Method for factory seedling cultivation

The invention relates to a method for factory seedling cultivation. The method for factory seedling cultivation comprises the following steps: (1) preparing a field and a seedling field at a ratio of(80-200):1, and leveling the seedling field at least 15 days before sowing is conducted so as to obtain a seedling plate with a width of 1-1.5 m and a seedling ditch with a width of 0.2-0.3 m; (2) preparing rice bud discs with the corresponding number according to 25-28 discs per mu seedling field; (3) adding rice seeds to a seed soaking solution for seed soaking so as to obtain wet buds, whereinthe mass ratio of the seed soaking solution to the rice seeds is 1:(0.5-0.8), the seed soaking solution is obtained by diluting 25% of js399-19 suspension 2000-3000 times with water, and the soaking time is 48-60 h; (4) adding a seedling substrate of 2-3 cm thick to the rice bud discs, sowing the wet buds into the rice bud discs at a density of 150-200 g wet buds/disc, and then covering the wet buds with soil of 0.5-1 cm;