不同光质处理对云烟87生长及品质的影响

Influence of Different Light Qualities on the Growth and Quality of Flue-Cured Tobacco

通过对烟草植株覆盖红、黄、蓝滤膜获得红、黄和蓝光.研究了3种光质对云烟87生长及品质的影响.结果表明:①红光促进烤烟的生长,使株高和茎围增加,而黄光对烤烟的生长有抑制作用,使株高和茎围低于对照.②3种光质处理能使烤烟叶片最大叶长和最大叶宽增加,在处理的各个时间段,红光处理下的烟叶最大叶宽最宽,说明3种光质处理对叶片的形态有影响.③3种光质处理能使烤烟叶片数减少,在处理的15,45和60d,黄光处理的烟叶叶片数最少,显著少于对照.④3种光质下的烟叶氮、氯、钾质量分数以及钾氯比均高于对照.⑤黄光处理能降低烟碱的质量分数,红光和蓝光处理使烟碱质量分数增加.⑥化学协调性评价分值结果表明,黄光和红光处理的烟叶属于较协调,蓝光处理和对照的属于协调.

In order to clarify the influences of different light qualities on the growth and quality of flue-cured tobacco （Nicotiana tabacum）, the cuhivar Yunyan 87 was grown under different illuminant conditions by covering the plants with red, yellow or blue plastic films. Red light treatment tended to promote tobacco growth and increase plant height and stem circumference, while yellow light trended to inhibit the growth of tobacco, resulting in lower plant height and stern circumference than those of the control. All the three light treatments increased the maximum leaf length and maximum leaf width of flue-cured tobacco leaves, and in various treatment stages the red light treatment gave the largest width of maximum leaf width, suggesting that the light quality treatments may influuence the morphology of tobacco leaves. All light quality treatments reduced the number of flue cured tobacco leaves. Recorded on the the 15 th, 45 th and 60 th day after the commencement of the treatment, the yellow light treatment had the smallest number of leaves, which was significantly lower than the control. The contents of nitrogen, chlorine and potassium of the tobacco leaf and the potassium-to-chlorine ratio were higher in all treatments than in the control. Yellow light treatment reduced nicotine content of the tobacco leaf, while red and blue light treatments increased it. The coordination chemistry evaluation scores showed that tobacco of yellow and red light treatments fell into the category of ＂comparative coordination＂ and that of blue light treatment into the category of ＂coordination＂.