杉木地理种源群体间存在着明显的性状变异.利用变异,选择出广西融水、湖南江华、贵州锦屏、广东乐昌、江西全南、湖南会同等优良种源.这些种源遗传改良效果显著,可使苏南低山丘陵地区杉木林蓄积量增加20%以上.因此,认为广西融水、湖南江华、贵州锦屏等种源可作为优良种源在林业生产上推广应用;广西贺县、广西浦北、广东信宜、江西铜鼓等初期生长快,但对结实量多的种源,可用于短轮伐小径材、椽材作业,以发掘利用其早期的增产潜力. Cunninghamia lanceolata, Geographical provenance of Cunninghamia lanceolata, Cunninghamia lanceolata, Cunninghamia lanceolata, Cunninghamia lanceolata, Cunninghamia lanceolata, Cunninghamia lanceolata, Cunninghamia lanceolata, Cunninghamia lanceolata, Cunninghamia lanceolata Significantly, the accumulation of Cunninghamia lanceolata forest in the hilly area of ​​southern Jiangsu was increased by more than 20%, so it could be concluded that Guangxi Rongshui, Hunan Jianghua and Guizhou Jinping could be popularized and used as superior provenances in forestry production. Guangxi Hexian , Guangxi Pubei, Guangdong Xinyi, Jiangxi Tonggu and other initial growth fast, but the provenance of provenances, can be used for short-rotating small-diameter timber, rafter work, to explore the use of its early production potential.