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基于Landsat遥感影像和1:50 000土壤数据库的福州市耕地有机碳动态变化研究

李亚 张黎明 陈瀚阅 袁玉琦 邢世和

李亚, 张黎明, 陈瀚阅, 袁玉琦, 邢世和. 基于Landsat遥感影像和1:50 000土壤数据库的福州市耕地有机碳动态变化研究[J]. 中国生态农业学报(中英文), 2019, 27(4): 581-590. doi: 10.13930/j.cnki.cjea.180753
引用本文: 李亚, 张黎明, 陈瀚阅, 袁玉琦, 邢世和. 基于Landsat遥感影像和1:50 000土壤数据库的福州市耕地有机碳动态变化研究[J]. 中国生态农业学报(中英文), 2019, 27(4): 581-590. doi: 10.13930/j.cnki.cjea.180753
LI Ya, ZHANG Liming, CHEN Hanyue, YUAN Yuqi, XING Shihe. Estimation of changes in soil organic carbon in farmlands in Fuzhou City using Landsat vegetation data and 1:50 000 soil database[J]. Chinese Journal of Eco-Agriculture, 2019, 27(4): 581-590. doi: 10.13930/j.cnki.cjea.180753
Citation: LI Ya, ZHANG Liming, CHEN Hanyue, YUAN Yuqi, XING Shihe. Estimation of changes in soil organic carbon in farmlands in Fuzhou City using Landsat vegetation data and 1:50 000 soil database[J]. Chinese Journal of Eco-Agriculture, 2019, 27(4): 581-590. doi: 10.13930/j.cnki.cjea.180753

基于Landsat遥感影像和1:50 000土壤数据库的福州市耕地有机碳动态变化研究

doi: 10.13930/j.cnki.cjea.180753
基金项目: 

福建农林大学校杰出青年科研人才计划项目 xjq201508

国家自然科学基金青年项目 41401399

福建农林大学科技创新专项基金项目 KFA17616A

详细信息
    作者简介:

    李亚, 研究方向为土地资源可持续利用。E-mail:liya95519@163.com

    通讯作者:

    陈瀚阅, 研究方向为农业遥感。E-mail:chenhanyue.420@163.com

  • 中图分类号: S15

Estimation of changes in soil organic carbon in farmlands in Fuzhou City using Landsat vegetation data and 1:50 000 soil database

Funds: 

the Fund for Outstanding Youth Scholars of Fujian Agriculture and Forestry University xjq201508

the National Natural Science Foundation of China 41401399

the Special Fund for S & T Innovation of Fujian Agriculture and Forestry University KFA17616A

More Information
  • 摘要: 耕地土壤碳库是全球碳库中最为活跃的部分,其变化对全球气候变化产生重要影响。目前对耕地土壤有机碳估算多采用中、小系列比例尺的土壤数据库,较少结合遥感影像与大比例尺土壤数据库进行估算。基于此,本研究采用Landsat遥感影像和1:50 000高精度土壤数据库,以福建省福州市为例,基于遥感与碳循环过程模型对1987年和2016年耕地土壤有机碳动态变化进行研究。结果表明,利用Landsat影像反演得到的耕地土壤基础呼吸与土壤有机碳相关性强,建立的1987年和2016年模型R2分别为0.637和0.752。研究期间,全市耕地土壤有机碳密度从东部沿海向西部内陆地区递增,整体发挥着“碳汇”作用,有机碳密度和储量分别增加0.20 kg·m-2和2.946×105 t。从不同土壤类型比较得出,黄壤、红壤和水稻土是“碳汇”,有机碳密度分别增加0.70 kg·m-2、0.40 kg·m-2和0.19 kg·m-2;其他土类为“碳源”,其中,水稻土碳储量最大,两期在全市总碳储量中占比均超过90%。从不同行政区比较得出,仓山区、长乐区、马尾区和连江县为“碳源区”,其他地区为“碳汇区”,其中,仓山区碳储量一直为全市最低,两期占比均不足0.5%,而福清市则一直居于全市首位,占比均高于20%。总体而言,福州市耕地土壤有机碳30年间空间动态变化显著,在不同土类和行政区间存在差异,今后应根据不同耕地土壤类型和行政区的有机碳情况有针对性进行耕地管理。
  • 图  1  福建省1987年(21个, 左)和2016年(28个, 右)标准气象站点分布

    Figure  1.  Distribution of standard meteorological stations of Fujian Province in 1987 (21 stations, left) and 2016 (28 stations, right)

    图  2  福州市土壤类型(a)、耕地利用类型及采样点分布(b)图

    Figure  2.  Distribution of soil types (a), farmland use types and sampling points (b) in Fuzhou City

    图  3  1987年(a)和2016年(b)福州市耕地土壤有机碳密度与土壤基础呼吸的关系模型

    Figure  3.  Relationship between soil organic carbon density and soil basal respiration in farmland in 1987 (a) and 2016 (b) of Fuzhou City

