Estimating soil carbon stocks in an upland area of Tokachi District, Hokkaido, Japan, by satellite remote sensing(Soil Genesis, Classification and Survey)

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概要

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• Soil carbon stocks (SCSs) in an upland area of Tokachi District, Hokkaido, Japan, were estimated by satellite remote sensing and a soil survey. The soil parent materials in the studied area were alluvial deposits, volcanic ash plus alluvial deposits, and volcanic ash. Surface soil carbon concentrations (SSCCs) were negatively correlated with satellite image data (green, red, and near-infrared reflectance) for each parent material. The highest correlations between reflectance and SSCCs were obtained from red wavelength reflectance for alluvial deposits (r=-0.82, p<0.01) and volcanic ash plus alluvial deposits (r=-0.91, p<0.01), and from near-infrared reflectance for volcanic ash (r=-0.90, p<0.01). We generated an SSCC map of the study area using the regression equations and satellite reflectance data. The soil survey results showed that SSCCs were positively correlated with SCSs in the 0-30cm depth interval for each parent material (best-fit regressions: alluvial deposits, r=0.97; volcanic ash plus alluvial deposits, r=0.97; volcanic ash, r=0.97), and they were also positively correlated with SCSs in the 30-95cm depth interval for volcanic ash (r=0.94). We were therefore able to generate a map of estimated SCSs from the SSCC map and the regression equations developed between SSCCs and SCSs. The estimated and measured SCSs in both depth intervals showed an almost 1:1 relationship, with root-mean-square errors of 19.5 (0-30cm) and 28.6Mg carbon (C) ha^<-1> (30-95cm). According to the SCS maps, SCSs at 0-30cm depth in areas of alluvial deposits, volcanic ash plus alluvial deposits, and volcanic ash were mostly 50-150, 100-200, and 50-250MgCha^<-1>, respectively, whereas at 30-95cm depth in the volcanic ash area they were mostly less than 250MgCha^<-1>.

• 一般社団法人日本土壌肥料学会の論文

著者

• NIWA Katsuhisa

  Zukosha

• YOKOBORI Jun

  Zukosha

• HONGO Chiharu

  Center for Environmental Remote Sensing, Chiba University

• Hongo Chiharu

  Center For Environmental Remote Sensing Chiba University

• Nagata Osamu

  National Agricultural Res. Center For Hokkaido Region Bibai Jpn

• Nagata Osamu

  National Agricultural Research Center For Hokkaido Region

• Yokobori Jun

  Zukosha Co. Ltd

関連論文

• Effect of soil type on the time-course of changes in sugar beet (Beta vulgaris L.) productivity in Tokachi District, Hokkaido, Japan(Soil Fertility)
• Evaluation of ASTER GDEM data as the input factor of USLE model(Poster Session,ICSANE 2011(International Conference on Space, Aeronautical and Navigational Electronics 2011))
• The use of remotely sensed data for estimating of rice yield(Poster Session,ICSANE 2011(International Conference on Space, Aeronautical and Navigational Electronics 2011))
• Estimating soil carbon stocks in an upland area of Tokachi District, Hokkaido, Japan, by satellite remote sensing(Soil Genesis, Classification and Survey)

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