砧木建园是解决苹果幼树越冬伤亡的好方法。1984年春古浪县海子滩林场在新建的48亩密植园作了尝试,取得良好结果。一年生幼树全部露地越冬,无一伤亡,第三年有18％的树开花结果;第四年(1987年)生长健壮整齐,已有60％的树开花结果。他们的做法是: 一、采用抗性强的大砧木定植。1984年春用三年生的倒挂珍珠为砧木,以2×3米的株行 Rootstock garden is a good way to solve the apple tree overwintering casualties. Spring 1984 Gulang Haizitan Beach in the newly built 48 acres of dense plantation made an attempt to obtain good results. Annual saplings are fully exposed to the winter, no casualties, the third year, 18% of the trees flowering results; the fourth year (1987) robust growth and orderly, 60% of trees have flowering results. Their approach is: First, the use of large rootstocks resistant to colonization. The spring of 1984 with perennial inverted pearl rootstock to 2 × 3 meters of the line