    图  4  1987年(a)和2016年(b)福州市耕地土壤有机碳密度模拟值与观测值的比较

    Figure  4.  Comparison of modeled and measured soil organic carbon densities in farmland in 1987 (a) and 2016 (b) of Fuzhou City

    图  5  1987年(a)和2016年(b)福州市土壤有机碳密度(SOCD)空间分布

    Figure  5.  Spatial distribution of soil organic carbon density (SOCD) in farmland in 1987 (a) and 2016 (b) of Fuzhou City

    图  6  1987年(a)和2016年(b)福州市不同行政区年降水量和年均温

    1:福清市; 2:长乐区; 3:仓山区; 4:马尾区; 5:晋安区; 6:连江县; 7:永泰县; 8:闽侯县; 9:闽清县; 10:罗源县。

    Figure  6.  Annual precipitation and mean temperature in different administration areas in Fuzhou City in 1987 (a) and 2016 (b)

    1: Fuqing City; 2: Changle District; 3: Cangshan District; 4: Mawei District; 5: Jin'an District; 6: Lianjiang County; 7: Yongtai County; 8: Minhou County; 9: Minqing County; 10: Luoyuan County.

    表  1  1987年和2016年福州市耕地土壤有机碳密度统计

    Table  1.   Statistics of soil organic carbon density in farmland in 1987 and 2016 of Fuzhou City

    年份
    Year
    最小值
    Min
    (kg·m-2)
    最大值
    Max
    (kg·m-2)
    平均值
    Mean
    (kg·m-2)
    标准差
    SD
    变异系数
    CV (%)
    1987 0.97 4.92 3.12 0.48 15.25
    2016 0.44 6.16 3.31 0.92 27.80
    下载: 导出CSV

    表  2  1987年和2016年福州市不同土类耕地土壤有机碳密度和储量

    Table  2.   Organic carbon densities and carbon storages in farmland of different soil groups in 1987 and 2016 of Fuzhou City

    土类
    Soil group
    面积
    Area
    (hm2)
    1987 2016 两期比较Comparison between two years
    密度
    Density (kg·m-2)
    储量
    Storage (103t)
    密度
    Density (kg·m-2)
    储量
    Storage (103t)
    密度
    Density (kg·m-2)
    储量
    Storage (103t)
    滨海盐土Coastal solonchaks 592 3.01 18.0 2.94 17.0 -0.07 -0.39
    潮土Fluvo-aquic soil 330 2.87 9.5 2.55 8.4 -0.32 -1.06
    赤红壤Latosolic red soil 46 2.97 1.4 2.66 1.2 -0.31 -0.14
    风砂土Aeolian soil 431 2.74 12.0 2.62 11.0 -0.12 -0.53
    红壤Red earth 8 399 3.00 252.0 3.39 285.0 0.40 33.00
    黄壤Yellow earth 30 2.88 0.9 3.58 1.1 0.70 0.21
    水稻土Paddy soil 139 469 3.13 4 359.0 3.31 4 622.0 0.19 263.00
    紫色土Purplish soil 12 3.28 0.4 3.01 0.4 -0.27 -0.03
    总计Total 149 309 3.12 4 652.0 3.31 4 947.0 0.20 295.00
    下载: 导出CSV

    表  3  1987年和2016年福州市不同行政区耕地土壤有机碳密度和储量

    Table  3.   Organic carbon density and carbon storage in farmland soils of different administration areas in 1987 and 2016 of Fuzhou City

    行政区
    Administrative area
    面积
    Area (hm2)
    1987 2016 两期比较Comparison between two years
    密度
    Density (kg·m-2)
    储量
    Storage (103 t)
    密度
    Density (kg·m-2)
    储量
    Storage (103 t)
    密度
    Density (kg·m-2)
    储量
    Storage (103 t)
    仓山区Cangshan District 544 2.79 15 1.95 11 -0.84 -4.5
    福清市Fuqing City 35 105 3.11 1 093 3.45 1 212 0.34 119.0
    晋安区Jin’an District 3 261 3.00 98 3.33 109 0.33 11.0
    连江县Lianjiang County 15 545 3.07 477 3.05 474 -0.02 -3.1
    罗源县Luoyuan County 12 548 3.11 391 3.22 404 0.10 13.0
    马尾区Mawei District 1 885 3.14 59 3.00 57 -0.14 -2.7
    闽侯县Minhou County 26 919 3.16 851 3.59 967 0.43 116.0
    闽清县Minqing County 17 741 3.23 574 3.63 644 0.40 71.0
    永泰县Yongtai County 20 418 3.23 660 3.35 684 0.12 24.0
    长乐区Changle District 15 343 2.83 435 2.51 385 -0.32 -49.0
    总计Total 149 309 3.12 4 652 3.31 4 947 0.20 295.0
    下载: 导出CSV
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