[目的]对铜仁地区烟草漂浮育苗不同播期处理的条件下烟苗农艺性状进行系统的研究,以找出该地区烟草漂浮育苗适宜的播期.[方法]播种期以10 d为间隔,设置5个处理(①2009年12月22日；②2010年1月1日；③2010年1月11日；④2010年1月21日；⑤2010年1月31日),3次重复,采用随机区组设计.[结果]在不同播种期处理的条件下,1月21日播种的烟苗的各项农艺性状以及生理指标优于其他处理的烟苗,因此可以推断该地区适宜的播种期为1月20日左右到1月25日,因为该时期播种的烟苗的平均苗高、茎高、苗重、叶数、苗龄等农艺性状指标均优于其他处理.从当地的栽培制度看,该时段播种,能缓解前后茬争地矛盾,且烟苗成苗期能处在最佳的移栽期的范围.[结论]该研究可为该地区的烟草育苗及烤烟移栽提供指导.%[Objective] The agronomic characters of tobacco seedling treated with different seedtime in floating system had been systematically studied in Tongren area, in order to find out the fitting seedtime. [ Method] The seeding time was set as at intervals of 10 days, 5 treatments were set up(①2009-12-22, ②2010-01-01,③2010-01-11,④2010-01-21,⑤2010-01-31), repeating 3 times. This test was treated by a randomized block design. [ Result] Under the different seeding time, the agronomic characters of the seeding time of January 21 are better than those of the other treatments. It can be inferred that the suitable seeding time for this area is around January 20 to January 25. Because the planting of tobacco seedlings in the period, the average seedling height, stem height, seedling weight, leaf number, seedling age and agronomic character,indica are better than those of the other treatments. From local cultivation system it can ease the struggle for land conflicts before and after the crop in the range of the best transplant period. [Conclusion] The study could provide the instructions for the seedlings and tobacco production in this area.
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