摘要
采用最新的土壤温室气体通量监测系统,对人工草地春季土壤CO_2和CH_4通量进行测定,研究植物复苏期人工草地土壤CO_2和CH_4通量的日变化及其与环境因素的关系。结果表明:春季人工草地土壤CO_2通量有明显日变化特征,通量变化范围为-6.47~3.75μmol/(m^2·s),最大值出现在10∶00~12∶00之间,最小值出现在16∶00~17∶00之间,土壤5 cm温度是草地土壤CO_2通量日变化的主要影响因子;人工草地CH_4通量也有明显的昼夜变化规律,白天的波动性要大于夜晚,全天的波动范围为-16.31~13.13nmol/(m^2·s),在16∶00~18∶00之间出现最大值,在10∶00~11∶00之间降到最小值,土壤10 cm温度是草地土壤CH_4通量的主要影响因子。
The soil CO_2 and CH_4fluxes were measured monthly in artificial grassland in spring in 2015 using an Ultraportable Greenhouse Gas Analyzer（ 951- 0011,LGR Inc.,USA） and SF- 3000 soil flux system equipped with the four soil flux chamber. The relationships of soil CO_2 and CH_4fluxes with environmental factors were also studied. The results showed that the soil CO_2 flux exhibited an apparent diurnal variation. Its value was between- 6. 47 and 3. 75 μmol/（ m^2·s）,and the peak value and valley value appeared at 10∶ 00 ~12∶ 00 and 16∶ 00 ~ 17∶ 00. It was mainly influenced by 5- cm soil temperature. The soil CH_4 flux also had obvious day and night law. The volatility in daytime was bigger than that in nighttime. The CH_4 flux values ranged from- 16. 31 to 13. 13 nmol/（ m^2·s）,and the peak value and valley value appeared at 16∶ 00 ~18∶ 00 and 10∶ 00 ~ 11∶ 00. The 10- cm soil temperature was its main influence factor.
出处
《山东农业科学》
2016年第7期91-94,共4页
Shandong Agricultural Sciences
基金
国家自然科学基金资助项目(41271510)
中央高校基本科研业务费项目(GK201601009)
