中国泥炭地有机碳储量与储存特征分析

根据全国泥炭资源调查的结果, 运用有机质含量、干容重、泥炭储量、泥炭地面积等数据估算中国泥炭地有机碳储量,并探讨其碳储存特征.结果表明,我国泥炭地有机碳总储量约15.03亿t.在各省和各气候区分布不均匀,四川省(6.45亿t)和云南省(2.91亿t)泥炭地有机碳储量最丰富,占总储量的62.29%.各气候区中高原湿润区泥炭地有机碳储量最大(7.14亿t),特别是若尔盖高原泥炭地有机碳储量(6.30亿t)占总储量的41.92%.我国泥炭地有机碳密度一般在80~140kg/m3, 最大值为270~360kg/m3,最小值小于80kg/m3,其分布以燕山、太行山至横断山为界,西北部低,东南部高.泥炭地单位面积有机碳储量均值为143.97kg/m2,滇南高原最高,达到637.06kg/m2.区域平均泥炭地有机碳积累强度为208.23 t/km2,若尔盖高原最高达3972.71t/km2.

Analysis of organic carbon storage and characteristics of China's peatlands

Based on the result of the national survey of peat resources, the data of organic matter content, volume weight, peat reserves and peatland area were used to estimate organic carbon storage and discuss characteristics of China’s peatlands. The total organic carbon storage (OCS) of China’s peatlands, including bare peatlands and buried peatlands, were 1.503 billion tons, unevenly distributed over 31 provinces and 16 climatic zones. Peatland OCS (POCS) in Sichuan (645 million tons) and Yunnan Provinces (291 million tons) was the largest, accounting for 62.29% of the total POCS. Plateau humid zone had the largest POCS of 714 million tons, especially in Zoige Plateau, where POCS was 630 million tons, accounting for 41.92% of the total POCS. The organic carbon density (OCD) of China’s peatlands was generaly between 80kg/m3 and 140kg/m3, and the range of the maximum was 270~360 kg/m3, and the minimum was less than 80kg/m3. Divided by Yan Mountain, Taihang Mountain and Hengduan Mountain, peatland OCD was lower on the northwestern side than that on the southeastern side. The average OCS per unit peatland area averagely was 143.97kg/m2, and that in the south of Yunnan Plateau was 637.06kg/m2. The average regional organic carbon intensity of peatlands averagely was 208.23t/km2,and that in Zoige Plateau (3972.71t/km2) was the largest.