封闭式集约化立体漂浮育苗技术的应用效果

摘要

Due to the continuous low temperature during the early-nursery period in most tobacco-growing areas in Guizhou Province, the tobacco seed germinate slow-ly, the nursery period is prolonged, the quality of tobacco seedlings are not that good, the transplanting is delayed, etc. A comparative test of intensive closed-type floating-seedling system and conventional floating-seedling system was carried out in this study. The results showed that the intensive closed-type floating system could shorten significantly the nursery period; enhance the growth of tobacco seedlings;improve significantly the appearance of agronomic traits, such as number of leaves, stem height, stem diameter, fresh weight of leaves, etc; increase slightly the chloro-phyl content in seedlings. However, the root fresh weight and root vigor of seedlings nursed with the intensive closed-type float system were lower than that of seedlings nursed with the conventional float system. The intensive closed-type float system had a certain application potential in tobacco production.%该研究针对贵州省多数产烟区育苗前期因持续低温，烟草种子萌发缓慢、育苗时间延长、烟苗品质不佳、移栽期延后等问题，开展封闭式集约化立体漂浮育苗和常规漂浮育苗对比试验。试验结果表明，封闭式集约化立体漂浮育苗可明显缩短出苗时间，加快烟苗生长速度，显著提高烟苗的叶数、茎高、茎粗、叶片鲜重等农艺指标，叶绿素含量指标略高于常规漂浮苗，地下部鲜重、根系活力指标低于常规漂浮苗。因此该育苗技术有一定的推广价值。