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于 198 3年、 1984年在广西南宁地区林业科学研究所引种美国 8个州 47个湿地松 (Pinuselliottii)种源。以广东台山湿地松种子园、安徽马鞍山火炬松 (Pinustaeda)和本地马尾松 (Pinus massoniana)为对照。采用随机区组设计 ,重复 4次或 5次 ,试验表明 ,湿地松种源间生长差异显著 ,其生长性状的变异属地理渐变型 ,其它性状的变异则属随机型。优良种源主要分布在美国路易斯安那州到佛罗里达州狭长地带。影响湿地松生长的主要气候因子是年平均气温、 1月平均温度和年降雨量。
In 1983, 47 species of Pinus iliattii provenance from eight states of the United States were introduced to the Nanning Regional Forestry Science Institute in 1984. It was compared with the Pinus elliottii seedlings in Taishan, Guangdong Province, Pinus faecium and Pinus massoniana in Anhui Province. Randomized block design was repeated 4 or 5 times. The results showed that the growth of Pinus elliottii was significantly different, the variation of its growth traits was geographically gradual, while the variation of other traits was random. Good provenance is mainly distributed in the United States, Louisiana to Florida strip. The main climatic factors that affect the growth of Pinus elliottii are annual mean temperature, January average temperature and annual rainfall.