【摘要】 矮蒿草草甸是典型的高原地带性植被,也是青藏高原主要的放牧草地,其能量动态的模型化是研究因子相互作用、牧场管理、认识胁迫环境下亚系统行为的有效途径之一。本模型由5个分室组成:地上生活部分,地下活根,地下死根,地上枯枝落叶Ⅰ(易分解部分),地下枯枝落叶Ⅱ(不易分解部分)。5个分室之间的能量流用5个联立的微分方程描述,其中的参数全部来自野外实验工作。 计算结果表明,模型能够较好地描述矮蒿草草甸能量动态特性。此外,对封育条件下矮蒿草草甸4年能量动态进行了模拟。更多还原

【Abstract】 Kobresia humilis meadow is a typical highland vegetation and main pasture on the Qingzang plateau. The study of modelling of its energy dynamcs is significant to understand interactions between factors, pastural management and ecosystem behavior under stress. The model developed is composed of the following five compartments: above-ground plant portion, below-ground live portion including roots, below-ground dead portion including roots, above-ground litter I (perishable portion), and above-ground litter I (imperishable portion).Energy flows between the five compartments are described by five simultaneous differential equations and parameters in the model were all determined from field experiments.The simulation results exhibited satisfactory agreement with field data.In addition, four-year energy dynamics of Kobresia humilis meadow fenced were simulated.更多还原