[1]NI Lingshan,YUE Rong,FANG Nufang.Estimation of Calcium Carbonate in Loess by Using Mid-Infrared Diffuse Reflectance Spectroscopy[J].Research of Soil and Water Conservation,2020,27(02):142-148.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 02
Page number:
142-148
Column:
Public date:
2020-03-30
- Title:
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Estimation of Calcium Carbonate in Loess by Using Mid-Infrared Diffuse Reflectance Spectroscopy
- Author(s):
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NI Lingshan1,2, YUE Rong3, FANG Nufang1,2,3
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(1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China; 2.University of Chinese Academy of Sciences, Beijing 100049, China; 3.Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shannxi 712100, China)
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- Keywords:
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mid-infrared diffuse reflectance spectroscopy; calcium carbonate; loess; regression modeling
- CLC:
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S153.6
- DOI:
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- Abstract:
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In order to explore the potentiality of predicting calcium carbonate in loess base on mid-infrared diffuse reflectance spectroscopy, a total of 126 soil samples and 108 sediment samples taken from 7 small catchments in hilly-gully regions with severe erosion on the Loess Plateau were selected. Different pretreatment methods were used to establish the calcium carbonate estimation model. The results indicate that the relationship between spectral variables and calcium carbonate content is closer to the linear correlation, the predictions by using PLSR method and PCR method are superior to those by using SVMR method. The PLSR(SG-Der1st)model is optimal, and can accurately predict the calcium carbonate contents of soils(R2=0.948, RPD=4.426)and sediments(R2=0.875, RPD=2.841). In summary, mid-infrared diffuse reflectance spectroscopy can provide a rapid and nondestructive alternative to estimate the calcium carbonate content in loess in the small catchments of the Loess Plateau.