烤煙濕潤育苗技術(shù)研究
echniques of Flue-cured Tobacco Seedling Production on Moist Trays
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摘要: 對以育苗基質(zhì)和營養(yǎng)液配方的篩選、肥水管理方式的改進和不同育苗方式比較為主要內(nèi)容的烤煙濕潤育苗技術(shù)進行了探討,。結(jié)果表明,，10號育苗基質(zhì)配方和2號營養(yǎng)液配方所育煙苗綜合素質(zhì)最高，莖高,、莖圍適中,，根系發(fā)達，根系活力強,，根莖葉干鮮重最重,；育苗肥水管理方式由傳統(tǒng)的“一段式”改為“前期淺灌、后期澆施”的“二段式”,，不僅大大降低了煙農(nóng)的育苗用工，而且解決了肥水單純采用澆施,，導致基質(zhì)易板結(jié),、出苗率較低、生長不整齊等問題,；與漂浮育苗相比,，該技術(shù)不僅保持了漂浮育苗的優(yōu)勢，同時提高了成苗期煙苗的素質(zhì),，有效地解決了返苗期偏長的問題,。Abstract: he techniques of flue-cured tobacco seedling bed on moist trays were studied. The main contents of the techniques were the selection of mediumsand 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, goodroot 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 laborcost 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 dispositionof tobacco transplants, shortened the resuscitation period after transplanting, and improved the quality of the middle and lower leaves.
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