中文摘要：

为缩短达州市低温寡照烟区烟草育苗期和提高壮苗培育水平,将播种后的育苗盘放置在室内恒温光照培养箱中进行增温补光催苗处理,促进种子快速萌发和幼苗生长,再将不同苗龄烟苗从室内转入室外常规育苗棚继续培养成苗,测定烟苗生长速度和不同苗龄烟苗培养成苗的农艺性状、叶绿素含量和根系活力等烟苗素质指标。结果表明：随着催苗时间的延长成苗时间缩短,茎高、叶片数、根干重均呈下降趋势,而茎围、茎鲜重、叶绿素a及总叶绿素含量、根系活力呈上升趋势;茎干重、一级侧根数、二级侧根数、叶绿素b含量均与室外常规育苗没有明显的差异。综合比较,催苗至出苗期培养的烟苗达到壮苗要求,且育苗成本较低,并可有效缩短育苗期,实现适时移栽。

英文摘要：

In order to shorten tobacco seedling stage in low temperature and sunlight area of dazhou and improve the level of culturing tobacco strong seedling,the floating seedling trays after sow tobacco seeds were teated by increasing the temperature and light in constant temperature illumination incubator indoors.It accelerated seeds germination and seedlings growth,then took the seedlings of different seedling stages outside into the seedling shed for general use,and were cultured forming plantlets.The growth rate of seedlings,agronomic traits,chlorophyll content and root activity were determined.The results showed that as prolong the time of accelerating seedling,the seedling stage shorten,the stem height,number of leaves and root dry weight declined,but the stem girth,stem fresh weight,the content of chlorophyll a and the total chlorophyll content were on the rise.The Stem dry weight,the number of first-order lateral root and second- order lateral root,and the content of chlorophyll b were no significant differences with conventional breeding.After comprehensive comparison,the tobacco seedlings by accelerating seedling to emergence stage met the requirements of strong seedling,the cost of culturing seedling was lower,and the seedling stage shortened in effectively,the timely transplanting was realized.