杨树(指意杨、欧美杨及各种杂交杨)这一世界著名的速生丰产用材树种,以前一般认为只适宜在平原湖区栽培。但广大农民群众勇于开拓创新,已经成功地将其引种扩大栽培到丘陵山区。实践已经证明,丘陵山区也可以栽培杨树。但同时发现,其生长速度、生长质量却不尽人意,实现应有的速生 Poplar (referring to poplar, Europe and the United States poplar and Yang hybrid) the world-famous fast growing timber species, previously generally considered only suitable for cultivation in the plain Lake area. However, the vast majority of peasants have the courage to pioneer and innovate and have succeeded in expanding their cultivation to hilly areas. Practice has proved that hilly areas can also be poplar cultivation. However, at the same time, it is found that the growth rate and the quality of growth are unsatisfactory and the fast-growing life should be achieved