Spatial variation evaluation of cultivated land quality from the perspective of crop rotation for a typical lateritic red soil farming area in south China
Characterizing the spatial variation of cultivated land quality based on crop rotation pattern could provide a basis for improving regional cultivated land quality through optimizing crop rotation management. To this end, we constructed a crop rotation system classification for the typical lateritic...
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| Autores principales: | , , , , |
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| Formato: | article |
| Lenguaje: | ZH |
| Publicado: |
Agro-Environmental Protection Institute, Ministry of Agriculture
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/76250cf08fbd4ae384f659229e47750e |
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| Sumario: | Characterizing the spatial variation of cultivated land quality based on crop rotation pattern could provide a basis for improving regional cultivated land quality through optimizing crop rotation management. To this end, we constructed a crop rotation system classification for the typical lateritic red soil farming area in south China, and established the correlation between crop rotation systems and the cultivated land quality based on spatial analysis, literature review, field survey, farmer interview and expert knowledge. Then crop rotation systems were mapped with Sentinel-1 and Sentinel-2 time series remote sensing data and the decision tree algorithm, based on which the spatial variation and pattern of cultivated land quality were analyzed at different scales. The results showed that there was a qualitative correlation between crop rotation systems and cultivated land quality. In general, the quality is generally higher in paddy rotation systems due to lower fertilizer input, less soil disturbance, and long-term water surface, while the quality was generally lower in vegetable and orchard systems due to higher fertilizer input, which caused soil acidification and soil heavy metal pollution. The highest proportion of vegetable rotation systems in the study area was followed by orchard systems. Therefore, the overall cultivated land quality is general, mainly characterized by the third class. Spatially, the cultivated land quality was higher in the north and lower in the south. Our study initially explored the correlation between crop rotation and cultivated land quality, and applied the remote sensing-based crop rotation pattern to the analysis of spatial variation in cultivated land quality. In the future, it is necessary to deeply analyze the correlation between crop rotation, topography, meteorology and hydrology and cultivated land quality, and further build a big data-driven technical system for assessing the spatial and temporal variations of cultivated land quality to support the cross-scale cultivated land quality monitoring and evaluation. |
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