摘要
调查草毡寒冻雏形土生物量及土壤有机质,利用涡度相关技术观测该区域作用层与大气CO2通量.结果表明：地下90%生物量集中于0～10 cm的表土层,年总净初级生产量约935.0 g/m2;土壤有机质含量在6.401～7.060%之间;净CO2通量呈明显的日变化和季节变化规律;5月中旬到9月底为CO2的净吸收（780 g CO2/m2）,其中以7月最高,净吸收量明显高于非生长季的,10月到翌年5月初CO2的净排放量（383 g CO2/m2）;全年固定碳高达397 g/m2.
In Mat-Cryic Cambisols region, biomass of growing plants and soil organic matter （SOM） were invesgated, and eddy covariance of CO2 flux between vagetation and atmosphere was observed. The results suggested that 1） more than 90% of the underground biomass was concentrated in the soil layer of 0- 10 cm, annual net primary production was about 935.0 g/m^2; the content of SOM was ranged from 6. 401% to 7. 060%. 2） There was significant daily and seasonal variation in CO2 flux of alpine meadow ecosystem. As for seasonal dynamic, it is net CO2 influx （780 g CO2/m^2） from middle May to end of September, and monthly peak is July; net CO2 influx volume exceed net CO2 efflux （383 g CO2/m^2） from first October to May. Annual net CO2flux is 397 g/m^2.
出处
《草地学报》
CAS
CSCD
2006年第2期165-169,共5页
Acta Agrestia Sinica
基金
中国科学院知识创新工程重大项目(KZCX1-SW-01-01A)
国家重点基础研究发展规划项目(2002CB412501)
中日合作"以21世纪亚洲陆地生态系统碳管理为目标的综合碳收支研究"
中日合作"亚太地区环境创新战略计划(APESS)"
