南方人工造林的效益评价——以罗霄山区桂东县为例

Benefits of Evaluation on Artificial Forest in South China

以罗霄山区桂东县为例,针对目前南方的水土保持措施——退耕还林存在的问题进行了比较详细的分析。退耕还林能有效地减少水土流失,但人工林品种单一,景观结构简单,没有达到应有的水土保持和生态效果,缺少短期的经济效益,也使它很难持续存在。研究当地特点,种植适宜的乔木,注重林分多样性,并采取有效方法使乔木与草本植物共存,以达到水土保持效果与经济效益的有机结合,这是南方退耕还林时应注意的问题。

The problem of producing forest withdrawing from furrow, which is the main measurement of soil water conservation, is analyzed particularly as a sample at Guidong county in Luoxiao mountain area. The method of producing forest from furrow may reduce the soil erosion. But the variety of forest is singleness and cannot arrive the effect of soil and water conservation and the effect of zoology expected. It may be existed for long time due to the lack of short-term economic benefit. For the good effect of soil and water conservation and high economic benefit, the local environment must be studied, and the species must be chosen to make the arbor and herbage grow up together.