Predicting Soil Organic Carbon and Soil Nitrogen Stocks in Topsoil of Forest Ecosystems in Northeastern China Using Remote Sensing Data
Forest ecosystems play an important role in regional carbon and nitrogen cycling. Accurate and effective monitoring of their soil organic carbon (SOC) and soil total nitrogen (STN) stocks provides important information for soil quality assessment, sustainable forestry management and climate change p...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-03-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/12/7/1115 |
| _version_ | 1797571788703531008 |
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| author | Shuai Wang Qianlai Zhuang Xinxin Jin Zijiao Yang Hongbin Liu |
| author_facet | Shuai Wang Qianlai Zhuang Xinxin Jin Zijiao Yang Hongbin Liu |
| author_sort | Shuai Wang |
| collection | DOAJ |
| description | Forest ecosystems play an important role in regional carbon and nitrogen cycling. Accurate and effective monitoring of their soil organic carbon (SOC) and soil total nitrogen (STN) stocks provides important information for soil quality assessment, sustainable forestry management and climate change policy making. In this study, a geographical weighted regression (GWR) model, a multiple stepwise regression (MLSR) model, and a boosted regression trees (BRT) model were compared to obtain the best prediction of SOC and STN stocks of the forest ecosystems in northeastern China. Five-hundred and thirteen topsoil (0–30 cm) samples (10.32 kg m<sup>−2</sup> (±0.53) for SOC, 1.21 kg m<sup>−2</sup> (±0.32) for STN), and 9 remotely-sensed environmental variables were collected and used for the model development and verification. By comparing with independent verification data, the best model (BRT) achieved R<sup>2</sup> = 0.56 and root mean square error (RMSE) = 00.85 kg m<sup>−2</sup> for SOC stocks, R<sup>2</sup> = 0.51 and RMSE = 0.22 kg m<sup>−2</sup> for STN stocks. Of all the remotely-sensed environment variables, soil adjusted vegetation index (SAVI) and normalized difference vegetation index (NDVI) are of the highest relative importance in predicting SOC and STN stocks. The spatial distribution of the predicted SOC and STN stocks gradually decreased from northeast to southwest. This study provides an attempt to rapidly predict SOC and STN stocks in the dense vegetation covered area. The results can help evaluate soil quality and facilitate land policy and regulation making by the government in the region. |
| first_indexed | 2024-03-10T20:46:32Z |
| format | Article |
| id | doaj.art-111eaf47f75c49129532d2af519f8af8 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T20:46:32Z |
| publishDate | 2020-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-111eaf47f75c49129532d2af519f8af82023-11-19T20:17:05ZengMDPI AGRemote Sensing2072-42922020-03-01127111510.3390/rs12071115Predicting Soil Organic Carbon and Soil Nitrogen Stocks in Topsoil of Forest Ecosystems in Northeastern China Using Remote Sensing DataShuai Wang0Qianlai Zhuang1Xinxin Jin2Zijiao Yang3Hongbin Liu4College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, Liaoning Province, ChinaDepartment of Earth, Atmospheric and Planetary Sciences, Purdue University, West Lafayette, IN 47907, USACollege of Land and Environment, Shenyang Agricultural University, Shenyang 110866, Liaoning Province, ChinaCollege of Land and Environment, Shenyang Agricultural University, Shenyang 110866, Liaoning Province, ChinaCollege of Land and Environment, Shenyang Agricultural University, Shenyang 110866, Liaoning Province, ChinaForest ecosystems play an important role in regional carbon and nitrogen cycling. Accurate and effective monitoring of their soil organic carbon (SOC) and soil total nitrogen (STN) stocks provides important information for soil quality assessment, sustainable forestry management and climate change policy making. In this study, a geographical weighted regression (GWR) model, a multiple stepwise regression (MLSR) model, and a boosted regression trees (BRT) model were compared to obtain the best prediction of SOC and STN stocks of the forest ecosystems in northeastern China. Five-hundred and thirteen topsoil (0–30 cm) samples (10.32 kg m<sup>−2</sup> (±0.53) for SOC, 1.21 kg m<sup>−2</sup> (±0.32) for STN), and 9 remotely-sensed environmental variables were collected and used for the model development and verification. By comparing with independent verification data, the best model (BRT) achieved R<sup>2</sup> = 0.56 and root mean square error (RMSE) = 00.85 kg m<sup>−2</sup> for SOC stocks, R<sup>2</sup> = 0.51 and RMSE = 0.22 kg m<sup>−2</sup> for STN stocks. Of all the remotely-sensed environment variables, soil adjusted vegetation index (SAVI) and normalized difference vegetation index (NDVI) are of the highest relative importance in predicting SOC and STN stocks. The spatial distribution of the predicted SOC and STN stocks gradually decreased from northeast to southwest. This study provides an attempt to rapidly predict SOC and STN stocks in the dense vegetation covered area. The results can help evaluate soil quality and facilitate land policy and regulation making by the government in the region.https://www.mdpi.com/2072-4292/12/7/1115soil organic carbon stockssoil total nitrogen stocksremote sensing dataspatial variationdigital soil mapping |
| spellingShingle | Shuai Wang Qianlai Zhuang Xinxin Jin Zijiao Yang Hongbin Liu Predicting Soil Organic Carbon and Soil Nitrogen Stocks in Topsoil of Forest Ecosystems in Northeastern China Using Remote Sensing Data Remote Sensing soil organic carbon stocks soil total nitrogen stocks remote sensing data spatial variation digital soil mapping |
| title | Predicting Soil Organic Carbon and Soil Nitrogen Stocks in Topsoil of Forest Ecosystems in Northeastern China Using Remote Sensing Data |
| title_full | Predicting Soil Organic Carbon and Soil Nitrogen Stocks in Topsoil of Forest Ecosystems in Northeastern China Using Remote Sensing Data |
| title_fullStr | Predicting Soil Organic Carbon and Soil Nitrogen Stocks in Topsoil of Forest Ecosystems in Northeastern China Using Remote Sensing Data |
| title_full_unstemmed | Predicting Soil Organic Carbon and Soil Nitrogen Stocks in Topsoil of Forest Ecosystems in Northeastern China Using Remote Sensing Data |
| title_short | Predicting Soil Organic Carbon and Soil Nitrogen Stocks in Topsoil of Forest Ecosystems in Northeastern China Using Remote Sensing Data |
| title_sort | predicting soil organic carbon and soil nitrogen stocks in topsoil of forest ecosystems in northeastern china using remote sensing data |
| topic | soil organic carbon stocks soil total nitrogen stocks remote sensing data spatial variation digital soil mapping |
| url | https://www.mdpi.com/2072-4292/12/7/1115 |
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