湿地松(Pinus elliottii.E),火炬松(Pinus taeda L.),以下简称“两松”,原产美国东南部,是荒山造林的速生用材树种。它具有适应性强、生长快、材质好、抗病虫害强的特点。三十年代引种到广东,1972年引进我省。1975年桐柏县国营毛集林场和国营陈庄林场先后引种。通过试验观察记载, Pinus elliottii.E and Pinus taeda L., hereinafter referred to as “two pine”, are native to the southeastern United States and are the fast-growing timber species afforested by afforestation in barren hills. It has strong adaptability, fast growth, good material, strong pest resistance characteristics. Thirty introduction to Guangdong, introduced in 1972 in our province. 1975 Tongbai County State-owned Maoji forestry and state-owned forest farm has introduced. Through the experimental observation records,