果树工作者的任务之一是如何加速繁殖大量优良、健壮、无病虫害、合乎出圃规格的各种果树苗木,以满足生产发展的需要。果树生产是百年大计,果苗质量的好坏将直接影响果树的生长与结果。在繁殖果苗中,为了获得强大的根系,以适应山地果园干旱、土地瘠薄的不良条件,生产上多采用种子播种培育实生砧木苗。一般来说,播种的野生砧苗,如我省梨树的砧木棠梨(Pyrus pashia)、苹果砧木丽江山定子(Malus Rockii)、石屏野海棠(Malus hupehen- One of the tasks of the fruit tree worker is how to speed up the multiplication of large quantities of various fruit tree seedlings which are excellent, robust, disease-free and pest-free, and meet the requirements of production development. Fruit production is a hundred years plan, the quality of fruit seedlings will directly affect the fruit tree growth and results. In breeding seedlings, in order to obtain a strong root system, in order to adapt to the mountainous orchards, poor barren land conditions, the production of seedlings planted to grow more seedlings of real seedlings. In general, sown wild stocks such as Pyrus pashia, Malus Rockii, Malus hupehen-