松嫩平原农田土壤有机碳变化及固碳潜力估算

发布时间：2018-05-20 04:12

本文选题：农田土壤有机碳 + 固碳潜力　；参考：《生态学报》2017年21期

【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/m~2,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/km~2。
[Abstract]:Based on the data of the second national soil census from 1979 to 1985 and the field sampling data in 2015, the soil organic carbon density and the soil carbon pool reserves in the surface soil of Songnen Plain and its counties in recent 35 years were calculated by using the soil type method. The spatial distribution and variation characteristics of soil organic carbon density in Songnen Plain were analyzed, and the change trend of soil organic carbon content in Songnen Plain and its counties and cities were simulated by using saturation value method to estimate the carbon sequestration potential of farmland soil in Songnen Plain. The results showed that the average soil organic carbon density in the Songnen Plain in 2015 was 1.61 kg 路m ~ (2) 路m ~ (2), and 81.59% of the soil organic carbon density decreased in the past 35 years, which was concentrated in the northern, eastern and southeast areas of the Songnen Plain. To the east of Fuyu County, the central part of Yi'an County, the west of Zhaodong County, Soil organic carbon density in the western part of Fuyu county is the biggest drop in soil organic carbon density. (2) the total soil organic carbon pool of surface soil in Songnen Plain was 233.63 Tg in 2015, which was 32.62 Tg3 less than the second National soil Census) in the Songnen Plain in 2015. The carbon sequestration potential is -32.7 TgC, showing a "carbon source" trend, The average value of carbon sequestration potential per unit area of farmland is -1.793 脳 10 ~ (-1) ~ (-3) Tg / Km ~ (2).
【作者单位】：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;
【基金】：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)
【分类号】：S153.6

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