桃、李“三当”育苗(当年播种、当年嫁接、当年出圃)是快速繁殖优良品种、提高苗圃利用率的经济有效方法,但“三当”育苗必须注意砧苗和嫁接苗的精细管理。 (1)培育健壮砧木苗:砧木可选毛桃、杏、梅、李等,其中以毛桃砧最好,根系发达,耐瘠,耐旱.亲和力强。播种期秋播和春播均可 Peach, plum, “three when” nursery (sowing then, then grafting, then out of nursery) is to quickly breed fine varieties and improve the utilization of nursery cost-effective method, but the “three when” nursery must pay attention to the fine management of anvil seedlings and grafted seedlings. (1) to develop robust rootstock seedlings: rootstock optional peach, apricot, plum, plum, etc., of which the best peach anvil, developed roots, barren, drought-tolerant. Sowing autumn and spring sowing can be