4个杉木品系在广东省天井山林场的生长比较

文章测量了杉木(Cunninghamia lanceolata)4个品系树高、地径、冠幅、高径比和最大净光合作用速率,比较了不同品系苗木在造林2 a后的存活与生长表现.结果表明,GLS-1和YL-061的保存率较高,依次为GLS-4和YL-020;杉木苗品系之间的生长表现、光合能力与保存率均表现出相同的趋势,为GLS-1苗木生长最好,YL-061次之,YL-020和GLS-4生长相近且低于前两个品系;各品系之间的高径比没有显著差异.造林2 a的初步结果表明,GLS-1和YL-061可以作为附近区域杉木人工林造林的候选品种.

The Comparison of Growth Performance of Four Provenances Cunninghamia lanceolata in Guangdong Tianjingshan Forest Farm

The survival rate and growth performance of seedlings of different provenances of Cunninghamialanceolata were compared after afforestation for two years. And the seedling height, ground diameter, crowndimeter, height-dimeter ratio, and maximum net photosynthetic rate of four provenances of C. lanceolata weremeasured. The results showed that the survival rate of GLS-1 and YL-061 were higher, followed by GLS-4 andYL-020. The provenances of C. lanceolate showed the same trend in growth performance, photosynthesis abilityand survival rate. The growth of GLS-1 seedlings was the best, YL-061 followed, YL-020 and GLS-4 were similarand lower than the first two provenances. There was no significant difference in the height-dimeter ratio of theperformances. The preliminary results of two years afforestation showed that GLS-1 and YL-061 could be servedas the candidate provenances for C. lanceolata afforestation in the surrounding areas.