不同起垄方式及覆膜对烤烟生长发育和产质的影响

运用前期氮素调控措施(提前起高垄和覆膜)对烤烟生长发育和产质的影响进行了试验。结果表明,采用高茎壮苗提前起高垄覆膜深栽,土壤有机氮提前矿化和释放,烟株提前形成较多的根系,烤烟提前吸收养分,能提前实现早生快发,提高烟叶产量;在烤烟生长后期,植烟土壤氮素供应的减少及烤烟根系活力的减弱,避免烤烟后期生长过旺,降低了上部烟叶的烟碱含量。

Effects of Different Ridge and Cover Patterns on Growth, Development, Yield and Quality of Tobacco

Yunyan 87,a popularized tobacco variety,was tested under different ridge and cover patterns to investigate the effects on its growth,development,quality and yield.The results showed that the cultivation technique of transplanting strong seedlings with high stem in the ridge with plastic film cover could promote mineralization and release of the organic nitrogen in soil,help tobacco plants grow more roots and absorb nutrients in advance, and raise tobacco yield,and that the nicotine content of the upper tobacco was reduced because the nitrogen supply in soil decreased and the root activity of tobacco plants declined at later growth period.