相思树种在沿海沙地不同立地环境中的应用效果

Applying Effects of Acacia Tree Species in Different Coastal Sandy Sites

通过测定生长量和抗风性能等指标,研究了厚荚相思、马占相思、大叶相思、纹荚相思等树种在沿海后沿沙地、木麻黄基干林带采伐迹地、风口困难立地等不同立地环境中的应用效果。结果表明:厚荚相思、纹荚相思和马占相思等3个树种为适宜在沿海后沿沙地上生长的相思树种,它们的树高年平均生长量大于1.0 m.a-1,胸径年平均生长量大于1.0 cm.a-1;厚荚相思生长快,林分郁闭早,抗风能力强,具有较强的固氮能力,是一个基干林带更新较为理想的树种;厚荚相思对沙荒风口大风、流沙和严重干旱等恶劣生境适应性较强,生长最大,是风口困难立地造林的可取树种。

The applying effect of Acacia crassicarpa , Acacia mangium, Acacia auriculiformis and Acacia aulacocarpa in different sandy sites was studied by testing their growth increment and wind resistance. The results showed that Acacia crassicarpa, Acacia aulacocarpa and Acacia mangium, whose mean average height was more than 1.0 m · a ^-1 and mean average DBH was more than 1.0 cm · a^-1, could adapt the environment of coastal sandy site. Acacia crassicarpa was the good tree species on cutting blank of shelterbelt because it grew fast, reached higher canopy early, had the better wind resistance and higher adaptive tree species on opened, windy, draught sandy site for its better resistance to wind, shifting sands and serious drought.