高寒草甸能量动态系统模型的灵敏度分析

青藏高原上大面积的高寒草甸是中国植被的特点。高寒草甸放牧生态系统在我国自然生态系统中占有重要的位置。利用本文作者建立的高寒草甸放牧生态系统模拟模型，ＧＭＡＭＥ１，模拟了高寒草甸放牧生态系统夏秋草场在临界放牧压力下的２７０种轮牧制度；研究高寒草甸放牧生态系统的潜在生产力等。对高寒草甸能量动态系统模型（ＧＭＡＭＥ１）的灵敏度进行分析，输入扰动是通过在计算机程序里增加或降低２０％第１１天的各分室生物量值来进行。参数扰动是通过在模拟１００ｄ和１８２ｄ中变动２０％的温度和太阳辐射强度来进行的。结果表明：高寒草甸能量动态系统模型容易受放牧采食的影响，而不易受温度和太阳辐射强度的影响。

Sensitivity analysis of alpine meadow energy dynamic system

The great alpine meadow on the Qinghai Tibet Plateau is the characteristics of Chinese vegetation. A compartment model of an alpine meadow grazing ecosystem was simutaled by structuring an experiment system, Grazing Manager of Alpine Meadow Ecosystem 1 (GMAME1), to study alpine meadow pastures of Qinghai province in China, analyse field rotation grazing experiments, simulate and analyse 270 rotation grazing systems, and study the alpine meadow potential productivity under grazing pressure. Sensitivty analysis was applied to alpine meadow energy dynamic system. Input disturbance has been done by increasing or decreasing 20 percent of every department values on 11th day in computer program. Parameters disturbances were performed by increasing or decreasing 20 percent of temperature and global solar energy in every day of 182 simulation days. The results show that the system on July 10 (t=100d) would be more stable than the system on October 1 (t=182d), and is not disturbed easily by the environment temperature and global solar energy.