国外松的丰产栽培○尹维万湿地松、火炬松统称为国外松，是从美国南方引进的速生针叶树种，也是生产松脂、纸浆的重要原料和建筑用材。这两种松树适应性强、生长快，经济效益高，是我国南方各省区营造丰产林的主要树种之一。它的主要栽培技术要点：择地择树适地适树是适生... Abundant cultivation of foreign pine ○ Yin Wendan Slash pine, loblolly pine collectively referred to as foreign pine, is the introduction of fast-growing conifer species from the South of the United States, but also the production of turpentine, pulp, an important raw material and construction timber. These two kinds of pine adaptable, fast growth, high economic efficiency, is one of the major tree species to create high yield forest in the southern provinces of our country. The main points of its cultivation techniques: choose suitable tree suitable tree is suitable ...