Carbon storage in grasslands of China
Carbon storage in grasslands of China
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DOI：
10.1006/jare.2001.0902
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发表时间：
2002-02-01
影响因子：
2.7
通讯作者：
Ni, J
中科院分区：
文献类型：
--
作者：
Ni, J
在1991年全国草地资源调查的基础上，采用碳密度法估算了中国草原的碳储量。基于中位数估算，中国草原植被、土壤和总碳储量分别为3-06、41.03和44,09 Pg C。植被碳储量低，大部分碳储存在土壤中。在四种类型的草地区中，高寒区（54.5%）和温带区（31.6%）占中国草地碳（植被和土壤）总量的85%以上。考虑到这两个区域的具体类型，高寒草甸（25.6%）、高寒草原（14.5%）和温带草原（11%）三种草地类型占中国草原碳储量的一半以上。总体而言，无论区域植被类型如何，草原（38.6%）和草甸（38.2%）占草地总碳的2/3以上。高寒草原的碳储量可能对全球碳循环具有显著和长期的影响。与以前的研究相比，这项研究估计植被中的碳储量更多，土壤中的碳储量更少。本研究与前两项研究的草地碳差异，可能是由于估算方法不同、草地分类体系不同、草原面积不同、碳密度不同四个原因造成的。中国草原面积仅占世界草地总面积的6-8%，碳排放总量占世界草地总量的9-16%。它们对世界碳储量做出了巨大贡献，并可能对全球和陆地上的碳循环产生重大影响。(C) 2002 Elsevier Science Ltd.
Carbon storage in grasslands of China was estimated by the carbon density method and based on a nationwide grassland resource survey finished by 1991. The grasslands in China were classified into 18 types, which are distributed mostly in the temperate region and on the Tibetan Plateau, and scattered in the warm-temperate and tropical regions. Based on the median estimate, vegetation, soil and total carbon storage of grasslands in China were 3-06,41.03 and 44,09 Pg C, respectively. Vegetation had low carbon storage and most carbon was stored in soils. Of the four types of regions that have grasslands, alpine region (54.5%) and temperate region (31.6%) hold more than 85% of the total grassland carbon (in both vegetation and soils) in China. Considering specific types within these two regions, three grassland types, alpine meadow (25.6%), alpine steppe (14.5%) and temperate steppe (11%) constituted more than half of all carbon stored in China's grasslands. In general and regardless of regional vegetation types, steppes (38.6%) and meadows (38.2%) made up more than 2/3 of total grassland carbon. The carbon storage in alpine grasslands may have a significant and long-lived effect on global C cycles. This study estimated more carbon storage in vegetation and less in soils than previous studies. The differences of grassland carbon between this study and two previous studies were due probably to four reasons, i.e. different estimation methods, different classification systems of grasslands, different areas of grasslands, and different carbon densities. China's grasslands cover only 6-8% of total world grassland area and have 9-16% of total carbon in die world grasslands. They make a big contribution to the world carbon storage and may have significant effects on carbon cycles, both in global and in and lands. (C) 2002 Elsevier Science Ltd.