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省农科院张掖试验场从1986年开始进行低产果园改造技术研究工作,经过三年努力取得了均衡生产,提高品质,增加产量,经济效益显著的较好成效。一、果园基本情况及低改目标我场果园面积2688亩。各类果树总株数63944株。投产果园2163.7亩,共设20个小区。以历年各小区果园管理情况和改造前两年,即一个小年一个大年的平均产量为依据,将果园小区划分为三类。低改工作从1986年开始,1990年结束。届时要求一类果园441.8亩,由低改
Provincial Academy of Agricultural Sciences Zhangye Experimental Site began in 1986, low-yield orchard transformation technology research work, after three years of efforts to achieve a balanced production, improve quality, increase production, significant economic benefits and better results. First, the basic situation of the orchard and low-change goal My field orchard area of 2688 acres. The total number of various types of fruit trees 63944 strains. The orchard 2163.7 mu, a total of 20 community. According to the management of each district orchard and the two years before the transformation, that is, the average output of a big year in a small year, the orchard district is divided into three categories. Low-change work since 1986, the end of 1990. At that time, 441.8 mu of the first-class orchards will be required to change from low to low