１９９３～１９９６年在保定市的易县、高阳、清苑、阜平、蠡县等地，对大石早生李的生长、结果、适应性、果实品质等进行了研究。结果表明：该品种适应性强、生长旺盛；结果早、丰产性能好、经济效益高；果实色泽艳丽，品质上乘；栽培管理技术简单；病虫害少，容易控制，是一色、形、味俱佳的极早熟优良品种，适合河北省大部分地区栽培、发展。 From 1993 to 1996, the growth, results, adaptability and fruit quality of the early pears of Dashi were studied in Yixian, Gaoyang, Qingyuan, Fuping and Yixian in Baoding. The results showed that this variety had strong adaptability and vigorous growth; the results were good at early and high yield, with high economic benefits; the fruit was gorgeous and of good quality; the cultivation and management techniques were simple; the diseases and insect pests were few and easy to control; Very early excellent varieties, suitable for cultivation and development in most parts of Hebei Province.