不同海拔高度对白肋烟茎叶生长发育动态的影响

在四川达州生态条件下研究了不同海拔高度(700 m,1 000 m,1 300 m)对白肋烟生长发育动态的影响。结果表明,白肋烟株高、有效叶数、叶面积、茎围等生长发育动态均符合前期慢、中期快、后期又慢的变化规律,海拔高度对各指标的变化模式有显著影响。在海拔700 m条件下,茎秆、叶片进入快速生长期早,生长速率高,茎叶生长主要集中在移栽后40~60 d,移栽后68 d即进入打顶期,之后茎粗继续增加。随着海拔高度的增加,烟叶生长发育变慢,表现为进入快速生长期变晚,生长速率降低,特别是在1 300 m高海拔地区,出叶晚,茎叶生长慢,烟株打顶期比海拔700 m处理晚15 d,砍收期晚30 d,不利于正常成熟和晾制。

Effects of Altitute on Dynamic Changes of Growth and Development and Dry Matter Accumulation of Burley Tobacco

The effect of altitute(700m,1000m,1300m) on the dynamic changes of growth and development and dry of burley tobacco was studied in Sichuan area.The results showed that the plant height,number of leaves,leaf area and stalk perimeter were all in line with the "Logistic" growth model,while altitute had significant effect on the changing parameters.Under lower altitute of 700m,leaf and stalk entered fast-growth stage early,with high growth rate;the major growth period was from 40d to 60d after transplanting,and the plant was topped 68d after transplanting,then the upper and middle leaf area and stalk perimeters continued to increase.With the increase of altitute,especially at the altitute of 1300m,the growth and development became slow,the middle and upper leaf group appeared late and grew slowly,the topping date was15 days later than that at the altitute of 700m,and the harvest date was 30 days late,which was not conductive to the normal mature and air-curing.