大石早生李原产日本,该品种进入结果期早、成熟上市早、品质优良,具有很强的市场竞争力,经济效益和社会效益十分显著[1]。1994年,笔者从辽宁省果树研究所国家李杏种质资源圃引进大石早生李,在河北省进行引种试栽,经过5ａ的早期丰产栽培示范,取得了1年定植,2年见果,3年进入初果 Dashi early Lee native to Japan, the species into the early fruiting, mature early market, good quality, with strong market competitiveness, economic and social benefits is very significant [1]. In 1994, the author introduced the early pears of boulders from the national apricot germplasm resources nursery of Liaoning Province Fruit Tree Research Institute, and introduced and planted them in Hebei Province. After 5 years of early high yield cultivation and demonstration, Year into the beginning of fruit