种子萌发需要适宜的水分、空气、温度等外界条件。多数种子播前都要进行浸种催芽,催芽前一般先浸泡种子,使其吸足水分,种皮变软。这样,胚根才容易突破种皮;种子内营养物质在含水充足的情况下才能转化,供幼芽生长。催芽时还应经常淘洗种子以促进种子发芽,但种子在萌发过程中同时 Seed germination needs appropriate moisture, air, temperature and other external conditions. Most seeds are sowing before sowing germination, pre-germination generally first soaked seeds, so that the suction enough water, the seed coat softened. In this way, radicle is easy to break through the seed coat; seeds within the nutrients in the case of sufficient water can be transformed for the bud growth. Germination should also often panning the seeds to promote seed germination, but the seeds in the germination process at the same time