苹果砧木—海棠种子的沙藏和催芽答河北省青县读者伏焕阳在１月份将海棠种子放入３０～３５℃温水中浸泡２４小时，捞出后在阴凉处晾干，再加５倍于海棠种子的湿沙拌匀（湿沙以手握成团、触之能散为度）；选高燥、排水良好、阴凉、背风的露地挖沟，沟宽６０～８０ｃｍ左右... Apple rootstock - Begonia seeds of the sand reservoir and germination A. Green County, Hebei Province readers Fu Huan Yang Begonia seeds in January to 30 ~ 35 ℃ immersed in warm water for 24 hours, remove and cool in the air to dry, plus 5 times Begonia seeds in the wet sand and mix well (wet sand to hold into a group, the touch can be dispersed into degrees); election high dry, good drainage, cool, leeward open pit trenching, ditch width 60 ~ 80cm or so ...