摘要
为了精确估算泥炭地生态系统碳储量,采用土壤剖面法和植被收割法,研究了青藏高原东部边缘的若尔盖3种水位状态下的泥炭地植被碳储量、土壤碳储量(0~200 cm)和生态系统碳储量。结果表明:若尔盖高原3种水位状态下泥炭地生态系统碳储量为761.56~1103.40 t·hm^(-2),平均值为976.49 t·hm^(-2);植被碳储量为13.44~15.23 t·hm^(-2),平均值为14.53 t·hm^(-2);土壤有机碳储量为748.12~1088.17 t·hm^(-2),平均值961.96 t·hm^(-2),是中国湿地土壤有机碳储量的3倍、森林土壤有机碳储量的5倍和草地土壤有机碳储量的11倍。影响泥炭地碳储量估算不确定性的因子主要为泥炭深度、土壤容重和土壤有机碳含量,加强这3种土壤因子数据信息的研究有助于精确估算若尔盖高原泥炭地生态系统碳储量。
The objective of this study was to assess carbon storage of peatland ecosystems in Zoige Plateau of Qinghai -Tibetan Plateau, China. We selected three sites with different water levels and established a 1·hm^-2 peatland plot in each site. The soil profile method and vegetation harvest method were used, and then vegetation biomass, carbon concentration in both vegetation and soil, and soil bulk density from the three sites were analyzed. The results showed that the ecosys- tem carbon storage in the three study sites of the Zoige Plateau ranged from 761.56 to 1103.40 t ·hm^-2, with an average value of 976.49 t ·hm^-2. The vegetation carbon storage ranged from 13.44 to 15.23 t ·hm^-2, with an average value of 14.53 t ·hm^-2. The soil organic carbon storage （0-200 em） ranged from 748.12 to 1088.17 t ·hm^-2, with an average value of 961.96 t ·hm^-2, which was 3 times of Chinese soil organic carbon storage of wetland, 5 times of Chinese forest soil organic carbon storage, and 11 times of Chinese grassland soil organic carbon storage. The results also revealed that the uncertainty on carbon storage estimation in peatland ecosystems was mainly related to peat depth, bulk density, and soil organic carbon concentration. Consequently, it is es-sential to further intensify the study on the data of these three soil factors in the peatlands, help- ing to accurately estimate carbon storage in Zoige Plateau.
出处
《生态学杂志》
CAS
CSCD
北大核心
2016年第8期1981-1987,共7页
Chinese Journal of Ecology
基金
中国清洁发展机制基金赠款项目(2012076)
中国林科院林业新技术所基本科研业务费专项(CAFINT2014K06)资助
关键词
生态系统碳储量
泥炭地
土壤有机碳储量
植被碳储量
若尔盖高原
ecosystems carbon storage
peatland
soil organic carbon storage
vegetation carbon storage
Zoige Plateau.
