Cropland heterogeneity changes on the Northeast China Plain in the last three decades (1980s–2010s)
The Northeast China Plain is one of the major grain-producing areas of China because of its fertile black soil and large fields adapted for agricultural machinery. It has experienced some land-use changes, such as urbanization, deforestation, and wetland reclamation in recent decades. A comprehensiv...
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PeerJ Inc.
2020-09-01
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| author | Xiaoxuan Liu Le Yu Qinghan Dong Dailiang Peng Wenbin Wu Qiangyi Yu Yuqi Cheng Yidi Xu Xiaomeng Huang Zheng Zhou Dong Wang Lei Fang Peng Gong |
| author_facet | Xiaoxuan Liu Le Yu Qinghan Dong Dailiang Peng Wenbin Wu Qiangyi Yu Yuqi Cheng Yidi Xu Xiaomeng Huang Zheng Zhou Dong Wang Lei Fang Peng Gong |
| author_sort | Xiaoxuan Liu |
| collection | DOAJ |
| description | The Northeast China Plain is one of the major grain-producing areas of China because of its fertile black soil and large fields adapted for agricultural machinery. It has experienced some land-use changes, such as urbanization, deforestation, and wetland reclamation in recent decades. A comprehensive understanding of these changes in terms of the total cropping land and its heterogeneity during this period is important for policymakers. In this study, we used a series of cropland products at the 30-m resolution for the period 1980–2015. The heterogeneity for dominant cropland decreased slowly over the three decades, especially for the large pieces of cropland, showing a general trend of increased cropland homogeneity. The spatial patterns of the averaged heterogeneity index were nearly the same, varying from 0.5 to 0.6, and the most heterogeneous areas were mainly located in some separate counties. Cropland expansion occurred across most of Northeast China, while cropland shrinking occurred only in the northern and eastern sections of Northeast China and around the capital cities, in the flat areas. Also, changes in land use away from cropland mainly occurred in areas with low elevation (50–200 m) and a gentle slope (less than 1 degree). The predominant changes in cropland were gross gain and homogeneity, occurring across most of the area except capital cities and boundary areas. Possible reasons for the total cropland heterogeneity changes were urbanization, restoration of cropland to forest, and some government land-use policies. Moreover, this study evaluates the effectiveness of cropland policies influencing in Northeast China. |
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| institution | Directory Open Access Journal |
| issn | 2167-8359 |
| language | English |
| last_indexed | 2024-03-09T08:17:21Z |
| publishDate | 2020-09-01 |
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| spelling | doaj.art-1e5dceadc59f42758b179ef7957558272023-12-02T21:59:48ZengPeerJ Inc.PeerJ2167-83592020-09-018e983510.7717/peerj.9835Cropland heterogeneity changes on the Northeast China Plain in the last three decades (1980s–2010s)Xiaoxuan Liu0Le Yu1Qinghan Dong2Dailiang Peng3Wenbin Wu4Qiangyi Yu5Yuqi Cheng6Yidi Xu7Xiaomeng Huang8Zheng Zhou9Dong Wang10Lei Fang11Peng Gong12Department of Earth System Science, Ministry of Education Key Laboratory for Earth System Modeling, Tsinghua University, Beijing, ChinaDepartment of Earth System Science, Ministry of Education Key Laboratory for Earth System Modeling, Tsinghua University, Beijing, ChinaDepartment of Remote Sensing Boeretang 200, Flemish Institute of Technology (VITO), Mol, BelgiumInstitute of Remote Sensing and Digital Earth,Chinese Academy of Sciences, Key Laboratory of Digital Earth Science, Beijing, ChinaMinistry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Key Laboratory of Agricultural Remote Sensing (AGRIRS), Beijing, ChinaMinistry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Key Laboratory of Agricultural Remote Sensing (AGRIRS), Beijing, ChinaDepartment of Earth System Science, Ministry of Education Key Laboratory for Earth System Modeling, Tsinghua University, Beijing, ChinaDepartment of Earth System Science, Ministry of Education Key Laboratory for Earth System Modeling, Tsinghua University, Beijing, ChinaDepartment of Earth System Science, Ministry of Education Key Laboratory for Earth System Modeling, Tsinghua University, Beijing, ChinaDepartment of Earth System Science, Ministry of Education Key Laboratory for Earth System Modeling, Tsinghua University, Beijing, ChinaDepartment of Earth System Science, Ministry of Education Key Laboratory for Earth System Modeling, Tsinghua University, Beijing, ChinaChinese Academy Sciences, CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Shenyang, ChinaDepartment of Earth System Science, Ministry of Education Key Laboratory for Earth System Modeling, Tsinghua University, Beijing, ChinaThe Northeast China Plain is one of the major grain-producing areas of China because of its fertile black soil and large fields adapted for agricultural machinery. It has experienced some land-use changes, such as urbanization, deforestation, and wetland reclamation in recent decades. A comprehensive understanding of these changes in terms of the total cropping land and its heterogeneity during this period is important for policymakers. In this study, we used a series of cropland products at the 30-m resolution for the period 1980–2015. The heterogeneity for dominant cropland decreased slowly over the three decades, especially for the large pieces of cropland, showing a general trend of increased cropland homogeneity. The spatial patterns of the averaged heterogeneity index were nearly the same, varying from 0.5 to 0.6, and the most heterogeneous areas were mainly located in some separate counties. Cropland expansion occurred across most of Northeast China, while cropland shrinking occurred only in the northern and eastern sections of Northeast China and around the capital cities, in the flat areas. Also, changes in land use away from cropland mainly occurred in areas with low elevation (50–200 m) and a gentle slope (less than 1 degree). The predominant changes in cropland were gross gain and homogeneity, occurring across most of the area except capital cities and boundary areas. Possible reasons for the total cropland heterogeneity changes were urbanization, restoration of cropland to forest, and some government land-use policies. Moreover, this study evaluates the effectiveness of cropland policies influencing in Northeast China.https://peerj.com/articles/9835.pdfLand-use changeCropland areaHeterogeneityNortheast China |
| spellingShingle | Xiaoxuan Liu Le Yu Qinghan Dong Dailiang Peng Wenbin Wu Qiangyi Yu Yuqi Cheng Yidi Xu Xiaomeng Huang Zheng Zhou Dong Wang Lei Fang Peng Gong Cropland heterogeneity changes on the Northeast China Plain in the last three decades (1980s–2010s) PeerJ Land-use change Cropland area Heterogeneity Northeast China |
| title | Cropland heterogeneity changes on the Northeast China Plain in the last three decades (1980s–2010s) |
| title_full | Cropland heterogeneity changes on the Northeast China Plain in the last three decades (1980s–2010s) |
| title_fullStr | Cropland heterogeneity changes on the Northeast China Plain in the last three decades (1980s–2010s) |
| title_full_unstemmed | Cropland heterogeneity changes on the Northeast China Plain in the last three decades (1980s–2010s) |
| title_short | Cropland heterogeneity changes on the Northeast China Plain in the last three decades (1980s–2010s) |
| title_sort | cropland heterogeneity changes on the northeast china plain in the last three decades 1980s 2010s |
| topic | Land-use change Cropland area Heterogeneity Northeast China |
| url | https://peerj.com/articles/9835.pdf |
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