朝阳县联合公社大三家大队果园有苹果树5,000株,其中95％是国光,还有少量梨树。由于果园授粉树不足和“锈果病”的危害,果树单产很低。为了解决上述问题,从1970年开始对国光的部分病枝病树以及部分幼树进行高接黄元帅。实践证明,果树高接后,既增加了果园授粉树,又 There are 5,000 apple trees in the Orchard of the Big Three Brigade of the United Commune in Chaoyang County, of which 95% are Guoguang and a few pear trees. Due to the lack of pollination trees in the orchard and the damage of “rust fruit disease”, the yield of fruit trees is very low. In order to solve the above problems, from 1970 onwards, part of the tree disease Guoguang diseased trees and part of the saplings high yellow marshals. Practice has proved that high fruit trees, after the addition of orchard pollination tree, and