留叶数对白肋烟叶片物理特性及化学成分含量的影响

Effect of remaining leaf number on the contents of leaf physical properties and chemical composition of burley tobacco

以白肋烟TN 86为材料,研究了不同留叶数对白肋烟叶片的物理特性、经济性状和内在化学成分含量的影响.结果表明,随着留叶数的增多,叶质重、单叶重和梗重都呈现逐渐降低的趋势,且上部叶>中部叶>下部叶.烟叶的含梗率呈现逐渐降低的趋势,且下部叶>中部叶>上部叶.留叶数为18片时,各个部位的叶长、叶宽和叶面积均最大,留叶数为27片时最小.还原糖和烟碱含量逐渐降低,烟碱含量在留叶数为18片和21片时较高,27片时在适宜范围内,24片叶较优;总糖含量表现为先下降再升高的趋势,总氮含量表现为先升高再降低的趋势;氮碱比逐渐升高;糖碱比逐渐升高,两糖比呈现先升高再降低的趋势,以留叶数为24片时,两糖比最高.随留叶数的增加,产量逐渐增加,产值和中等烟比例呈现先升高后降低趋势,均价和上等烟比例为先降后升再降趋势,均以24片最高.综合各项指标,白肋烟TN86以留叶数24片为宜.

This paper studies the physical characteristics, economic character and the intrinsic chemical composition of the different number of remaining leaves of hurley tobacco TN 86. The results showed that with the increase in the number of remaining leaves, table leaf quality weight , single leaf weight and stem weight gradually decreased, both showing a trend of uppers 〉 cutters 〉 luggs. Stem ratio tended to decrease, showing a trend of luggs 〉 cutters 〉 uppers. When the remaining leaf number was 18 and 27 restpectively various parts of the leaf length, leaf width and leaf area were maximum and minimum. Reducing sugar and nicotine content had the trend of decreasing; nicotine content was higher when the remaining leaf number was 18 and 21, and in the appropriate range when it was 27, when the remaining leaf number was 24, it was the best; the total sugar content first decreased and then increased and nitrogen content first increased and then decreased; nitrogen/nicotine had the trend of increasing ; sugar/nicotine had the trend of increasing ; total sugar/reducing sugar had first increased and then decreased, when remained leaf number when the remaining leaf was 24, it was the highest. With the increase in the number of remaining leaves tobacco production tended to rise; the output and fine tobacco ratio increased first, and then decreased, the average price and proportion of middle ratio first decreased and then increased, and all reached the highest level when the remaining leaf number was 24. All the indicators considered, the remaining leaf number 24 was appropriate for burley TN 86.