铵态氮与硝态氮不同配比对烟叶产量和质量的影响

研究了铵态氮与硝态氮不同配比对烤烟产量、质量的影响,结果表明:在等氮量的条件下,单施铵态氮的烟株长势强,叶片过厚、落黄慢;而单施硝态氮的烟株对氮素养分的吸收快、生长速度也快,但氮素易流失,烟株较矮小,叶片较小且落黄快;适宜比例的铵态氮与硝态氮配合施用,烟株前期早生快发,后期营养充足,上部叶充分展开、落黄均匀、分层明显,烘烤性能提高,能保证一定的产量和质量。

Effects of different proportions of ammonium nitrogen and nitric nitrogen on the yield and quality of the tobacco

Research for the effect on the yield and quality of tobacco by using different proportion of ammonium nitrogen and nitric nitrogen shows that:in the same nitrogen amount,if only fertilizing ammonium nitrogen,tobacco grows better,the leaf is too thick and become yellow slowly,and if just fertilizing nitric nitrogen,tobacco absorbs and grows too fast,nitric nitrogen is easy to lose.and tobacco is shorter and smaller,leaf is relatively small,become yellow fast.So if use proper proportion between them,the tobacco will grow fast in earlier stage,nutrition is sufficient in later stage,the top leaf is fully spreaded,and it is even to become yellow,evidently bed,toast performance to improve,which can promise yield,quality.