Spatio-temporal dynamics of maize cropping system in Northeast China between 1980 and 2010 by using spatial production allocation model
查看参考文献41篇
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文摘
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Understanding crop patterns and their changes on regional scale is a critical requirement for projecting agro-ecosystem dynamics. However, tools and methods for mapping the distribution of crop area and yield are still lacking. Based on the cross-entropy theory, a spatial production allocation model (SPAM) has been developed for presenting spatio-temporal dynamics of maize cropping system in Northeast China during 1980–2010. The simulated results indicated that (1) maize sown area expanded northwards to 48°N before 2000, after that the increased sown area mainly occurred in the central and southern parts of Northeast China. Meanwhile, maize also expanded eastwards to 127°E and lower elevation (less than 100 m) as well as higher elevation (mainly distributed between 200 m and 350 m); (2) maize yield has been greatly promoted for most planted area of Northeast China, especially in the planted zone between 42°N and 48°N, while the yield increase was relatively homogeneous without obvious longitudinal variations for whole region; (3) maize planting density increased gradually to a moderately high level over the investigated period, which reflected the trend of aggregation of maize cultivation driven by market demand. |
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来源
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Journal of Geographical Sciences
,2014,24(3):397-410 【核心库】
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DOI
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10.1007/s11442-014-1096-0
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关键词
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spring maize
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spatial production allocation model
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spatio-temporal pattern
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Northeast China
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地址
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1.
Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Key Laboratory of Agri-informatics, Ministry of Agriculture, Beijing, 100081
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Geography and Planning School of Sun Yat-sen University, Guangzhou, 510275
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Environment and Production Technology Division, International Food Policy Research Institute, USA, Washington, 20006
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1009-637X |
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学科
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农作物 |
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基金
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国家自然科学基金
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National Basic Program of China
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文献收藏号
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CSCD:5069321
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41
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