Acta Geographica Sinica ›› 2016, Vol. 71 ›› Issue (8): 1372-1383.doi: 10.11821/dlxb201608007

• Orginal Article • Previous Articles     Next Articles

Regional pattern of grain supply and demand in China

Tian HU1(), Zhengshan JU2(), Wei ZHOU2,3   

  1. 1. School of Urban Planning and Design, Peking University, Shenzhen 518055, Guangdong, China
    2. Key Laboratory of Land Consolidation and Rehabilitation, Ministry of Land and Resources, Beijing 100035, China
    3. School of Land Science and Technology, China University of Geoscience, Beijing 100083, China
  • Received:2015-11-18 Revised:2016-04-07 Online:2016-08-25 Published:2016-08-30

Abstract:

Food security has become a worldwide concern. Considering the huge population of China, the need for food security in the country cannot be overemphasized. Grain is an important source of food for the Chinese people. Therefore, it is necessary to understand grain output and deficit situation in China. In this study, with the help of GIS and Geoda analysis methods, we constructed a relationship model of grain output and deficit to understand the structure and spatial distribution. Based on population and grain statistic data from 2008 to 2012, this study took 333 prefectures and districts as objects. The results show that grain supply and demand are currently in a net surplus situation in China. There are 160 cities that could satisfy their grain needs by cultivation of grain, accounting for 48% of all prefecture units. In reference to grain supply-demand spatial distribution, there exists obvious regional differentiation, presenting grain deficit in western China, likewise for southern regions, and grain surplus in eastern and northern regions. In addition, the regularity of scale distribution is proposed. Grain supply-demand exhibits significant spatial correlation and clustering effects at provincial and prefecture levels. And lastly, the net amount of grain surplus gradually increased from 2008 to 2012. High grain-output and high grain-deficit are the dominant transfer types. The high grain-output regions make great contributions to the growing of grain surplus, accounting for 75.24% of the increment.

Key words: grain supply and demand, spatial pattern, regional difference, spatial autocorrelation, China