火炬松原产美国，是重要的用材和纸浆材树种。１９７５年豫南山区开始引种，因其抗病、速生（比当地马尾松生长量大３３８倍），深受广大群众喜爱。１９９０年作为速生用材树种纳入县世行贷款造林项目大力发展。为了提高苗木质量和造林成活率，多年来在不断探索育苗新技... The United States loblolly origin, is an important timber and pulpwood species. In 1975, mountainous areas in southern Henan began to be introduced. Because of its resistance to diseases and fast-growing (338 times more than that of native masson pine), it is deeply loved by the general public. In 1990, it was included in the World Bank loan afforestation project as a fast-growing timber species and developed vigorously. In order to improve the quality of seedlings and afforestation survival rate, over the years continue to explore new technology seedling ...