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Changes in Cultivated Land Area and Associated Soil and SOC Losses in Northeastern China: The Role of Land Use Policies

Land use policy is the driving factor influencing land use; however, little research has been conducted to identify the role of agricultural policy in influencing land cultivation and associated soil and soil organic carbon (SOC) losses. The aims of this study were to explore temporal changes in cul...

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Autor principal: Fang, Haiyan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8583069/
https://www.ncbi.nlm.nih.gov/pubmed/34769829
http://dx.doi.org/10.3390/ijerph182111314
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author Fang, Haiyan
author_facet Fang, Haiyan
author_sort Fang, Haiyan
collection PubMed
description Land use policy is the driving factor influencing land use; however, little research has been conducted to identify the role of agricultural policy in influencing land cultivation and associated soil and soil organic carbon (SOC) losses. The aims of this study were to explore temporal changes in cultivated land, soil erosion, and SOC loss and to identify the role of land use policy. The present study was conducted using the revised universal soil loss equation by integrating remote sensing images from 1980, 1990, 2000, and 2017. The study found that cultivated land areas increased from 275.11 thousand km(2) in 1980, to 300.03 thousand km(2) in 2000, and to 344.16 thousand km(2) in 2010, and then decreased by 326.94 thousand km(2). The mean soil loss rates changed from 590.66 t·km(−2)·yr(−1) in 1980 to 634.25 t·km(−2)·yr(−1) in 2010, and then decreased to 495.66 t·km(−2)·yr(−1) in 2017. Soil loss rate increased with increasing slope gradient. The changes in SOC loss rates demonstrated the same pattern as that of soil loss, with the largest loss rate of 728.27 kg·km(−2)·yr(−1). These changes can be explained by changed land use policy and population growth. In future land use management, reasonable implementation of soil conservation measures should be undertaken to reduce soil and SOC losses in the black soil region of northeastern China.
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spelling pubmed-85830692021-11-12 Changes in Cultivated Land Area and Associated Soil and SOC Losses in Northeastern China: The Role of Land Use Policies Fang, Haiyan Int J Environ Res Public Health Article Land use policy is the driving factor influencing land use; however, little research has been conducted to identify the role of agricultural policy in influencing land cultivation and associated soil and soil organic carbon (SOC) losses. The aims of this study were to explore temporal changes in cultivated land, soil erosion, and SOC loss and to identify the role of land use policy. The present study was conducted using the revised universal soil loss equation by integrating remote sensing images from 1980, 1990, 2000, and 2017. The study found that cultivated land areas increased from 275.11 thousand km(2) in 1980, to 300.03 thousand km(2) in 2000, and to 344.16 thousand km(2) in 2010, and then decreased by 326.94 thousand km(2). The mean soil loss rates changed from 590.66 t·km(−2)·yr(−1) in 1980 to 634.25 t·km(−2)·yr(−1) in 2010, and then decreased to 495.66 t·km(−2)·yr(−1) in 2017. Soil loss rate increased with increasing slope gradient. The changes in SOC loss rates demonstrated the same pattern as that of soil loss, with the largest loss rate of 728.27 kg·km(−2)·yr(−1). These changes can be explained by changed land use policy and population growth. In future land use management, reasonable implementation of soil conservation measures should be undertaken to reduce soil and SOC losses in the black soil region of northeastern China. MDPI 2021-10-28 /pmc/articles/PMC8583069/ /pubmed/34769829 http://dx.doi.org/10.3390/ijerph182111314 Text en © 2021 by the author. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Fang, Haiyan
Changes in Cultivated Land Area and Associated Soil and SOC Losses in Northeastern China: The Role of Land Use Policies
title Changes in Cultivated Land Area and Associated Soil and SOC Losses in Northeastern China: The Role of Land Use Policies
title_full Changes in Cultivated Land Area and Associated Soil and SOC Losses in Northeastern China: The Role of Land Use Policies
title_fullStr Changes in Cultivated Land Area and Associated Soil and SOC Losses in Northeastern China: The Role of Land Use Policies
title_full_unstemmed Changes in Cultivated Land Area and Associated Soil and SOC Losses in Northeastern China: The Role of Land Use Policies
title_short Changes in Cultivated Land Area and Associated Soil and SOC Losses in Northeastern China: The Role of Land Use Policies
title_sort changes in cultivated land area and associated soil and soc losses in northeastern china: the role of land use policies
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8583069/
https://www.ncbi.nlm.nih.gov/pubmed/34769829
http://dx.doi.org/10.3390/ijerph182111314
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