大田旺长期季节性干旱对白肋烟烟碱转化性状的调控效应

Regulation Effect of Seasonal Drought in Field Fast Growing Period on Burley Tobacco's Nicotine Conversion

为了解旺长期干旱对白肋烟中烟碱向降烟碱转化的调控效应,通过控制大田烟株旺长中、后期土壤相对水分含量,以研究大田土壤相对水分含量对白肋烟中烟碱向降烟碱转化的影响。结果表明,在晾制过程中,大田旺长期(轻度)干旱(土壤相对含水量为最大田间持水量的60%)处理导致B37高转化株烟碱转化率的变化存在差异,但始终低于对应晾制时间点正常供水处理烟叶的烟碱转化率;不同水分处理下,B37非转化株烟叶烟碱转化率均保持在较低水平,处理间差异不明显;在大田旺长期(轻度)干旱(土壤相对含水量为最大田间持水量的60%)有利于降低高转化株烟叶的降烟碱含量和烟碱转化率,一定程度上能够提高非转化株烟碱转化性状的稳定性。

In order to research the controlling of drought in fast growing period, this paper through controlling the （field） soil water content in fast growing period of mid-later phase, researched the effect of soil water content on burley tobacco ＇ s nicotine conversion. The results showed that slight drought of soil （60% soil moisture） in fast growing period led to high converter ＇ s nicotine conversion difference between drought and normal water supply treatments among the air-curing period, which was lower than high converter ＇ s nicotine conversion of normal water supply all the time. Non-converter of different soil water supply treatment had similar percent of nicotine conversion （PNC）, and they were all in low level. The slight drought treatment （60% soil moisture treatment） in fast growing period was benefit to decrease high converter ＇ s nornicotine content and PNC, meanwhile, also could increase non-converter ＇ s stability in nicotine conversion character at a certain extent.