Acta Geographica Sinica ›› 2014, Vol. 69 ›› Issue (3): 353-364.doi: 10.11821/dlxb201403007

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Spatiotemporal changes of maize sown area and yield in Northeast China between 1980 and 2010 using spatial production allocation model

TAN Jieyang1, LI Zhengguo1, YANG Peng1, LIU Zhenhuan2, LI Zhipeng1, ZHANG Li1, WU Wenbin1, YOU Liangzhi3, TANG Huajun1   

  1. 1. Key Laboratory of Agri-informatics, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
    2. Geography and Planning School of Sun Yat-sen University, Guangzhou 510275, China;
    3. Environment and Production Technology Division, International Food Policy Research Institute, 2033K Street, NW, Washington, DC 20006, USA
  • Received:2013-07-26 Revised:2013-11-20 Online:2014-03-20 Published:2014-03-20
  • Supported by:
    National Natural Science Foundation of China,No.41171328;No.41201184,No.40930101;National Basic Program of China,No.2010CB951502

Abstract: Understanding crop patterns and their changes on a large scale is a critical requirement for projecting agro-ecosystem dynamics. However, tools and methods for analyzing crop sown area and yield on spatiotemporal variations are still insufficient currently. By the use of cross-entropy method, a Spatial Production Allocation Model (SPAM) was developed. Combined with geographic spatiotemporal analysis methods, a case study was further presented to analyze the spatial characteristics of maize sown area and yield in Northeast China during 1980-2010 within 5' × 5' grid cells. The results indicated the following: (1) Maize sown area mainly expanded northwards during 1980-2000 (located at 44° N-48° N) and then concentrated at central and southern in Northeast China on latitudinal variations in the following years. Also it moved eastwards (located at 123°E to 127°E) and lower elevation (below 100m) as well as higher elevation (mainly from 200 m to 350 m) region on longitudinal and altitudinal variations, respectively. (2) Maize yield which has been improved largely mainly located at 42°N to 48°N and concentrated at the region below the altitude of 350 m on latitudinal and altitudinal variations, respectively, while its increase is relatively homogeneous on longitudinal variations. (3) Additionally, dominant maize proportion on a pixel scale has developed to middle-high proportion gradually during 1980-2010, and maize yield located at the pixel of middle-high proportion seems higher, which reflected the trends of agglomeration and large-scale development of maize cultivation driven by market economy.

Key words: Northeast China, spring maize, spatiotemporal changes, spatial production allocation model