银川市区有果树面积5万多亩,其中老果园9076亩,产量最低的亩产只有55公斤,最高不过250公斤。大部分树势衰弱、内膛干枯,树形紊乱,病虫害严重,而且果园品种低劣混杂,已成为果树生产中急待解决的问题。为此,1988～1990年,经多点调查,对老果园分类分别进行了更新改造栽培技术试验。 Yinchuan urban area of ​​50,000 acres of fruit trees, of which 9076 acres of old orchards, the lowest yield of only 55 kg per mu, but up to 250 kg. Most of the trees are weak, the bore is dry, the tree is disorganized, the pests and diseases are serious, and the poor variety of orchards has become an urgent problem in fruit tree production. To this end, from 1988 to 1990, after many surveys, the old orchard classification were updated cultivation technology trials.