粤东岩质海岸困难立地造林树种选择

选用大头茶（Gordonia axillaris）、大叶相思（Acacia auriculiformis）、台湾相思（A. confusa）、 小叶榕（Ficus concinna）和杨梅（Myrica rubra）等5 个树种，在粤东4 个区县的岩质海岸困难立地进行 造林试验。结果表明：种植后4 年，各树种平均保存率排序为：大头茶（90.1%）> 大叶相思（85.5%）> 台湾相思（84.5%）> 杨梅（76.7%）= 小叶榕（76.7%）。大叶相思生长最快，平均树高为1.84 m，平均地 径为4.03 cm，平均冠幅为1.35 m；大头茶、杨梅和台湾相思生长较快。这4 个树种是适宜粤东岩质海岸 困难立地造林的优良树种。小叶榕保存率低、生长慢、长势差，不适合作为粤东岩质海岸困难立地造林 的优选树种。

Tree Species Selection in Rocky Roast in the Eastern Guangdong

Based on the afforestation test that Gordonia axillaris, Acacia auriculiformis, A. confusa, Ficus concinna and Myrica rubra were transplanting in rocky roast in four districts in the east of Guangdong province after four years. The results showed that the order of each average survival rate of tree species was G. axillaris(90.1%) > A. auriculiformis(85.5%)> A. confusa(84.5%)> M. rubra (76.7%)= F. concinna (76.7%). A. auriculiformis grew most quickly. The average tree height was 1.84 m.The average round diameter was 4.03 cm. The average crown width was 1.35 m. G. axillaris, M. rubra and A. confusa grew relatively quickly. These four tree species are the superior tree species which are suitable for rocky coast in the east of Guangdong province. The survival rate of F. concinna is low, the growth is slow cnd poor, which is not suitable as a preferred tree for afforestation on rocky roast in eastern Guangdong.