“湿地松、火炬松种源试验”是中国林科院林研所等单位承担的国家“六五”、“七五”科技攻关专题。经过8年的系统研究,共营造种源试验林2 300亩,建立基因库4处,取得了显著成绩:(1)初步摸清了湿地松、火炬松种源遗传变异规律;(2)针对我国南、中、北亚热带不同气候区,分别选出一批湿地松、火炬松优良种源,并提出了适生栽培区。其材积增益 “Pinus elliottii and Exotic Torch Test” is a topic of scientific research of “Sixth Five-Year Plan” and “Seventh Five-Year Plan” undertaken by China Forestry Research Institute and other units. After 8 years of systematic research, a total of 2 300 mu of provenance forests have been established and 4 gene banks have been established. Significant achievements have been made in the following aspects: (1) The genetic variation of provenances of Pinus elliottii and Pinus taeda have been found; (2) A number of excellent provenances of Pinus elliottii and Pinus taeda were selected in different climatic zones of South, Central and North subtropics in China, and suitable cultivation areas were proposed. Its volume gain