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在苹果实生砧木苗的培育过程中,因播种深度不易掌握,病虫危害等原因,造成出苗率低,一般每公斤海棠种子只能出苗6000株左右,苗圃中缺苗断垄现象比较严重,而且根系发育差,大多只有一条主根和一些毛细根。近年来,采用苗床育苗,大田移栽法,平均每公斤海棠种子出苗30000株左右,比大田直播增加数倍,而且苗木整齐,侧根发达,病虫害少,其具体措施如下:
Apple rootstock seedlings in the cultivation process, due to difficult to grasp the depth of sowing, pest damage and other reasons, resulting in low emergence rate, generally only about 6000 per kilogram of seedlings of Begonia seedlings, nursery seedlings missing ridge phenomenon is more serious, and Root development is poor, mostly only a main root and some capillary root. In recent years, the use of seedling nursery, field transplanting method, the average seedlings per kilogram of Begonia seedlings about 30000 times more than the field live increased several times, and nursery stock and tidy, lateral development, less pests and diseases, the specific measures are as follows: