Spatiotemporal Heterogeneity Monitoring of Cropland Evolution and Its Impact on Grain Production Changes in the Southern Sanjiang Plain of Northeast China
High-speed cropland changes are taking place in Northeast China, bringing about the sustainable changes in ecological landscape and food production; however, the lack of continuous research limits the revelation of new findings in this region. The integrated approach of land migration tracking, ecol...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-07-01
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| Series: | Land |
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| Online Access: | https://www.mdpi.com/2073-445X/11/8/1159 |
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| author | Tao Pan Ru Zhang |
| author_facet | Tao Pan Ru Zhang |
| author_sort | Tao Pan |
| collection | DOAJ |
| description | High-speed cropland changes are taking place in Northeast China, bringing about the sustainable changes in ecological landscape and food production; however, the lack of continuous research limits the revelation of new findings in this region. The integrated approach of land migration tracking, ecological landscape and mathematical statistics was established to conduct a comprehensive survey of land change–landscape–food security in a typical grain-planting region of Northeast China to reveal new changes from 1990 to 2020. Results display that the cropland area continued to increase from 25,885.16 km<sup>2</sup> in 1990 to 31,144.46 km<sup>2</sup> in 2020, leading to the loss of forest land, grassland, water body and unused land. For cropland structure, the proportion of paddy fields in cropland increased rapidly from 7.18 to 39.53% during 1990–2020; in contrast, upland crops decreased sharply. The richness of landscape presented gradually complex characteristics with SHDI from 0.258 to 0.671 and other ecological indicators underwent similar changes with strong regularity. Total grain production displayed a continuous increase, with values from 523.79 × 10<sup>4</sup> t to 1839.12 × 10<sup>4</sup> t, increasing by 2.51 times from 1990 to 2020. We also revealed the contribution rate of unchanged upland crops to grain increments was the largest (i.e., 46.29%), and the conversion of internal cropland structure (i.e., the paddy fields converted from upland crops) contributed 12.17% from 1990 to 2020, showing a positive signal for food security. These new findings provide studies on land use change, ecological landscape and food security in China and abroad. |
| first_indexed | 2024-03-09T13:06:42Z |
| format | Article |
| id | doaj.art-6e6acf3a4bf14e58a28e7b27fd501c5a |
| institution | Directory Open Access Journal |
| issn | 2073-445X |
| language | English |
| last_indexed | 2024-03-09T13:06:42Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Land |
| spelling | doaj.art-6e6acf3a4bf14e58a28e7b27fd501c5a2023-11-30T21:47:05ZengMDPI AGLand2073-445X2022-07-01118115910.3390/land11081159Spatiotemporal Heterogeneity Monitoring of Cropland Evolution and Its Impact on Grain Production Changes in the Southern Sanjiang Plain of Northeast ChinaTao Pan0Ru Zhang1School of Geography and Tourism, Qufu Normal University, Rizhao 276826, ChinaSchool of Public Administration and Law, Northeast Agricultural University, Harbin 150030, ChinaHigh-speed cropland changes are taking place in Northeast China, bringing about the sustainable changes in ecological landscape and food production; however, the lack of continuous research limits the revelation of new findings in this region. The integrated approach of land migration tracking, ecological landscape and mathematical statistics was established to conduct a comprehensive survey of land change–landscape–food security in a typical grain-planting region of Northeast China to reveal new changes from 1990 to 2020. Results display that the cropland area continued to increase from 25,885.16 km<sup>2</sup> in 1990 to 31,144.46 km<sup>2</sup> in 2020, leading to the loss of forest land, grassland, water body and unused land. For cropland structure, the proportion of paddy fields in cropland increased rapidly from 7.18 to 39.53% during 1990–2020; in contrast, upland crops decreased sharply. The richness of landscape presented gradually complex characteristics with SHDI from 0.258 to 0.671 and other ecological indicators underwent similar changes with strong regularity. Total grain production displayed a continuous increase, with values from 523.79 × 10<sup>4</sup> t to 1839.12 × 10<sup>4</sup> t, increasing by 2.51 times from 1990 to 2020. We also revealed the contribution rate of unchanged upland crops to grain increments was the largest (i.e., 46.29%), and the conversion of internal cropland structure (i.e., the paddy fields converted from upland crops) contributed 12.17% from 1990 to 2020, showing a positive signal for food security. These new findings provide studies on land use change, ecological landscape and food security in China and abroad.https://www.mdpi.com/2073-445X/11/8/1159land evolutionlandscapefood securitysouthern Sanjiang Plain of China |
| spellingShingle | Tao Pan Ru Zhang Spatiotemporal Heterogeneity Monitoring of Cropland Evolution and Its Impact on Grain Production Changes in the Southern Sanjiang Plain of Northeast China Land land evolution landscape food security southern Sanjiang Plain of China |
| title | Spatiotemporal Heterogeneity Monitoring of Cropland Evolution and Its Impact on Grain Production Changes in the Southern Sanjiang Plain of Northeast China |
| title_full | Spatiotemporal Heterogeneity Monitoring of Cropland Evolution and Its Impact on Grain Production Changes in the Southern Sanjiang Plain of Northeast China |
| title_fullStr | Spatiotemporal Heterogeneity Monitoring of Cropland Evolution and Its Impact on Grain Production Changes in the Southern Sanjiang Plain of Northeast China |
| title_full_unstemmed | Spatiotemporal Heterogeneity Monitoring of Cropland Evolution and Its Impact on Grain Production Changes in the Southern Sanjiang Plain of Northeast China |
| title_short | Spatiotemporal Heterogeneity Monitoring of Cropland Evolution and Its Impact on Grain Production Changes in the Southern Sanjiang Plain of Northeast China |
| title_sort | spatiotemporal heterogeneity monitoring of cropland evolution and its impact on grain production changes in the southern sanjiang plain of northeast china |
| topic | land evolution landscape food security southern Sanjiang Plain of China |
| url | https://www.mdpi.com/2073-445X/11/8/1159 |
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