烟苗剪叶次数对井窖式移栽烟株生长发育的影响

Effects of Repeating Clipping of Seedlings on Growth and Development of Flue-cured Tobacco Plants by Well-Cellar Transplanting

为通过剪叶措施合理调控烟苗大小,培育适宜井窖式移栽的烟苗,设置了不同剪叶次数的烟苗进行井窖式移栽对比试验.结果表明：第一次剪叶（只剪大叶的1/3～1/2）后3d和第二次剪叶后3d的烟苗较适宜井窖式移栽,移栽后大田烟株还苗期缩短,地上部干物质积累量较大,株高、茎围、最大叶长宽、顶叶长宽等农艺性状表现较好,烟叶单叶质量、产量、产值、均价、上中等烟比例提高;且第一次剪叶后3d移栽可明显降低育苗的管理成本.因此,在烤烟生产中建议采用剪叶一次后3d的烟苗进行井窖式移栽.

In order to control the growth of tobacco seedlings and provide seedlings suitable for well-cellar transplanting, a contrast experiment of repeating clipping was carried out. The results showed that tobacco seedlings were more suitable for well-cellar transplanting on the third day after the first clipping （only 1/3 to 1/2 of the area of larger leaves was removed） or the second clipping; the restoring period of the transplanted tobacco plants in field was shorter, the amount of dry matter accumulation in tobacco shoot was larger, the agronomic characters, such as plant height, stalk circumference, length and width of the largest leaf and tip, were better, and single leaf weight, yield, output value, average price and percentage of high and middle grade leaf increased. Furthermore, transplanting on the third day after the first clipping could reduce the cost of seedling culturing obviously. Therefore, it is recommended to practice well-cellar transplanting on the third day after the first clipping in flue-cured tobacco production.