烤烟湿润育苗技术研究

对以育苗基质和营养液配方的筛选、肥水管理方式的改进和不同育苗方式比较为主要内容的烤烟湿润育苗技术进行了探讨。结果表明,10号育苗基质配方和2号营养液配方所育烟苗综合素质最高,茎高、茎围适中,根系发达,根系活力强,根茎叶干鲜重最重;育苗肥水管理方式由传统的"一段式"改为"前期浅灌、后期浇施"的"二段式",不仅大大降低了烟农的育苗用工,而且解决了肥水单纯采用浇施,导致基质易板结、出苗率较低、生长不整齐等问题;与漂浮育苗相比,该技术不仅保持了漂浮育苗的优势,同时提高了成苗期烟苗的素质,有效地解决了返苗期偏长的问题。

Techniques of Flue-cured Tobacco Seedling Production on Moist Trays

The techniques of flue-cured tobacco seedling bed on moist trays were studied.The main contents of the techniques were the selection of mediums and nutrient solutions and the improvements of management of fertilizer and irrigation and the comparative experiments on different seedling production mode.The results showed that the NO.10 medium with NO.2 nutrient solution produced the best seedlings with desirable height and width,well developed roots,good root activity and the most fresh and dry weight of the roots,stems and leaves.Management of fertilizer and irrigation was changed from the traditional"one section approach"to"two section approach"of"floating earlier and irrigation later".The new approach could significantly decrease the labor cost and resolve the problems such as harden medium,lower germination rate and lower uniformity of flue-cured tobacco seedlings as in traditional approach.The techniques of seedling production on moist trays not only remained the dominance of seedling nursing on float system,but also increased the disposition of tobacco transplants,shortened the resuscitation period after transplanting,and improved the quality of the middle and lower leaves.