我场遵照伟大领袖和导师毛主席关于“有了优良品种,即不增加劳力、肥料,也可获得较多的收成”的教导,从1969年起,对我场原上山的梨树不结果,果实品质差,不抗病虫害的品种进行了较大面积的高接换种工作,已换梨树6500多株,据历年梨子产量统计,69年梨的最高年产量在4000斤以下,而换种后71年即上升为11万斤,三年增长27倍多,73年上升为16万斤,增长40倍多,77年上升为35万多斤,增长88倍多。从以上几 In accordance with the teachings of great leaders and mentors Chairman Mao on the principle of “having excellent cultivars, that is, more harvests can be obtained without increasing manpower and fertilizers”, since 1969, Fruit quality is poor, not pest-resistant varieties of a large area for the high-substitution work, has been replaced by more than 6,500 pear trees, pears according to calendar year statistics, the highest annual output of 69 pear in 4000 kg or less, and change After 71 years it increased to 110,000 jin, three years increased by 27 times, 73 kilos rose to 160,000 jin, an increase of 40 times, 77 years to 350,000 kilos, an increase of 88 times. From the above few