西安吴家坟秋季土壤的碳释放规律研究

On changeable laws of release volume of CO_2 from soil in Wujiafen of Xi′an area in autumn

通过对西安吴家坟秋季土壤CO2 释放量的监测 ,研究了影响土壤CO2 释放量变化的主要因素及在不同温度、湿度条件作用下 ,土壤CO2 释放量变化的特点 .总结出西安南郊地区秋季土壤CO2 释放量的变化主要随着温度而变化 ,即气温降低 ,土壤CO2 释放量逐渐减少 .在昼夜时段中 ,土壤CO2 释放量也随温度变化 ,但相比温度变化有明显的滞后 ,大约滞后 6h 。

Covering soil land is the biggest Carbon pool on the earth surface. By surveying the release volume of CO 2 from soil in Xi′an area in autumn, this paper analyzes the main factors which have influence on release volume of CO 2 from soil in different temperature and moisture and its changeable characteristics. The changeable laws of release volume of CO 2 from soil in Xi′an area in autumn are presented. In the end, this paper points out that surveying the volume of CO 2 from soil provides the basis for solving the problem on Carbon pool.