催芽型包衣种对漂浮育苗中烟苗生长的影响

Influences of Primed and Pelleted Flue-Cured Tobacco Seeds on the Growth of Tobacco Seedlings Produced by Float System

通过苗期试验,以烤烟品种K326,云烟85为材料,比较了催芽型烤烟包衣种和常规包衣种对漂浮育苗中出苗时间、出苗率以及根系、叶片干鲜重、根系活力等的影响.结果表明:催芽包衣种能显著提高漂浮育苗烟苗的出苗率,特别对提高烤烟幼苗出苗的速率和整齐度,缩短出苗时间等方面有较好的效果,催芽包衣种平均比常规包衣种提前3d左右出苗.催芽包衣种可以增加烟苗的株高,使茎秆伸长,促进根系的生长发育.无论是地上部还是地下部的物质积累量,催芽包衣种的烟苗都明显高于常规包衣种的;催芽包衣种对漂浮育苗烟苗的根系活力有明显的增加作用.

Through the test conducted during the seedling stage, the effects of primed pelleted seeds and non-primed pelleted seeds of two flue-cured tobacco varieties-K326 and Yunyan85. on germinating date, germination percentage as well as the fresh and dry weight of roots and leaves, and the roots＇ vitality of seedlings produced by float system was compared. The results showed that primed pelleted seeds could significantly increase the germination rate; it was especially true in speeding up the germination and uniformity, and shortening the germinating time; the germination of primed pelleted seeds occurred 3 days earlier than that of the non-primed pelleted seeds; the plant height, the extension of the stem, the roots development, the biomass accumulation for both above ground and underground, and the roots vitality, of the seedling, all were promoted by priming and pelleting of the seeds.