古代我国的森林,除寒冷地带针叶林外多为阔叶林。然而,这些阔叶林伴随着开发及向高生产率针叶林转换而日益减少,近年来这种倾向不但没有减弱,反而更为加强了。阔叶林面积1960年曾占森林总面积的60％,廿年后下降到50％。这当然是受到了扩大针叶树造林的极大影响。 Ancient China’s forests, in addition to the cold zone mostly coniferous forest broad-leaved forest. However, these broad-leaved forests, coupled with the declining development and transition to high-productivity coniferous forests, have not only not weakened, but have even strengthened in recent years. The area of ​​broadleaf forest once accounted for 60% of the total area of ​​forest in 1960, and dropped to 50% after 20 years. This of course has been greatly affected by the expansion of conifers.