1985年汇集了山东省林业厅1980年在全省各地选出的153个国槐优良单株、优良类型,并采用复幼繁殖技术获取了自根系。经过苗期测定和两次造林试验和多性状测定观察,最终选育出‘曹州槐1号’、‘曹州槐2号’、‘曹州槐3号’等3个国槐新品种。其材积生长量均超过对照56.5%以上,具有速生、干形通直、树皮光滑、抗性较强等优良特点,有较高的观赏价值。 In 1985, a total of 153 excellent acanthopanax japonicum plants were selected from the Department of Forestry of Shandong Province in 1980, and excellent self-root types were obtained from the rejuvenation techniques. After seedling determination, two afforestation experiments and multi-trait observation, three new Sophora japonica cultivars, “Caozhou Huai 1”, “Caozhou Huai 2” and “Caozhou Huai 3”, were finally bred. Its volume growth were more than 56.5% of the control, with fast-growing, dry straight, bark smooth, strong resistance and other fine features, have a higher ornamental value.