摘要
植被在固定CO2释放O2和大气与陆地生态系统间的碳循环中起着十分重要的作用,是区域和全球环境变化的主要反馈和调节系统,具有重要的生态功能,并体现出生态服务价值。根据青海省都兰县草地资源调查及相关资料,计算各种草地植被类型的净初级生长量,进而根据光合作用方程式、造林成本法、碳税法和工业制氧法估算其固定CO2和释放O2的物质量及其价值量。结果表明,都兰县草地植被年净初级生长量为364.04万t,固定CO2593.38万t/年,释放O2436.85万t/年。根据造林成本法和碳税法估算出都兰县植被固定CO2的价值为10.3385亿元/年;利用造林成本法和工业制氧法估算出释放O2的价值为16.4457亿元/年。都兰县草地植被固定CO2释放O2物质量和价值量中,干荒漠类草地贡献率最高,其次是高寒草原类、山地草原类、沼泽类和高寒草甸类。
Vegetation plays an important role in CO2 fixation,O2 release carbon circulation of atmosphere and land ecosystem.And it is the main feedback and regulation system and it has important ecological function and ecological service value.Based on the investigation on the grassland resources in Dulan County and the related materials,the net primary productivity of different grassland vegetation types was calculated.And the mass and values of CO2 fixation and O2 release were assessed according to equation of photosynthesis,reforestation cost method,method of carbon duty and industrial method of making O2.The results indicated that the annual net primary productivity of grassland vegetation in Dulan County was 364.04 ×104 t per year.The quantity of fixed CO2 and released O2 were 593.38×104 t per year and 436.85×104 t per year.Using reforestation cost method and carbon duty method,the value of CO2 fixation by vegetation in Dulan County was 10.338 5×108 yuan per year.Using reforestation cost method and industrial method of making O2,the value of released O2 was 16.445 7×108 yuan per year.Among the mass and value of CO2 fixation and O2 release of different grassland vegetation in Dulan County,the dry desert had the highest contribution rate,followed by alpine grassland,mountain grassland,swamp and alpine meadow.
出处
《畜牧与饲料科学》
2011年第6期24-26,共3页
Animal Husbandry and Feed Science
关键词
草地植被
固碳释氧
价值评估
都兰县
grassland vegetation
CO2 fixation and O2 release
value assessment
Dulan County
