不同形态氮素配比对地膜烟的生长及烟叶品质和产量影响

 研究云南旱地烤烟生产在采用地膜栽培技术条件下,NH₄⁺-N和NO₃^--N不同配比对烟株生长及烟叶品质和产量的影响。研究结果表明:100%的NH₄⁺-N或NO₃^--N都对烟株生长及烟叶的品质均产生不利影响;烟叶的产量及上等烟比例有随 NH₄⁺-N比例增加而提高的趋势。在一定范围内烟叶中总糖、烟碱、K的含量随NH₄⁺-N比例的增加而升高,总N含量则呈下降趋势。因此,在烟草生产中施用的N肥应注意到两种形态N肥的合理配合,不应只片面强调某一种N素形态的肥料施用。

Study on the Influence of Different Percentage of NH_4~ -N and NO_3~--N on the Quality and the Yield of Tobacco Grown in Dry-land Field with the Covering of Plastic Film

The experiment was conducted under the condition of dry land area in Yunnan and the field being covered with plastic film to study the influence of different percentage of NH 4 N and NO 3 N on the growth of tobacco, the quality and the yield of tobacco leaf. The study results showed that 100% of NH 4 N or NO 3 N both had negative influence on the growth of tobacco plant and the quality of tobacco leaf; the yield and the ratio of better grade leaves appeared went up as the percentage of NH 4 N increased, in certain range the total sugar, the nicotine and the K content in the leaves were up as the percentage of NH 4 N increased, while the total N content showed the tendency of decrease.