生态环境学报2016，Vol.25Issue(3)：422-431,10.DOI:10.16258/j.cnki.1674-5906.2016.03.009
基于高精度土壤数据库的苏北旱地固碳速率和潜力研究
Study of Soil Organic Carbon Sequestration Rate and Potential of Upland in Northern Jiangsu Province Based on High-resolution Soil Database
摘要
Abstract
Upland covers more than 70% of China’s cropland; therefore understanding carbon sequestration rate and potential for upland at different periods plays a key role in making policies on cropland in China to reduce greenhouse gas emissions and recommend management measures of carbon sequestration and mitigation CO2 emissions. Taking the upland in the 29 counties (or cities) of the northern Jiangsu Province, a part of Huang-Huai-Hai region, as study zone. The study linked the biogeochemical DNDC (Denitrification and decomposition) model to a newly soil map with improved spatial high-resolution (1∶50000 soil database) of the northern Jiangsu Province to estimate the carbon sequestration rate and potential for three different periods for 2010─2040(30 a), 2010─2070 (60 a) and 2010─2100 (90 a). The result shows, the carbon sequestration amount for the upland of 3.93×106 hm2 in the northern Jiangsu Province is 43.18, 69.40 and 88.91 Tg, with the average annual carbon sequestration rate standing at 367, 295 and 252 kg·hm-2, respectively. For soil groups, the highest carbon sequestration rate occurs in fluvo-aquic soil and purplish soil, with the average annual carbon sequestration amount mostly above 300 kg·hm-2 at different periods; however, the lowest in lithosols soil and limestone soil, with the average annual carbon sequestration amount almost below 200 kg·hm-2 at different periods. For the spatial distribution, the Guannan city, located in the northern part, experiences the greatest carbon sequestration rate in the region, with the average annual carbon sequestration amount beyond 330 kg·hm-2at different periods; while, the Xuyi city, located in the central parts, with the average annual carbon sequestration amount below 250 kg·hm-2 at different periods, witnesses the lowest carbon sequestration rate. Overall, the differences of soil groups and counties (or cities) in carbon sequestration potential and rate are obvious in northern Jiangsu Province, so it is imperative to appropriately formulate the measures of carbon sequestration and mitigation CO2 emissions according to the soil groups and administrative units in the region.关键词
1∶50000数据库/DNDC(Denitrification and Decomposition)模型/苏北旱地/固碳潜力/固碳速率Key words
1∶50000 database/DNDC (Denitrification and decomposition) model/upland in northern Jiangsu Province/carbon sequestration potential/carbon sequestration rate分类
资源环境引用本文复制引用
王光翔,张黎明,李晓迪,于东升,史学正,邢世和,陈翰阅..基于高精度土壤数据库的苏北旱地固碳速率和潜力研究[J].生态环境学报,2016,25(3):422-431,10.基金项目
国家自然科学基金项目（41001126）；福建省自然科学基金项目（2015J01154）；福建省高校杰出青年科研人才计划基金 （）
