台湾桤木引种试验初报

台湾桤木在广东省内不同地点引种试验结果表明，东莞大岭山林场和佛山市林业科学研究所试验点的造林成活率和保存率均偏低，但生长性状表现较好，4．5年生时，平均树高分别为6．72m、7．69m，平均胸径分别为5．28cm、6．37cm。怀集大坑山林场和翁源九曲水林场两试验点的台湾桤木造林成活率较高，分别为84．67％和84．38％，1年8个月生的平均树高分别为2．99m和3．38m，平均地径分别为3．45cm和4．63cm。引种的台湾桤木形质性状表现优良，3．5年生时已能正常开花结实，幼林显示了一定的速生特性和适应性，但后期的生长状况及稳定性还有待进一步观测。

Preliminary Report on Introduction Experiment of Alnus formosana

Introduction experiment of Alnus formosana was carried out at various locations in guangdong. The results showed that the survival rate and the preservation rate of Alnus formosana were low in two points of Dalingshan state forest farm and Foshan Institute of Forestry Science, but its growth traits were good. When 4.5 years old, the average height was 6.72m, 7.69m, and DBH was 5.28cm, 6.37cm respectively. The survival rate of Alnus formosana was 84.67% and 84.38% in state forest farm of Dakengshan and Jiuqushui, respectively. And the average height was 2.99m, 3.38m, and the diameter of base was 3.45cm, 4.63cm, respectively, at 1 year and 8 months old. Alnus formosana has an excellent form quality, and it have been able to bear fruit normally at 3.5 years old. Young trees of Alnus formosana demonstrated good characteristics of fast-growing and adaptable, but the growth and stability need to be extended tested.