霞浦沿海花岗岩侵蚀地引种相思类树种的试验研究

Experimental Study on the Introduction of Acacia on the Eroded Granite Hilly Land in Xiapu County

针对沿海花岗岩侵蚀地造林树种匮乏的局面以及生态系统稳定性差等现状,开展引进相思类树种造林试验。重点调查了不同相思树种在沿海花岗岩侵蚀地上的生长量和改良土壤效应,并应用统计学方法进行分析比较。试验结果表明,沿海花岗岩侵蚀地选择相思类树种造林能起到很好的水土保持作用,而且有助于改善造林地的土壤条件,提高林地肥力。引进相思类树种中以灰木相思的造林成效最好,纹荚相思次之,最后是卷荚相思。本研究为今后闽东沿海花岗岩侵蚀地的治理提供了重要的理论依据。

In accordance with the shortage of protective forest species and poor ecosystem stability on coastal granite eroded ground in Xiapu County, Fujian Province, forestation experiments on the introduction of Acacia were conducted in this study. The investigation in this paper focused on the growth capacity and improving effects of soil between different introducing Acacia trees grown on coastal eroded granite ground. The statistical methods were applied to analysis and compare the collected data. The Analysis results showed that planting Acacia on coastal eroded granite ground was not only instrumental in conserving soil and water, but also helpful to improvement of the soil conditions and soil fertility. In this study, the forestation effects of A. mplexa were the best, then that of A. aulacocarpa were the secondary with that of A. crassiearpa came the last. This study laid a theoretical foundation for the further management of coastal granite eroded ground in the east Fujian Province.