| 摘要: |
| ［目的］东北三省是我国大豆生产的重要基地，也是国家种植结构调整的重点区域。研究分析了1980—2010年东北三省大豆时空演变特征，为合理制定种植结构调整政策、加快推进农业供给侧结构性改革提供科学的空间信息参考。［方法］综合卫星遥感技术和空间信息重构模型优势，基于交叉信息熵方法，构建了作物空间信息重构模型SPAM China，对1980—2010年东北三省大豆种植空间分布、时空演变、重心迁移等进行了研究。［结果］1980—2010年东北三省大豆种植区域小幅增加，大豆种植面积栅格数量从6 703个增加至7 214个，松嫩平原、三江平原以及吉林省中部地区是东北三省的大豆主产区； 种植面积大幅增加，单位栅格面积增加1 000hm2以上的栅格数量增加明显，面积增加区域主要位于北纬47°~50°之间和东经1255°~131°之间； 东北三省大豆种植面积重心分别向东迁移10620km，向北迁移20857km，辽宁省、吉林省大豆种植面积重心南移，黑龙江省基本保持不变。［结论］1980—2010年东北三省大豆种植面积空间分布小幅增加，但时空变化特征显著，种植面积重心向北向东迁移。 |
| 关键词: 东北三省大豆交叉信息熵时空演变重构 |
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| A STUDY ON SPATIO TEMPORAL CHANGE OF SOYBEANS DISTRIBUTION IN NORTHEAST CHINA USING A CROSS ENTROPY METHOD |
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Tang Pengqin1, Chen Zhongxin1, Liu Zhenhuan2, Yang Peng1, Yao Yanmin1
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1.Key Laboratory of Agricultural Remote Sensing, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China;2.Guangdong Provincial Key Laboratory of Urbanization and Geosimulation, School of Geography and Planning Sun Yatsen University, Guangzhou,Guangdong 510275, China
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| Abstract: |
| Northeast region is an important soybeans production base and region where agricultural planting structure needs to be adjusted. This study analyzed spatio temporal change characteristics of soybeans in Northeast China during 1980 2010 so as to provide scientific guidance on making decisions for crop planting structure adjustment and supply side structural reform. By taking account of advantages of remote sensing technique and spatial information model, a crop spatial information allocation model (SPAM China) was developed based on cross entropy theory, and then spatial distributions of soybeans, spatio temporal change, crop center movement were investigated. During 1980-2010, soybeans planting area in Northeast China slightly increased and the number of soybeans girds increased from 6 703 to 7 214. Songnen plain, Sanjiang plain, Central Jilin province are the main soybeans production regions. The planting area had increased significantly, and the number of grids with a grid area of more than 1 000 hm2 had increased significantly. Soybeans area was increased between 47 to 50 degrees north latitude and 125.5 to 131 degrees east longitude; The gravity center of soybeans was moving to the east by 106.20 kilometers and to the north by 208.57 kilometers, among which those of Liaoning and Jilin provinces were moving north and Heilongjing kept relatively stable. During 1980-2010, there was a minor increase for sobyeans planting area in Northeast China but significant spatio temporal change. The gravity of center of soybeans planting area was moving northeast. |
| Key words: Northeast China Soybeans the minimum cross entropy spatio temporal change adjustment |
