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在梨、苹果等的育苗生产中，决定育苗成败的主要因素就是砧木的可嫁接率。常用的种子直播方法要采取大面积的土壤消毒、灌水、防风、防病等措施，不仅成本高，效果也不好，往往是播种很多，能嫁接的很少。特别是辽宁省春季干旱少雨，风沙大，在幼苗没木质化前一场大风沙或立枯
In pears, apples and other seedling production, the main factor that determines the success or failure of nursery stock is the grafting rate of rootstocks. The commonly used method of direct seeding of seeds should adopt measures such as large-area soil disinfection, irrigation, wind-proofing and disease prevention. It is not only high in cost but also ineffective in soil seeding. Especially in Liaoning Province, the spring arid and dry, windy, large seedlings in the absence of lignification or Liqu