LU Zhong-jun,LIU Ke-bao,XIN Rui,et al.Spatial Pattern Inversion of Soil Surface Organic Matter in Qinggang County, Heilongjiang Province Based on Sentinel-2 Image[J].HEILONGJIANG AGRICULTURAL SCIENCES,2022,(10):89-93.[doi:10.11942/j.issn1002-2767.2022.10.0089]
基于Sentinel2影像的青冈县土壤表层有机质空间格局反演
- Title:
- Spatial Pattern Inversion of Soil Surface Organic Matter in Qinggang County, Heilongjiang Province Based on Sentinel-2 Image
- 关键词:
- Sentinel-2; 土壤有机质; 空间格局; 反演
- Keywords:
- Sentinel-2; soil organic matter; spatial pattern; inversion
- 文献标志码:
- A
- 摘要:
- 为促进土壤碳氮循环研究和土壤质量评价,选择松嫩平原中部青冈县为研究区,以表层(0~20 cm)土壤有机质含量为研究对象,利用土壤有机质野外采集点状数据,基于哨兵(Sentinel-2)卫星全波段数据,反演研究区内土壤有机质含量。通过一景数据建模,另一景数据验证的方式,探索验证哨兵数据在土壤有机质遥感识别的迁移性和区域适用性,并结合高程和坡度数据分析土壤有机质空间分布特征。结果表明,(1)采用Sentinel-2卫星影像数据结合地面数据,用偏最小二乘回归法构建土壤有机质含量反演模型时,4种参数-原始波段(REF)、倒数(1/R)、对数的倒数[log(1/R)]和倒数的对数(1/logR)中倒数(1/R)的效果最好。(2)本研究利用同一年临近期两景Sentinel-2影像数据,探讨模型在邻近区域的适用性,验证精度RMSE为0.147,模型可用于青冈周边区域的土壤有机质含量反演。(3)黑土地保护利用项目区内伴随着纬度的升高,有机质含量呈现下降的趋势:210~220 m高程的平均土壤有机质最高,>230 m高程的平均土壤有机质含量最低,有机质含量在各高程等级差异性不明显;坡度≤2°区域有机质含量最高,伴随着坡度增加,有机质含量呈现降低趋势。
- Abstract:
- In order to promote the research of the soil carbon and nitrogen cycle and the evaluation of the soil quality, Qinggang in the middle of Songnen Plain was selected as the study area, and the content of soil organic matter in the surface layer (0-20 cm) was taken as the research object. The soil organic matter content in the study area was inversed by using the ground data collected in the field and based on the full band data of Sentinel-2 satellite image. The migration and regional applicability of the remote sensing identification in the Sentinel data of soil organic matter were explored and verified, through data modeling of one scene and data verification of another scene. The spatial distribution characteristics of soil organic matter in the study area were analyzed in combination with the elevation and slope data.The results showed three aspect,(1)When the study using Sentinel-2 satellite image data and ground data to construct the inversion model of soil organic matter content by partial least square regression, 1/R parameter had the best effect in 4 parameters-Original band(REF),1/R,log(1/R),1/logR. (2) In this study, the applicability of the model in the adjacent areas was discussed by using the Sentinel-2 image data of two scenes in the adjacent period of the same year. The validation accuracy RMSE was 0.147. This model can be used to retrieve the soil organic matter content in the surrounding areas of Qinggang.(3) In the black land protection and utilization project area, with the increase of latitude, the content of organic matter showed a downward trend: The average soil organic matter content at 210-220 m elevation was the highest, and the average soil organic matter content at >230 m elevation was the lowest, and the difference of organic matter content in each elevation grade was not obvious. The highest organic matter content was the area with slope gradient ≤2°, and with the increase of gradient, the organic matter content showed a decreasing trend.
参考文献/References:
[1]汤斯崴,林清美.澧县耕地土壤有机质状况及其差异性分析[J].湖南农业科学,2018(12):41-44.
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[J].HEILONGJIANG AGRICULTURAL SCIENCES,2020,(10):53.[doi:10.11942/j.issn1002-2767.2020.09.0053]
备注/Memo
收稿日期:2022-07-13