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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.生态学报,2017,37(21):7068~7081 本文二维码信息
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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
投稿时间:2016-09-06  
DOI: 10.5846/stxb201609061815
关键词农田土壤有机碳  固碳潜力  松嫩平原
Key Wordsorganic carbon of agricultural topsoil  carbon sequestration potential  Songnen Plain
基金项目国家自然科学基金(41571199,42171217);黑龙江省博士创新基金(HSDBSCX2015-12);黑龙江省自然科学基金(D201408,D201302)
作者单位E-mail
姜蓝齐 哈尔滨师范大学, 黑龙江省普通高等学校地理环境遥感监测重点实验室, 哈尔滨 150025  
臧淑英 哈尔滨师范大学, 黑龙江省普通高等学校地理环境遥感监测重点实验室, 哈尔滨 150025 zsy6311@163.com 
张丽娟 哈尔滨师范大学, 黑龙江省普通高等学校地理环境遥感监测重点实验室, 哈尔滨 150025  
孙丽 哈尔滨师范大学, 黑龙江省普通高等学校地理环境遥感监测重点实验室, 哈尔滨 150025  
阎炳和 哈尔滨师范大学, 黑龙江省普通高等学校地理环境遥感监测重点实验室, 哈尔滨 150025  
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摘要:
基于1979-1985年全国第二次土壤普查和2015年实地采样数据,利用土壤类型法计算了近35年来松嫩平原及其各县农田表层土壤有机碳密度和土壤碳库储量;并分析了松嫩平原农田土壤有机碳密度的空间分布及变化特征;利用饱和值法对松嫩平原及其各县市农田土壤有机碳量的变化趋势进行拟合,估算其农田土壤的固碳潜力。结果表明:(1)2015年松嫩平原农田表层土壤有机碳密度平均值为1.61 kg/m2,近35年来约有81.59%的农田土壤有机碳密度呈下降趋势,集中分布在松嫩平原北部、东部和东南部地区,以富裕县东部、依安县中部、肇东县西部、扶余县西部等地区土壤有机碳密度下降幅度最大;(2)2015年松嫩平原农田表层土壤有机碳库总储量为233.63 Tg,比全国第二次土壤普查减少了32.62 Tg;(3)2015年松嫩平原农田表层土壤总固碳潜力为-32.7 TgC,呈现出"碳源"趋势,农田土壤单位面积固碳潜力平均值为-1.793×10-3 Tg/km2
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.
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