黄土高原地区土地植被承载力与植被生态恢复建设

Vegetation Carrying Capacity of Land and Vegetation Restoration and Construction in the Loess Plateau Region

土地植被承载力是黄土高原地区土壤水分与植物生长关系调控、合理利用水土资源和生态植被建设的核心问题之一。分析了土地植被承载力对植被结构的影响,认为在大气降雨量为唯一土壤水分输入量的黄土高原,土地植被承载力决定了植物群落密度,直接影响植被结构。从植被地带和群落适应性原理、缓解土壤干旱、控制植被生产力三个方面探讨了生态恢复与土地植被承载力的相互关系,并提出了黄土高原生态恢复建设必须优先考虑土地植被承载力,根据土地植被承载力进行植被生态恢复建设是黄土高原生态环境得以改善和持续发展的必由之路。

Vegetation carrying capacity of land （VCCL） is a key index for rational utilization of soil water and vegetation resource in the Loess Plateau region. Based on the analysis on the relationship between the VCCL and the vegetation structure, it was thought that the density of the vegetation community was decided by VCCL, and the vegetation structure in this region was mostly affected by VCCL. The relationship including the between VCCL and vegetation restoration and conctruction was analyzed from three aspects principle of vegetation zone and community ; the limit of soil arid layer and the production control of a vegetation community. It was put forward that VCCL should be firstly considered in vegetation restoration and construction in the Loess Plateau. VCCL based on vegetation restoration and construction is the only way to maintain ecological environment and sustainable development in Loess Plateau region.