青海东部表层土壤碳库特征研究
Study on the characteristics of surface soil carbon pool in Eastern Qinghai Province
刘庆宇 1马瑛 1程莉 2田兴元 1喻光建1
作者信息
- 1. 青海省第五地质勘查院,青海 西宁 810099;青海省富硒资源利用工程技术研究中心,青海 西宁 810099
- 2. 青海省地质矿产测试应用中心,青海 西宁 810000
- 折叠
摘要
通过整合青海省东部地区 33092 km2 多目标区域地球化学调查和土地质量地球化学调查数据,估算了青海东部地区土壤有机碳、无机碳和全碳的总储量及平均碳密度,并分析了表层土壤碳空间分布特征和不同土壤类型、土地利用及生态系统单位碳密度变化规律.结果表明:研究区表层土壤(0～20 cm)碳总储量为272.81 Mt,平均碳密度为8243.85 t/km2;不同的土壤类型、土地利用和生态系统均对表层土壤碳密度及分布规律产生影响;与土壤二普数据有机碳储量对比,青海东部地区整体属于碳源区,在过去 20 多年里青海东部表层土壤共释放约 53.21 Mt有机碳.
Abstract
By integrating the data of 33092 km2 multi-objective regional geochemical survey and land quality geochemical survey in Eastern Qinghai Province,the total storage and average carbon density of soil organic carbon,inorganic carbon and total carbon in Eastern Qinghai Province were estimated,and the spatial distribution characteristics of topsoil carbon and the change rules of carbon density per unit of different soil types,land use and ecosystems were analyzed.The results showed that the total carbon storage of topsoil(0～20 cm)in the study area was272.81 Mt,and the average carbon density was 8243.85 t/km2;Different soil types,land use and ecosystems all affect the carbon density and distribution of topsoil;Compared with the soil organic carbon storage of the second census data,the Eastern Qinghai Province belongs to the carbon source area as a whole,and the topsoil in Eastern Qinghai Province has released about 53.21 Mt of organic carbon in the past 20 years.
关键词
土壤碳库/土壤碳储量/表层土壤/土壤类型/青海东部Key words
Soil carbon pool/soil carbon storage/surface soil/soil type/Eastern Qinghai Province引用本文复制引用
基金项目
中国地质调查局国家公益性地质调查专项(DD20160319-07)
青海省省级财政地质勘查专项资金项目(2022012019jc013)
出版年
2024
NETL
NSTL
万方数据