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秦岭山系是我国南北气候的分界线,地理位置独特,对气候变化响应比较明显,气温升高会影响其土壤碳释放。因此对秦岭土壤CO2释放特征的研究具有重要意义。通过对秦岭主峰太白山六种不同植类型土壤CO2释放特征的野外测定,结果表明,太白山土壤CO2的释放从8:00-11:00升高,11:00-16:00达到峰值;土壤CO2的释放速率的大小顺序是:阔叶栎林>桦木林>落叶阔叶林>太白红杉林>秦岭冷杉林>高山草甸。不同植被类型土壤CO2的释放速率与温度呈正相关,与地表气温以及土层深度0～5cm处温度呈极显著正相关性。不同植被类型土壤CO2释放速率的Q10顺序是:秦岭冷杉林>桦木林>阔叶栎林>高山草甸>落叶阔叶林>太白红杉林。
The Qinling Mountains is the dividing line between the north and south climate in our country. It has unique geographical location and obvious response to the climate change. The rising temperature will affect the soil carbon release. Therefore, it is of great significance to study the characteristics of CO2 release in the Qinling Mountains. The results showed that the release of soil CO2 from the Taibai Mountain increased from 8: 00-11: 00 and reached the peak from 11:00 to 16: 00. Soil The order of CO2 release rate is: Quercus mongolica> Birch forest> Deciduous broad-leaved forest> Tailed Sequoia> Abies.> Abies alpine meadow. There was a positive correlation between CO2 release rate and soil temperature in different types of vegetation, and there was a significant positive correlation between surface soil temperature and soil temperature 0 ~ 5cm. The Q10 sequence of CO2 release rate in different vegetation types was: Abies firq.> Birchwood> Quercus mongolica> Alpine meadow> Deciduous broadleaved forest> Picea meyeri.