摘要
为了探讨封山育林对林木生长的影响和封山育林后林分树种组成及林地土壤的变化,在4种不同封禁年限的林分内,分别设置样地和小样方进行调查和分析,结果表明:封山育林能保证幼树较高的成活率,显著提高林分的生长量;随着封山育林时间的延长,在乔木层和幼树层中,亚热带常绿阔叶树种种类和数量明显增加,物种多样性增加,林分的组成和结构朝着更稳定的方向发展, 森林的生态效益得到更充分的发挥;封山育林能明显改善林地土壤的物理性质,提高土壤中有机质、全N和速效K的含量,增加腐殖质层厚度,使土壤肥力得到提高。
In order to approach the effect of hill closing for forestation on forest growth and the change of forest component with tree species and forest soil after dosing.this research investigates and analyses some sample sites in 4 sorts of forest stands formed with different hill closing years. The results show as follows, hill Closing for forestation can ensure the survival rate of young trees living and increase the growing amount of forest stand remarkably. With the duration of hill closing extended, the sorts and quantity Of subtropical evergreen broadleaf tree species increase both in the forest canopy layer and in the young trees layer, the diversity of plants increases, the components of forest and the structure of forest trend become more steady and the forests give full play to its ecological benefits. Remarkably, hill closing for forestation can improve the physical properties of soil, increase its content of organic materials such as N and K and enhance the thickness of humus layer, thus improving the fertility of forest soil.
出处
《中南林学院学报》
CSCD
北大核心
2005年第5期28-32,共5页
Journal of Central South Forestry University
基金
国际林业研究中心(CIFOR)与加拿大国际发展研究中心(IDRC)资助项目
关键词
封山育林
林术生长
生态效益
物种多样性
演替
hill closing for forestation
forest growth
ecological benifits
diversity of plants
succession
