5个黑木相思无性系在肇庆地区的早期生长表现

Early Growth Performance of Five Acacia melanoxylon Clones in Zhaoqing Area

选取黑木相思Acacia melanoxylon无性系SR3、SR14、SR17、SR20、SR21为研究对象,对其早期生长进行分析。研究结果表明,在树高生长方面,5个黑木相思无性系在封开以SR17的树高生长最高,平均高度超过3.00 m;在怀集以SR20、SR21的树高生长最大,平均高度分别为1.36 m、1.15m。在地径生长方面,在封开以SR17的地径生长最高,平均地径达6.26 cm;怀集的黑木相思地径主要分布于1.15~1.82 cm。封开地区以SR17的公顷蓄积量明显高于其它4个黑木相思无性系;而在怀集地区SR14、SR17的公顷蓄积量要低于其它3个黑木相思无性系。综合各项指标,黑木相思无性系SR17更适宜在封开生长,SR20、SR21更适合在怀集生长。

Exploring the early growth performance of different Acacia melanoxylon clones in the Zhaoqing area is of great significance to promote the restoration of low-efficiency forests and optimizing the structure of regional tree species. In this study, A.melanoxylon clones SR3, SR14, SR17, SR20, and SR21 were selected as the research objects to analyze their early growth status. The results showed that in terms of tree height growth.The SR17 had the highest tree height growth among the five A. melanoxylon clones, with an average height of more than 3.00 m. In Huaiji, SR20 and SR21 had the highest tree height growth, with an average height of 1.36m and 1.15 m, respectively. In terms of ground diameter growth, SR17 had the highest ground diameter growth in sealing, with an average ground diameter of 6.26 cm. the ground diameter of A. melanoxylon in Huaiji is mainly distributed in 1.15-1.82 cm. In terms of hectare stock volume, the hectare stock volume of SR17 in the Fengkai area was significantly higher than that of the other four A.melanoxylon clones. The stock volume of SR14 and SR17 were lower than the other three clones in the Huaiji area. According to the comprehensive indexes, the clone SR17 of A. melanoxylon was more suitable for growth in Fengkai. SR20 and SR21 were more suitable for growth in Huaiji.