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:	Haiyan Fang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	cultivated land soil erosion SOC losses land use policy black soil region Medicine R
Acceso en línea:	https://doaj.org/article/667b26aa72c641d48eca47932fd525bf
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spelling	oai:doaj.org-article:667b26aa72c641d48eca47932fd525bf2021-11-11T16:27:35ZChanges in Cultivated Land Area and Associated Soil and SOC Losses in Northeastern China: The Role of Land Use Policies10.3390/ijerph1821113141660-46011661-7827https://doaj.org/article/667b26aa72c641d48eca47932fd525bf2021-10-01T00:00:00Zhttps://www.mdpi.com/1660-4601/18/21/11314https://doaj.org/toc/1661-7827https://doaj.org/toc/1660-4601Land 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<sup>2</sup> in 1980, to 300.03 thousand km<sup>2</sup> in 2000, and to 344.16 thousand km<sup>2</sup> in 2010, and then decreased by 326.94 thousand km<sup>2</sup>. The mean soil loss rates changed from 590.66 t·km<sup>−2</sup>·yr<sup>−1</sup> in 1980 to 634.25 t·km<sup>−2</sup>·yr<sup>−1</sup> in 2010, and then decreased to 495.66 t·km<sup>−2</sup>·yr<sup>−1</sup> 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<sup>−2</sup>·yr<sup>−1</sup>. 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.Haiyan FangMDPI AGarticlecultivated landsoil erosionSOC lossesland use policyblack soil regionMedicineRENInternational Journal of Environmental Research and Public Health, Vol 18, Iss 11314, p 11314 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cultivated land soil erosion SOC losses land use policy black soil region Medicine R
spellingShingle	cultivated land soil erosion SOC losses land use policy black soil region Medicine R Haiyan Fang Changes in Cultivated Land Area and Associated Soil and SOC Losses in Northeastern China: The Role of Land Use Policies
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<sup>2</sup> in 1980, to 300.03 thousand km<sup>2</sup> in 2000, and to 344.16 thousand km<sup>2</sup> in 2010, and then decreased by 326.94 thousand km<sup>2</sup>. The mean soil loss rates changed from 590.66 t·km<sup>−2</sup>·yr<sup>−1</sup> in 1980 to 634.25 t·km<sup>−2</sup>·yr<sup>−1</sup> in 2010, and then decreased to 495.66 t·km<sup>−2</sup>·yr<sup>−1</sup> 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<sup>−2</sup>·yr<sup>−1</sup>. 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.
format	article
author	Haiyan Fang
author_facet	Haiyan Fang
author_sort	Haiyan Fang
title	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_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_sort	changes in cultivated land area and associated soil and soc losses in northeastern china: the role of land use policies
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/667b26aa72c641d48eca47932fd525bf
work_keys_str_mv	AT haiyanfang changesincultivatedlandareaandassociatedsoilandsoclossesinnortheasternchinatheroleoflandusepolicies
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Changes in Cultivated Land Area and Associated Soil and SOC Losses in Northeastern China: The Role of Land Use Policies

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