草地不同深度土壤CO_2浓度变化特征研究  

Research on soil carbon dioxide density in different depths of the grassland

作　　者：张春林[1] 赵景波[1,2] 杨晓东 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062 [2]中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,陕西西安710075 [3]武警山西总队忻州支队,山西忻州034000

出　　处：《陕西师范大学学报（自然科学版）》2008年第6期90-95,共6页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(40571004)

摘　　要：利用红外CO2监测仪对西安市长安区不同深度草地土壤CO2浓度进行了连续观测,并结合同步气象资料,分析了不同深度土壤CO2浓度与温度和土层深度的关系,得出随着温度的升高,草地土壤CO2浓度增大,二者呈显著相关;草地土壤CO2浓度白天比夜间高;在1-4 m深度范围内,CO2浓度随土壤深度增加而增加.Using infrared carbon dioxide monitor, carbon dioxide density in different depths of the grassland soil of Chang＇an district, Xi＇an city was observed consecutively. The relationships between soil carbon dioxide, temperature and soil depth were analyzed based on the meteorological data. It showed that the soil carbon dioxide density increased with the temperature. There existed significant correlation between carbon dioxide density and temperature. As a whole, carbon dioxide density of grassland soil at day is higher than that at night. In the depths of 1-4 m,the carbon dioxide density increased with the soil depth.

关 键 词：CO2浓度 草地 影响因素 

分 类 号：S154[农业科学—土壤学]