京山县园艺场1961年栽植果树3000余亩。现存果树680亩,其中梨树640亩,95%以上的品种为康德。长期以来,由于管理粗放,病虫为害严重,果品产量低,质量差。1974—1980年,平均亩产208.5公斤,三级果及等外果占60%以上。而且由于品种单 Jingshan County Horticultural Field 1961 planted more than 3,000 acres of fruit trees. The existing fruit trees 680 acres, of which 640 acres of pear trees, 95% of the varieties for the Kant. For a long time, due to extensive management, pests and diseases seriously, fruit production is low, poor quality. From 1974 to 1980, the average yield 208.5 kilograms, three fruit and other fruit accounted for more than 60%. And because of the variety list