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马尾松是我国特有的亚热带速生树种之一,是南方各省区最主要的商品材树种。全国现有马尾松林面积2110万公顷,蓄积量5.2亿立方米以上,分别占全国用材林总面积的21％,蓄积量的6.7％。贵州的土壤、气候尤其适宜马尾松生长,82个县市中有71个县市分布有马尾松,面积达72万多公顷,蓄积量约4300万立方米,分别占全省用材林总面积的35.6％,蓄积量的27.2％。随着造林的发展,今后马尾松的资源量还会大幅度增加。根据森林资源清查,在现有资源中,大部分是中幼林,如贵州中幼林的面积占87％、蓄积占73％。这些森林资源很大一部分是解放以后营造的人工林、飞播林,为了促进林木的生
Pinus massoniana is one of the perennial subtropical fast-growing tree species in our country, and is the most important tree species in the southern provinces. The existing masson pine forest area of 21.1 million hectares, volume of 520 million cubic meters or more, accounting for 21% of the total area of timber forests, 6.7% of the volume. The soil and climate in Guizhou are especially suitable for the growth of masson pine. In 71 counties and cities of 82 counties and cities, there are massoniana distributed in Masson, an area of more than 720,000 hectares and a stock volume of 43 million cubic meters, accounting for 35.6% %, The volume of 27.2%. With the development of afforestation, the mass of Pinus massoniana will increase significantly in the future. According to the inventory of forest resources, most of the available resources are middle-aged and young forests. For example, the area of young and middle-aged forests in Guizhou accounts for 87%, accounting for 73% of the total. A large part of these forest resources are planted forests and aerial seeding forests after the liberation, in order to promote the growth of forest trees