农业现代化研究2017，Vol.38Issue(4)：640-648,9.DOI:10.13872/j.1000-0275.2017.0075
低地平原-水稻耕作系统水稻单产时空变化及收敛性分析
The analysis of temporal and spatial distribution changes and convergence of rice yield in lowland rice farming system
摘要
Abstract
Lowland rice farming system is an important rice producing practice in China, and rice production in this system influences regional grain output and economic development. Based on the rice yield data of 400 counties in the lowland rice farming system from 1980 to 2014 and applying the Exploratory Spatial Data Analysis (ESDA) and the Spatial Convergence method, this study analyzed the rice yield changes: examining the temporal and spatial distribution and spatial autocorrelation of county rice yields by the Descriptive and Moran Statistical methods, conducting spatial absolute β convergence test for the rice yield in this system, and conducting the spatial autocorrelation convergence test for H-H and L-L regions. Results show that the general rice yield in the system has been increasing steadily and also showed positive spatial correlation in the system from 1980 to 2014 and the spatial distance impacts on regional yields have been declining. In addition, regional yields displayed absolute β convergence to a relatively low level compared to H-H and L-L regions, and the rates of convergence of rice yields in these two regions were higher than that of the whole system. Therefore, in the H-H concentration region, measures to expand the influence radius of the core high-yield area can help increase rice yields in the surrounding areas. Minimizing the intra- and inter- yield gaps between H-H and L-L regions can enhance rice production capacity of the whole system.关键词
水稻单产/空间自相关/空间收敛/低地平原-水稻耕作系统Key words
rice yield/spatial autocorrelation analysis/spatial convergence/lowland rice farming system分类
管理科学引用本文复制引用
李晓云,刘念,曾琳琳,黄玛兰..低地平原-水稻耕作系统水稻单产时空变化及收敛性分析[J].农业现代化研究,2017,38(4):640-648,9.基金项目
国家自然科学基金项目(71673102) （71673102）
中央高校基本科研业务费专项基金(2662016PY060). National Natural Science Foundation of China (71673102) （2662016PY060）
The Fundamental Research Funds for the Central Universities (2662016PY060). （2662016PY060）
