生态学报2017，Vol.37Issue(21)：7068-7081,14.DOI:10.5846/stxb201609061815
松嫩平原农田土壤有机碳变化及固碳潜力估算
Temporal and spatial variations of organic carbon and evaluation of carbon sequestration potential in the agricultural topsoil of the Songnen Plain
摘要
Abstract
Soil organic carbon (SOC) density and storage in the agricultural topsoil of the Songnen Plain were evaluated by the soil-type method by using data from the Second National Soil Survey conducted in 1979-1985 and field observations in 2015.The spatial distribution of SOC density was analyzed by ArcGIS,and a fitting analysis of the changes in SOC storage trend in the districts and counties of the Songnen Plain over the past 35 years was conducted using the saturation value method,after which the carbon sequestration potential of the agricultural soil was estimated.The main results are as follows:(1) the average value of the agricultural topsoil organic carbon density was 1.61 kg/m2 in 2015.About 81.59％ of the SOC density of the agricultural topsoil area of the Songnen Plain showed a decreasing tendency over the last 35 years,and the SOC was mainly distributed in the north,east,and southeast of the Songnen Plain;the most significant decreases were in eastern Fuyu County,central Yi'an County,western Zhaodong County,and western Fuyu County;(2) the total storage of organic carbon in the agricultural topsoil was 233.63 Tg in 2015,which decreased by about 32.62 Tg compared with that of the second national soil survey;and (3) the organic carbon sequestration potential of agricultural topsoil in the Songnen Plain was about-32.7 TgC,indicating a carbon resource area,and its average value per unit area was-1.793 × 10-3 Tg C/km2.关键词
农田土壤有机碳/固碳潜力/松嫩平原Key words
organic carbon of agricultural topsoil/carbon sequestration potential/Songnen Plain引用本文复制引用
姜蓝齐,臧淑英,张丽娟,孙丽,阎炳和..松嫩平原农田土壤有机碳变化及固碳潜力估算[J].生态学报,2017,37(21):7068-7081,14.基金项目
国家自然科学基金(41571199,42171217) （41571199,42171217）
黑龙江省博士创新基金(HSDBSCX2015-12) （HSDBSCX2015-12）
黑龙江省自然科学基金(D201408,D201302) （D201408,D201302）
