中国喀斯特高原山地区抗冻耐旱型植被退化现状及恢复对策

文中提出抗冻耐旱型植被退化特征为次生林比例大、林分结构缺失及缺陷、种间竞争激烈且优势树种功能未充分发挥、树种选育缺乏适应性评价，恢复策略包括恢复生态经济型植被、调整林分树种组成与密度、修复水平与垂直层次的结构缺陷、合理划分功能区以实行分区保护和改变农村能源结构。喀斯特高原山地区抗冻耐旱型植被恢复的基础研究工作尚处于起步阶段。为提高抗冻耐旱型植被的适应与恢复能力，未来需要加强植被适应性修复、树种选择与配置以及水肥管理与土壤培肥改良3个科学问题与关键技术的研究。

Degradation Situation and Restoration Countermeasures of Frost Resistant and Drought Tolerant Vegetation in Karst Plateau Mountain Area, China

The paper pointed out that the frost resistant and drought tolerant vegetation shows the following degradation characteristics as a large proportion of secondary forest, lacking or even defects in forest structure, fierce competition between species, failure of dominant species to give play to its function and lacking of adaptability evaluation in species selection, the restoration countermeasures include the restoration of ecological and economic types of vegetation, adjustment of the species composition and density in stands, repairment of horizontal and vertical structural defects, implementation of the division of functional areas to protect and transformation of the rural energy structure. The basic research on frost resistant and drought tolerant vegetation in Karst plateau mountain area falls in the initial stage. In order to improve the adaptation and recovery capacity of frost and drought tolerant vegetation, the research on the following three scientific issues and key technologies should be strengthened, i.e., adaptive rehabilitation of vegetation, tree species selection and allocation, water and fertilizer management and soil fertility improvement.