摘要
1985～1987年,在广西龙桥林区,对杉木、马尾松人工纯林和柠檬桉与马尾松人工混交林,以及天然灌木草本群落4种不同植被类型对降水的截留、地表径流及调蓄功能等水文效益进行测定,结果表明,对降水的截留效果以马尾松林为最好,混交林次之,杉木林较差,在同一植被类型的不同层次,以乔木层的截留量占绝对优势;对减少地表径流和延缓洪峰的效果,以层次结构较为复杂的混交林最佳。在同一植被类型内部结构特征的诸因子中,活地被物层的总盖度和草本层的生物量,是影响地表径流的主导因子:植被土壤对降水的调蓄功能,以混交林为最好。其他3种植被类型差异不大。说明在山地防护林建设中,营造针阔叶混交林,使其形成复层林,并保护好灌木草本层和死地被物层,对增强森林的调蓄能力具有重要的意义。
Hydrologic benefits of the rainfall interception, surface runoff and function of regulation and storage were studied in 4 vegetation types of the Chinese fir plantation, the masson pine plantation, the mixed forest of Eucalyptus citriodora-masson pine and the natural shrub-herbage community in Lonqiao forest district, Guangxi over the period from 1985 to 1987. Results indicate that the greatest effect of interception by the forest has been found in the masson pine forest, moderate in the mixed forest, and the least in the Chinese fir forest. In different layers with in the same vegetation type the tree layer has absolute preponderance in interception storage. The mixed forest with more complex structurehas the greatest capability of reducing the surface runoff and delaying the flood peak. Among the factors of internal structural characteristics in the same vegetation type, the total coverage of the living ground layer and the biomass of the herbaceous layer are the leading ones affecting the surface runoff. The mixed forest is the best in the function of the precipitation regulation and storage of vegetation soil, while the other three types show little difference. In the construction of the mountain shelter forest it is of great importance to strengthen the capacity of regulation and storage of the forest by the establishment of the theropencedrymion which will become a multi-storied forest and by the protection of the shrub-herbage and dead ground layers.
出处
《中南林学院学报》
CSCD
1991年第1期25-34,共10页
Journal of Central South Forestry University
关键词
林冠截留
人工林系统
水文效益
Guangxi, plantation system, hydrologic benefit, crown interception, function of regulation and storage
