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研究了烤烟品种粤烟97上部6片叶在一次性采收和分次采收方式下,叶片中烟碱积累量和叶片干重的变化规律。结果表明,随着叶片在烟株上停留时间的延长,烟碱积累量增加。一次性采收烟株总烟碱合成量比分次采收总烟碱合成量多。除顶6叶片可能由于成熟度过高导致烟碱降解转化或者叶片坏死以外,其余叶片烟碱积累量均大于分次采收,且烟碱在顶1、顶2、顶3之间的分配具有明显的顶端优势。一次性采收顶1、顶2、顶3和分次采收顶1叶片干重随在烟株上停留时间的延长而增加,分次采收顶2、顶3与一次性采收顶4、顶5、顶6叶位均呈前期升高后期降低的趋势。
The variation of nicotine accumulation and leaf dry weight in the upper six leaves of flue-cured tobacco variety Yueyan 97 was studied under one-off harvesting and graded harvesting. The results showed that the accumulation of nicotine increased with the prolongation of residence time of tobacco leaves. One-time collection of tobacco plant total nicotine synthesis than the total recovery of total nicotine synthesis. In addition to the top 6 leaves may be due to the maturity is too high lead to nicotine degradation or leaf necrosis, the remaining leaf nicotine accumulation were greater than the fractional recovery, and nicotine in the top 1, top 2, top 3 distribution has Obvious top advantage. One-time harvest top 1, top 2, top 3 and sub-harvest top 1 leaf dry weight with the extension of stay on the tobacco plant increased, sub-harvest top 2, top 3 and a one-time harvest top 4 , The top 5, the top 6 leaf position were pre-lower late trend decreased.