的对比试验

为寻求适合贵州烟区烤烟生产实际的育苗新技术,对漂浮育苗、托盘水床育苗和常规育苗3种育苗方式进行了对比试验。结果表明:托盘水床育苗和常规育苗全天苗床温度变化相对较慢,而漂浮育苗系统升、降温迅速。托盘水床育苗的幼苗生长迅速,烟苗株高、叶数合理,茎干粗壮,叶面积较大,烟株根系发达,干物质积累量大;漂浮育苗的烟苗前期生长缓慢而后期生长迅速,成苗素质明显低于托盘水床育苗。托盘水床培育的烟苗光合速率、根系吸收面积明显占优势,根系活力与常规育苗基本一致,但明显高于漂浮育苗。因此,托盘水床育苗技术适宜于贵州烟区应用。

Experiments on Different Seedbed Systems for Flue-cured Tobacco

In order to develope new tobacco seedling breeding methods which are compatible with the practice of flue-cured tobacco production in Guizhou tobacco growing area,three seedbed systems,including floating system,tray-waterbed system and conventional system were compared.The results showed that the temperature changes of tray-waterbed and conventional system were slower than that of floating system;the seedlings in tray-waterbed system grew faster than those in the other two systems,and performed well in plant height,stalk and root development,number and area of leaf,accumulation of dry matter,and etc.The seedlings in floating system grew slowly at early stage and rapidly at late stage,the grown seedlings were obviously not as good as the seedlings grown in tray-(waterbed) system.The photosynthetic rate and absorbing area of root system of seedlings in tray-waterbed system were superior to those of the others.The root vigor of seedling in tray-waterbed system was basically the same as that in conventional system,and obviously higher than that in floating system.It was preferable to popularize tray-waterbed system in Guizhou flue-cured tobacco growing area.