烤烟成熟过程中烟叶化学成分和干物质变化规律研究

为了解烟叶生理变化,掌握品种特性,以龙江911、JY-2-03和云87为试验材料,同等试验条件下,测定根系发育情况,叶绿素含量,鲜叶的主要化学成分以及烘烤后烟叶化学成分。结果表明,根鲜干重在移栽后70~80 d积累最快,并且根系活力达到最强。鲜叶总糖含量在移栽后40~50 d时有所下降,50~70 d开始上升,移栽后70 d又开始下降;还原糖含量的变化在整个生育期先升后降;总植物碱含量先上升后下降,移栽后70~80 d对烟碱的积累很关键。

Chemical Composition and Dry Matter Change of Tobacco Leaves during the Ripening of Flue-Cured Tobacco

In order to understand the physiological changes of tobacco leaves and master varietal characteristics, took Longjiang 911, JY-2-03 and Yun 87 as test material, under the same test conditions, the root development, chlorophyll content, the main chemical components of fresh leaves and the chemical components of flue-cured tobacco leaves were determined. The results showed that the root dry weight was accumulating fastest after transplanting 70-80 days, and the root vigor was the strongest.The total sugar content of fresh leaves decreased after transplanting 40-50 days, 50-70 days began to rise, and decline after 70 days; the content of reducing sugar increased first and then decreased at the whole growth stage; the total alkaloid content increased first and then decreased, after transplanting 70-80 days is the key to nicotine accumulation.