【摘要】 根据大量实测的土壤碳密度资料并结合生产力模型 ,得到一组直接利用气候资料来计算平均土壤呼吸速率和土壤碳密度的公式 ,并同实测资料进行了对比 .根据此模型的模拟结果 ,对最近基于观测资料而得出的平均土壤呼吸速率对温度变化的响应并不显著的结论提出了质疑 .利用此模型还对全球潜在的土壤碳密度分布做了模拟 ,计算出全球土壤碳库为1 1 5 2Pg .该模型成功地模拟了土壤碳密度随降水 (或湿度 )状况而变化的特征 .更多还原

【Abstract】 Based on observed soil carbon density data over wold wide and model results of net primary production, a simple model was built that can be used directly in calculating average soil respiration rate and soil carbon density. The simulated results have been compared with measurements. According to our model results, the recently view that averaged soil respiration rate does not vary with temperature is under debatable. Using this model, we simulate the distribution of potential soil carbon density on global scale,the calculated global soil organic carbon pool is 1152 Pg. This simple model can successfully simulate the large differences of soil carbon density at different precipitation (or soil moisture) situations.更多还原