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1981、1983年先后二次引进美国火炬松36个地理种源,选择能代表江苏丘陵山区气侯、土壤条件的南京市老山林场、江宁县东善桥林场东善、云台分场和东海县李埝林场等地造林试验。经多年观察研究,初步掌握了火炬松在江苏的地理变异规律,初选出了适合江苏不同地区生长的优良种源6个。其高、径、材积生长量比对照(湖北火炬松)大21.35—83.33％。进一步证明火炬松优于湿地松和马尾松。
In 1981 and 1983, it introduced 36 geographic provenances of the United States for the second time. It selected the Laoshan Forest Farm in Nanjing, which can represent the climate and soil conditions in the hilly and mountainous areas of Jiangsu Province, the Dongshan and Yuntai Forest Farms in Dongshanqiao, Jiangning County, and the East China Sea Afforestation experiment in Li County Forest Farm and other places. After many years of observational research, we initially mastered the law of geographical variation of Pinus taeda in Jiangsu and initially selected 6 fine provenances suitable for growing in different regions of Jiangsu. Its height, diameter, volume growth than the control (Hubei loblolly pine) 21.35-83.33%. Further prove that loblolly pine is superior to pine and pine.