东灵山地区落叶阔叶林长期动态的模拟

用林窗模型研究了暖温带辽东栎林的长期动态变化。用森林经营历史和实际调查数据求得模型的参数。经过与实际数据检验证明所得模型能合理地预测辽东栎林的物种组成动态变化。通过对辽东栎交生裸地的模拟,可以得到：辽东栎种群在森林动态变化过程中呈现波动的形式,波动的周期为１１０ａ左右,叶面积指数的动态变化过程与林分的竞争状况有密切的关系,生产力的变化有着明显的无规律性,变化极水稳定,在３０ａ进有一个变化的高峰期,

SIMULATION MODELLING OF DECIDUOUS BROAD-LEAVED FOREST AT DONGLINGSHAN MOUNTAIN AREAS

The "Gap model" method was applied in a study of the long-term dynamics of Quercus liaotungensis forest in a warm temperate area of North China. Parameters were derived from a combination of the known history of forest management and observed data. The model was then tested on a set of observed data. It was found to reasonably simulate forest composition and biomass. Modeling the dynamics of Q. liaotungensis forests showed the following: 1) The pattern of biomass dynamics was cyclical, with a period of 110 years; 2) Variation in leaf area index (LAI) in the modeled forest was closely related to its competitive status; 3) Variation in net production was unregulated and extremely unstable, with a peak at 30 years. These are closely comparable to results from similar studies in other regions of the world.