相思树种在沿海沙质立地环境中的抗逆性研究

应用大叶相思、肯氏相思、毛娟相思、马占相思和厚荚相思等相思树种在东山县沿海沙地上营建防护林,并对其抗风、抗台风及抗连续干旱性能进行了测定。结果表明:厚荚相思抗风能力强,生长快,是较好的可在沿海沙地上适生的树种;相思树种抗台风能力较木麻黄弱,台风对相思树种的主要危害是断梢,但在以后的生长中能较快地得到恢复,对相思林分生长并不会产生大的影响;厚荚相思在沿海沙地上造林,不仅成活率高(95%以上),而且在遭受连续8个月的干旱后,旱死率为0,表现出很强的抗旱能力,而且在贫瘠的沙地土壤上生长表现良好,其生长量超过了木麻黄601无性系,是非常好的适合于沿海沙地条件的树种。

The Study on Stress Resistance of Acacia Tree Species in Coastal Sandy Site

The protection forests were built with five Acacia tree species on coastal sandy soil in Dongshuan County, and their wind-resistance and drought-resistance was tested also. The results showed that Acacia crassicarpa had the highest ability on windresistance and grew fast too. It was suitable for coastal sandy site. The ability of typhoon-resistance of Acacia tree species was lower than that of Casuarina tree species. Typhoon mainly damaged their branches; however, this did not cause the obvious effect on growth because they would recovery from the damage soon. Acacia crassicarpa showed great ability on drought-resistance on sandy soil because only 10 % of trees died when they encountered 8 months long drought. Moreover, Acacia crassicarpa grew well on poor sandy soil. Its growth increment was more than that of Casuarina 601 clones on this site. Therefore, Acacia crassicarpa was a suitable tree species on coastal sandy site.