朝阳属辽西冷凉半干旱地区,李子栽培较少,且品种单一。为了丰富品种组成,满足人民生活和市场的需要,选择适应当地气候的优良李品种,我所自1974年以来开始李品种的引种试验。经十几年观察表明,由北京引进的晚 Aspen is a cool and semi-arid western Liaoning Province, plum cultivation less, and a single species. In order to enrich the composition of varieties, meet the needs of people’s life and market, and select the fine varieties of Li that adapt to the local climate, we have introduced the introduction test of Li varieties since 1974. After more than 10 years of observation shows that the introduction of Beijing by the late