湖南省郴州市烤烟叶片发育过程中淀粉含量和差异分析

以云烟85为材料,对湖南省郴州市烤烟叶片发育过程中淀粉含量和差异分析作了研究。结果表明,淀粉含量在叶片发生的初期维持在一个较低的水平,然后迅速上升,部位间规律有较明显的差异。下部烟叶积累淀粉的主要时期是30～50d叶龄,在40d叶龄以前下部烟叶的淀粉的积累速度大于分解速度,烟叶中淀粉的积累速度小于分解速度。中部烟叶除了第8～10叶位的烟叶在30～50d叶龄时淀粉积累强度小于降解强度,其淀粉的积累强度基本上一直高于降解速度,最高时期是70～80d叶龄。上部烟叶在30d叶龄以前积累的淀粉量较少,30d叶龄以后,淀粉的积累迅速上升。对发育过程中烟叶的淀粉含量进行方差分析结果表明,不同叶龄和部位间均达到极显著水平。

Analysis of the Content and Variance of Starch in Flue-cured Tobacco Leaves of Hunan Chenzhou During the Growth Periods

The content and variance of starch in flue-cured tobacco leaves were analyzed with Yunyan85,and the results indicated as follows.The content of starch remained at a lower level during the earlier periods,and then rising rapidly.The rule of different stalk position was difference.The main stages of starch accumulate during 30～50 days after the leaf appeared.In the previous 40 days after the leaf appeared,the accumulation rate of starch was faster than decomposition rate,then it was contrarily during the next stage.During development stage,the starch accumulation rate of cutters was faster than decomposition rate except the 8～10 node that was lower from 30～50 days.From 70～80 days,it was the highest intensity period of the starch accumulation.Before 30 days age,the volume of starch accumulation was little,then it had a sharply increasing during the next stage.The results of variance analysis of starch content indicated that the starch of each node due to leaf age and leaf position all exhibited a signi cant variation.