火炬松从美国引进我国,表现出速生、抗性强等优良性状。但由于引进的火炬松结实迟而少(据资料介绍,一般林分十四年结实,安徽省马鞍山市林场的结实较早,也达六年),种源困难,不能适应造林事业发展的需要。我县经营的火炬松全部培育为母树林,原以为要七、八年才能始花,现在仅三年时间就已始花,并结了 Introduction of loblolly pine from the United States, showing rapid, strong resistance and other fine traits. However, due to the introduction of the flamingo sturdy late (according to the information, the general stand 14 years of solid, Maanshan City, Anhui Province, the sturdy earlier, but also up to six years), provenance can not adapt to the needs of the development of afforestation . I County County management of all cultivated as a parent plantation of loblolly pine, originally thought to be seven or eight years before the beginning of flowers, flowers are now only three years, and the end