白云石粉施用量对重庆地区烟草农艺性状及品质的影响

[目的]研究不同白云石粉施用量对烟草农艺性状及品质的影响。[方法]采用随机区组试验设计,设置不同白云石粉施用量,通过田间小区试验,观测各处理烟草不同生育期株高、茎围、叶数等农艺性状;测定各处理烟草中部叶烟碱、总糖、还原糖、总氮含量及糖碱比等指标并进行品吸评价。[结果]白云石粉施用量为1 500 kg/hm~2的处理烟草长势最好,施用量为1 125 kg/hm~2的处理烟草长势最差,但仍强于对照组。施用白云石粉能够降低烟叶烟碱含量,增加烟叶总糖、还原糖含量及糖碱比,可改善烟叶品质,提高评吸等级。[结论]综合来看,以白云石粉施用量为1 500 kg/hm~2的处理效果最优。

Effects of the Application Amount of Dolomite Powder on the Agronomic Traits and Quality of Tobacco in Chongqing

Objective] To research the effects of application amount of dolomite powder on the agronomic traits and quality of tobacco.[Method] Randomized block test design was adopted.Application amount of dolomite powder was designed to carry out field plot experiment.Agronomic traits of tobacco in different treatments were observed,such as the plant height,stem girth and leaf number.Smoking indexes of the middle leaves were evaluated in different treatments,such as nicotine,total glucose,reducing sugar,total nitrogen and sugar-nicotine ratio.[Result] 1 500 kg/hm2 application amount of dolomite powder had the best growth vigor;while 1 125 kg/hm2 treatment showed the poorest growth vigor,which was still greater than the control group.Applying dolomite powder reduced the content of nicotine in tobacco leaves,increased the total sugar con-tent,reducing sugar content and sugar-nicotine ratio,improved the quality of tobacco leaves,and enhanced the smoking level.[Conclusion] Com-prehensively,1 500 kg/hm2 application amount of dolomite powder has the optimal treatment effects.