Under the principle of sustainable development, this paper analyzes the factors influencing the competitive powerof scenic spots, and sets up a set of evaluation index system, which considers environmental, ecological...Under the principle of sustainable development, this paper analyzes the factors influencing the competitive powerof scenic spots, and sets up a set of evaluation index system, which considers environmental, ecological, social and economicbenefits. According to the characteristic of the index system, the principal component analysis is adopted to do comprehensiveappraisal. In the case study, this paper analyzes the competitiveness of scenic spots in Jiangsu province.展开更多
树木之间的竞争关系是塑造森林结构和动态的关键因素。采用Hegyi单木竞争指数,定量分析了青秀山次生林优势种大叶栎Castanopsis fi ssa种内与种间的竞争关系。结果表明:1)大叶栎种内竞争强度随着胸径的增大而逐渐减小,这与种内的密度制...树木之间的竞争关系是塑造森林结构和动态的关键因素。采用Hegyi单木竞争指数,定量分析了青秀山次生林优势种大叶栎Castanopsis fi ssa种内与种间的竞争关系。结果表明:1)大叶栎种内竞争强度随着胸径的增大而逐渐减小,这与种内的密度制约性的自疏效应有关。2)大叶栎与乔木上层建群种马尾松Pinus massoniana的竞争最为强烈,其次为大叶栎、稠木Lithocarpus glabra、阴香Cinnamomum burmannii等树种。大叶栎种间竞争较种内竞争更为剧烈,竞争的结果可能会导致马尾松种群逐渐退出群落。3)大叶栎种内以及与整个林分的竞争强度与对象木胸径之间近似服从幂函数关系,而大叶栎与伴生树种的竞争强度与其胸径间近似服从对数函数关系,竞争强度和对象木胸径间呈显著的负相关关系。大叶栎种内和种间的竞争强度随大叶栎树龄的增大而减小,当其胸径超过30 cm后,种内和种间竞争强度的变化很小。展开更多
基金Supported by the project(04EYB018)of the philosophical and social science research in the tenth five-year program of Jiangsu province,and the university philosophical and social science project(04SJD790020)of the Education Department of Jiangsu province.
文摘Under the principle of sustainable development, this paper analyzes the factors influencing the competitive powerof scenic spots, and sets up a set of evaluation index system, which considers environmental, ecological, social and economicbenefits. According to the characteristic of the index system, the principal component analysis is adopted to do comprehensiveappraisal. In the case study, this paper analyzes the competitiveness of scenic spots in Jiangsu province.
