| Cite this article: | 王乐,樊彦国,樊博文,等.基于高分卫星的冬小麦长势监测及驱动因素分析[J].灌溉排水学报,0,():-. |
| wangle,fanyanguo,fanbowen,et al.基于高分卫星的冬小麦长势监测及驱动因素分析[J].灌溉排水学报,0,():-. |
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| Growth Monitoring and Driving Factor Analysis of Winter Wheat Based on High-resolution Satellite |
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wangle1, fanyanguo1, fanbowen2, wangyong3
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1.School of Ocean and Space Information, China University of Petroleum (East China);2.Harbin Engineering University School of Hydroacoustic Engineering;3.Yantai Geographic Information Center
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| Abstract: |
| 【Objective】As the second largest grain crop in China, winter wheat is of positive significance to ensure food security in China. 【Method】Firstly, based on Sentinel-2 images, the spatial distribution of winter wheat planting in the study area from 2018 to 2020 was extracted by random forest method, and the growth changes of winter wheat planting in 2020, 2018 and 2019 in the rejuvenation stage, jointing stage, pregnant ear pumping stage and flowering stage were analyzed by high-resolution image extraction, and then the growth changes of winter wheat were divided into three grades of good growth, flat growth and poor growth for comparative analysis. Secondly, the monitoring results of winter wheat growth in typical years (2018) and 11 driving factors, including temperature, precipitation, slope, aspect, elevation, soil type, soil moisture, sunshine time, population density, rural labor resources and GDP, were detected by geographic detectors to quantitatively explain the reasons affecting the difference in winter wheat growth. 【Result】Compared with the growth of 3 a winter wheat, the growth of winter wheat in 2020 was better in the greening stage and the jointing stage, accounting for more than 90% of the area, while the growth was worse in the pregnant ear pumping stage, accounting for more than 20% of the area, and the growth was flat in the flowering stage, accounting for about 80% of the area. The driving factors with high explanatory power for winter wheat growth were arranged in the following order: rural labor resources> soil moisture> precipitation> temperature> sunshine time, and the interaction between the driving factors was two-factor enhancement or nonlinear enhancement. 【Conclusion】The growth change of winter wheat is a result of the interaction of complex factors by multiple factors. |
| Key words: winter wheat; area extraction; growth monitoring; geographic detector;Weishan Irrigation District |
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