烤烟叶片形状因素与叶片水分关系研究

目的]探明烤烟鲜叶的形状因素与其水分之间的关系规律。方法]以云烟99为试验材料,选取其处于旺长期的鲜叶60片,采用传统方法测定叶片的形状因素参数及水分参数并进行分析。结果]覆膜及未覆膜的烤烟鲜叶叶片重量和叶片含水量均随叶片长度、叶片宽度的增加呈近似直线的增加,且叶片宽度对其影响比叶片长度对其影响显著,因此可以选择叶片宽度作为诊断叶片重量和含水量大小的主要因素;鲜烟叶含水率与叶片宽度、叶片伸缩率和叶片面积这些形状因素相关性很小,线性相关系数几乎为0;未覆膜的叶片含水率稍大于覆膜的叶片含水率,所以在旺长期雨量充足的情况下,覆膜对保水作用不大。结论]可选择叶片宽度作为诊断叶片重量和含水量大小的主要因素。

Correlation between Leaf Moisture Content and Shape Factor of Flue-cured Tobacco Leaves

Objective] To explore the relation laws between moisture content and shape factor of flue-cured tobacco leaves.Method] With Yunyan 99 as the test material, 60 fresh leaves at vigorous growing stage were selected.Traditional method was used to detect the shape factor parameters of leaves and the moisture parameters.Result] Leaf weight and leaf moisture content of flue-cured tobacco fresh leaves with or without mulching showed approximate linear increase with the enhancement of leaf length and width.However, leaf width had more significant impacts than leaf length.Therefore, leaf width could be selected as the main factor to diagnose leaf weight and moisture content.Moisture con-tent of fresh tobacco leaves had very small correlation with leaf width, leaf stretching rate and leaf area.The linear correlation coefficient was almost 0.Leaf moisture content without mulching was slightly greater than that with mulching.Therefore, under the abundant rainfall in vigor-ous growing stage, mulching had poor soil water retention. Conclusion] Leaf width can be selected as the main factor to diagnose leaf weight and moisture content.