滨海沙地引种相思类树种生长与生态效应分析

Growth and Ecological Effect of Introducing Acacia on Coastal Sand Land

针对福建沿海防护林树种匮乏的局面以及生态系统稳定性差等现状,开展沙质海岸引进相思类树种造林试验。结果表明:厚荚相思、马占相思和大叶相思在沿海恶劣环境下具有较高的生产力,3种相思类树种生物量分别比实生木麻黄增加了144.59%、111.31%和22.71%。厚荚相思、马占相思和大叶相思防护功能强,3种相思都具有较强的降风效能,林内相对风速分别下降了76.92%、73.08%和67.53%,而且这3种相思能改善土壤理化性质,提高土壤肥力。

In allusion to shortage protection forest species and poor ecosystem stability on coastal sand land in Fujian Prov. , experiments of introducing Acacia were conducted on sandy coast. The results show that Acacia crassicarpa, Acacia mangium ,Acacia auriculaeformis have higher production. Three kinds of Acacia increases 144.59%, 111.31% and 22.71% respectively. Protection function of Acacia crassicarpa , Acacia mangium. Acacia auriculaeformis is strong. All of the 3 species of Acacia have stronger windbreak. Relative wind speed decreases 76.92% ,73.08% and 67.53% respectively. These 3 species can improve the soil physicochemical properties and fertilities.