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Spatio-temporal dynamics of maize cropping system in Northeast China between 1980 and 2010 by using spatial production allocation model

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文摘 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.
来源 Journal of Geographical Sciences ,2014,24(3):397-410 【核心库】
DOI 10.1007/s11442-014-1096-0
关键词 spring maize ; spatial production allocation model ; spatio-temporal pattern ; Northeast China
地址

1. Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Key Laboratory of Agri-informatics, Ministry of Agriculture, Beijing, 100081  

2. Geography and Planning School of Sun Yat-sen University, Guangzhou, 510275  

3. Environment and Production Technology Division, International Food Policy Research Institute, USA, Washington, 20006

语种 英文
文献类型 研究性论文
ISSN 1009-637X
学科 农作物
基金 国家自然科学基金 ;  National Basic Program of China
文献收藏号 CSCD:5069321

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引证文献 11 篇

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2 胡琼 农作物种植结构遥感提取研究进展 中国农业科学,2015,48(10):1900-1914
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