太行山石灰岩山地水土保持林立地类型的划分

利用２３６块野外标准地资料，运用数量化理论Ｉ及广义方差分析方法，研究了土层厚度，海拔、坡向为影响林木生长的主导立地因子。３个主导因子共构成６０个立地类型，参照石灰岩山地油松、侧柏、刺槐等树种立地划分研究结果。将６０个立地类型中的３５个划为适于用材林的立地类型。剩余２５个为水保林的立地类型。利用最优分割法。将２５个水保林立地类型划分为３个立地类型组。并对每个立地类型且的立地特点及生产力做了评价。

Classification of Site Types of Soil and Water Conservation Forest in Taihang Calcareous Mountain Areas

The division of site types were studied with data from 236 sample plots on forest of soil and water conservation in calcareous mountain areas, Shanxi province Soil depth, elevation and slop direction were decided as the main site factors of forest growth by using quantitative theory I and general diviation 60 combined sites were constituted by the main site factors, among which, 35 combined sites were classified as the sites suitable for timber forest by referring to classification of site types on the Chinese pine, oriental arborvitae and locust in the same areas, the remaining 25 sites as the sites of water and soil conservation forest The 25 combined site types were divided into 3 groups of site types using the optimization division method The characteristic and productive capacity of each group were appraised