为了丰富我省杨树品种资源和进一步提高木材产量,我省于1981—1985年对中国林科院林研所利用从国外引进的基因资源培育出的第一代速生杨树进行了引种试验,经过6—8年选育,筛选出生长量超过Ⅰ—214杨的中林14、中林23、中林46、中林28等4个优良品种,在我省条件下具有插条、造林成活率高,最为速生、耐寒、抗病虫、适应性广等特点,而且属早期速生品种,适宜短轮伐期作业,可以在全省平原地区推广。 In order to enrich the resources of poplar species in our province and further improve the timber production, the province introduced the first generation rapid-growing poplar developed by the Institute of Forest Research of China Academy of Forestry from 1981 to 1985 using gene resources imported from abroad. After 6-8 years of breeding, four elite varieties, Zhonglin 14, Zhonglin 23, Zhonglin 46, Zhonglin 28, whose growth exceeded that of I-214 were screened, and cuttings and afforestation survived in our province High rate, the most fast-growing, cold-resistant, pest-resistant, wide adaptability and other characteristics, but also early fast-growing varieties, suitable for short-rotation operations, can be promoted in the plains of the province.