4个杉木品系在广东省天井山林场的生长比较

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

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