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采用广东、湖南和贵州 3个省 4 0个杉木优良无性系 ,于 1998年在广东大坑山林场进行区域化试验。结果表明 :6年生单株材积生长 5 5 %的无性系优于对照 ,其中达较显著差异水平以上的有 4个无性系 ,广东 3个 ,湖南 1个。广东提供的无性系表现较好 ,其中生长表现较优的GDL0 4 1、GDL0 4 3、GDL0 4 4三个无性系单株材积达较显著差异水平以上 ,占参试无性系的 33% ,其次为GDL0 4 2、GDL0 4 6无性系 ,其单株材积增益均达 2 5 .1%以上 ,在本省亦经过了 3次以上重复试验 ,表现均较优 ,可大面积在广东造林推广应用。
Using 40 fine clones of cunninghamia lanceolata from three provinces of Guangdong, Hunan and Guizhou provinces, the regional experiment was conducted in 1998 in Taikengshan Forest Farm, Guangdong Province. The results showed that clones with 5 5% volume growth per 6-year-old were better than the control, including 4 clones with significant difference above that level, 3 in Guangdong and 1 in Hunan. The clones provided by Guangdong performed well, and the volume of three GDL0 4 1, GDL0 4 3 and GDL0 4 4 clones with better growth performance was more than the significant difference, accounting for 33% of the clones tested, followed by For GDL0 4 2, GDL0 4 6 clones, the volume gain per plant reached more than 25.1%, in the province has also been more than 3 times repeated tests, the performance is better, can be widely applied in afforestation in Guangdong.