JOURNAL OF NATURAL RESOURCES ›› 2019, Vol. 34 ›› Issue (7): 1471-1482.doi: 10.31497/zrzyxb.20190710

• Resource Economics • Previous Articles     Next Articles

Spatial-temporal coupling relationship between chemical fertilizer application and grain yield in China at city scale

ZHAO Xue-yan, LIU Jiang-hua, WANG Rong, WANG Xiao-qi   

  1. College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, China
  • Received:2018-12-25 Online:2019-07-28 Published:2019-07-28

Abstract: Fertilizer application is viewed as a double-edged sword, for it can increase grain production and ensures food security, at the same time, it can lead to degradation of eco-environment. At present, it is urgent to explore the spatial-temporal coupling relationship between fertilizer application and grain production, so as to provide effective measures and references to maintain food security and ecological safety. Selecting 336 administrative regions at the prefecture level as study units, the paper analyzes the changing features of China's grain production and fertilizer application in the spatial-temporal pattern, and the coupling relationship between fertilizer application and grain production as well as its dynamic process from 2005 to 2015. The findings are obtained as follows. (1) Both fertilizer application and grain production showed upward trends from 2005 to 2015, and regional differences in fertilizer application presents a decreasing trend from "main production areas, production-and-sales balancing areas to main sales areas". Meanwhile, the overall trend of grain production among different regions tends to increase from "main production areas, production-and-sales balancing areas to main sales areas". (2) Fertilizer application roughly presents a stepwise increase from "East-Centre-West", while grain production growth apparently shows north-south differential characteristics. (3) From the perspective of spatial distribution, the areas east of Aihui-Tengchong line were featured as "double-high areas" compared with "double-low areas" west of the line; moreover, "inefficiently-fertilized" areas were shrinking and "other-factor-influenced" areas expanding. (4) In the course, the coupling relationship between grain and fertilizer was dominated by "double-increase type" with other types positioning secondarily; and the relationship was mainly transforming towards "double-increase type" and "other-factors-affected type".

Key words: fertilizer application, grain output, coupling relationship, temporal and spatial pattern, China