论文部分内容阅读
杨树无论在国土绿化、农田防护林建设,还是在工业用材林建设方面都占据着越来越重要的地位。据预测,到2015年,我国木材的年需求量将达到3.3亿立方米￣3.4亿立方米,供需缺口将达1.4亿立方米￣1.5亿立方米。这一严峻的现实迫使我们必须加快速生用材林基地的建设来缓解这一矛盾,以较短的时间提高木材供给能力。杨树具有生长快、成材早、产量高、材质优良及易于更新等特点,成为最适合短轮伐期工业用材林经营的树种。
Poplar is occupying an increasingly important position both in the afforestation of green land, in the construction of farmland shelterbelt, and in the construction of industrial timber forests. It is predicted that by 2015, China’s annual demand for timber will reach 330 million cubic meters ~ 344 million cubic meters, supply and demand gap will reach 140 million cubic meters ~ 150 million cubic meters. This grim reality compels us to speed up the construction of fast-growing timber base to alleviate this contradiction and to improve the timber supply capacity in a relatively short period of time. Poplar has the characteristics of fast growth, early harvest, high yield, good material quality and easy renewal, making it the most suitable species for management of short-rotation industrial timber forests.