烟草包衣种子溶农药、肥料、生长剂为一体,具有节约种子、营养生长快、促进发育、减少病虫危害等优点。但包衣种子未经播前处理直播,在同样条件下比催芽的种子晚出苗20天。而且,从播种至出苗时间长,苗床表土水分蒸发,凝聚在拱棚膜上的小水珠,流向拱棚两侧,形成苗 Tobacco coating seeds soluble pesticides, fertilizers, growth agents as a whole, with the advantages of saving seeds, rapid vegetative growth, promoting development, reducing pests and diseases. However, the coated seeds were not sowed directly before sowing and the seeds were germinated 20 days later than the germinated seeds under the same conditions. Moreover, from sowing to the emergence of a long time, the surface water evaporation seedbed, condensed in the arch film on the small drops of water flow to both sides of the arch, forming seedlings