杨树生长快、产量高、适应性强,是山东省平原地区营造用材林、农田防护林的主要造林树种。据统计,目前全省杨树用材林面积已增加到240万亩,其中速生丰产林150万亩,约占全省丰产林总面积的60％,林网和四旁栽植的杨树也达4.5亿株,全省杨树林木蓄积量增加到1400万m~3左右,约占省内林木总蓄积量的30％。因此,合理利用杨树资源成为当前急待解 Poplar grow fast, high yield, strong adaptability, is the main afforestation tree species in Shandong Province plains to create timber forests, farmland shelterbelt. According to statistics, at present, the area of ​​poplar timber in the province has increased to 240 million mu, of which 150 million mu are fast-growing and high-yield forests, accounting for about 60% of the total area of ​​the province’s high-yield forests and 450 million poplar trees planted alongside the forest network , The poplar tree reserves in the province increased to 14 million m ~ 3, accounting for about 30% of the total forest volume in the province. Therefore, the rational use of poplar resources has become the urgent solution