作　　者： ; ; ;

机构地区： 广东海洋大学

出　　处： 《生态环境》 2006年第3期594-597,共4页

摘　　要： 植被在固定CO2释放O2和大气与陆地生态系统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,体现出生态服务价值。根据三江源区多次科考调查及相关资料,计算各种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:三江源区植被年净初级生长量为8.67×107t·a-1,固定CO21.41×108t·a-1,释放O21.04×108t·a-1。根据造林成本法和碳税法估算出三江源区植被固定CO2的价值为2.8926×1010元·a-1。利用造林成本法和工业制氧法估算出释放O2的价值为3.9157×1010元·a-1。三江源区植被固定CO2释放O2物质量和价值量中,草甸贡献率最高,其次是落叶灌丛、沼泽和草原。本研究对地处青藏高原腹地、生态系统脆弱且空气稀薄的江河源区的生态系统结构和功能的研究具有重要意义。 Vegetation Ecosystem is very important in CO2 Fixation, O2 Release and carbon circulation of atmosphere and land ecosystem and it has important ecological function and Value.Net primary productivity of vegetation is calculated according to investigation in Sanjiangyuan region. Based on net primary productivity, using equation of photosynthesis, reforestation cost, method of carbon duty and industrial method of making O2, the value of CO2 fixation and O2 release by vegetation ecosystem in Sanjiangyuan region can be estimated.The results are as follows： net primary productivity of vegetation is 8.67×10^7t·a^-1. The total CO2 fixation and O2 release is 1.41×10^8t·a^-1, 1.04×10^8t·a^-1 and the value of them is 2.892 6×10^10, 3.915 7×10^10 RMB yuan·a^-1, respectively. The meadow has the highest contribution rate and the second is defoliation shrub, swamp and grassland.This study is important for protecting structure and functions of vegetation in Sanjiangyuan region that is fragile, air-thin, situated in the Tibetan Plateau.

关 键 词： 三江源区 植被固碳释氧 价值评估

领　　域： [生物学] [环境科学与工程]