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一般认为要生产出移栽到大田后生长良好的壮苗,苗床的烟苗密度应为每平方呎(合929平方厘米)110～120珠,一些烟农能用一英两(约合28.35克)的烟籽在204.38～222.96平方米的苗床面积获得良好的全苗,然而别的烟农用同量的烟籽却难于在167.22平方米苗床中获得足够密度的全苗,显然在这两个极端间对烟籽的发芽和幼苗的存活存在着条件的差异。影响烟籽发芽和烟苗存活的两个主要因素是苗床内可溶性盐类的含量和浇水程序。
It is generally believed that to produce strong seedlings that grow well after transplanting to the field, the seedling density of the seedbed should be 110 to 120 beads per square foot (929 cm 2), and some farmers can use one British and two (about 28.35 grams) While the seedlings of 204.38 ~ 222.96 square meters had good seedling coverage, other tobacco farmers could not get enough seedlings in 167.22 square meters of seedbed with the same amount of tobacco seed, apparently between these two extremes There are different conditions for the germination of tobacco seeds and the survival of seedlings. The two main factors that affect the germination of tobacco seed and the survival of tobacco seedlings are the content of soluble salts in the seedbed and the watering program.