【作者】 孙政国； 刘信宝； 沈益新； 李建龙；

【Author】 SUN Zheng-guo;LIU Xin-bao;SHEN Yin-xin;LI Jian-long;College of Prataculture Science, Nanjing Agricultural University;School of Life Science, Nanjing University, Nanjing University;

【机构】 南京农业大学草业学院； 南京大学生命科学学院；

【摘要】 本文通过卫星遥感参数建模的方法,对我国南方地区草地生态系统植被碳储量进行了估算,主要研究结果如下:根据IGBP的土地覆盖分类方案,估算出研究区草地面积为729136km²,其中面积最大的是多树草原,面积为390371km2,占53.54%,其次是典型草地（38.90%）,其它依次是湿地草地、稀疏灌丛和稀树草原,分别占总面积的3.96%、2.16%和1.45%;通过模型估算的南方各类型草地的生物量碳密度分别为198.87、244.35、237.72、174.60、178.57g Cm^-2;总碳储量为155.69TgC,其中稀疏灌丛生物量碳储量为3.13TgC,占总碳储量的2.01%;多树草原生物量碳储量为95.39TgC,占61.27%;稀树草原为2.51TgC,占1.61%;典型草地为49.52TgC,占27.41%;湿地草地为5.15TgC,占2.80%。以上研究在一定程度上加强了南方草地碳储量研究的薄弱领域,为全球气候谈判进一步提供了支撑数据。更多还原

【Abstract】 The carbon storage of different types of grasslands in the southern China from the year 2001 to 2010 was estimated by using a remote sensing parameter model. The grasslands of the study area may be classified into five types based on land cover and classification scheme proposed by International Geosphere-Biosphere Programme（IGBP）, namely open shrubs, woods savanna, savanna, typical grasslands and permanent wetlands. It showed that the total area of southern China’s grasslands was 729136km², and open shrubs accounted for 2.16%, woods savanna accounted for 53.54%, savanna accounted for 1.45%, typical grasslands accounted for 38.90%, permanent wetlands accounted for 3.96%. The intensity of biomass carbon of different types of grasslands in the southern China was analyzed that the carbon intensity of woods savanna was maximum(244.35 g Cm^-2), and followed by savanna, open shrubs, and permanent wetlands, the value was 237.72, 198.87 and 178.57, respectively. The carbon intensity of typical grasslands was minimum（174.60 g C m-2）. The total carbon storage of the southern China was 155.69 TgC, of which open shrubs accounted for 2.01%（3.13 TgC）, woods savanna accounted for 61.27%（95.39 TgC）, savanna accounted for 1.61%（2.51 TgC）, typical grasslands accounted for 27.41%（49.52 TgC）, permanent wetlands accounted for 2.80%（5.15 TgC）. It just fills up the vacancy of relative research on carbon storage of grasslands ecosystem in the southern China, and provides the reliable bases for the database of carbon sink.更多还原