一、射种概况火炬松、湿地松简称国外松。这两种松原产于美国的东南部,在我国栽培已有40多年的历史。1974年开始在我市的八个试验点上试种。试种面积437亩。其中湿地松180亩,火炬松257亩。为了摸索它的生长规律,1981年我局组织技术人员对八个引种点进行了调查。从调查情况看,无论是在沙质土或在红黄粘壤土上,火炬松、湿地松都具有适 First, the profile of loblolly pine, pine referred to as foreign loose pine. These two species of pine originated in the southeastern United States have been cultivated in our country for more than 40 years. Beginning in 1974, eight pilot sites in our city to try. Test area of ​​437 acres. Of which 180 acres of Pinus elliottii, Pinus taeda 257 acres. In order to explore its law of growth, in 1981 I Bureau of technical personnel to conduct a survey of eight introduction points. Judging from the survey, both in sandy soil or in the red and yellow clay loam, loblolly pine, Pinus elliotis are suitable