Resources Science ›› 2021, Vol. 43 ›› Issue (6): 1234-1247.doi: 10.18402/resci.2021.06.14

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Climatic potential productivity and resources utilization efficiency of major grain crops in the main grain production areas of China, 1980-2019

LUO Haiping1(), ZOU Nan1, HU Xueying2, WANG Shengyun1()   

  1. 1. Research Center of Central China Economic and Social Development, Nanchang University, Nanchang 330031, China
    2. Party School of CPC of Jiangxi, Nanchang 330108, China
  • Received:2020-05-06 Revised:2020-09-21 Online:2021-06-25 Published:2021-08-25
  • Contact: WANG Shengyun

Abstract:

Food production has been increasingly threatened by the frequent occurrences of global extreme climate. Under this background, it is of great significance to realize the efficient and sustainable utilization of agricultural climatic resources. The main grain production areas in China are a core region for food security of the country. This study empirically calculated maize, rice, and wheat crop climatic potential productivities in the main grain production areas of China from 1980 to 2019 by using step-correcting mechanism model, and analyzed the spatial and temporal dynamics of actual production level and climatic potential productivity in 186 cities in these areas by using a gravity center shift model. It also comprehensively assessed agricultural climatic resources utilization efficiency at the city scale. Important results are as follows: (1) Tendency rate of maize, rice, and wheat crop climatic potential productivity in the main grain production areas of China from 1980 to 2019 was -156.80 kg/(hm2·10 a), 68.82 kg/(hm2·10 a), and 121.92 kg/(hm2·10 a) respectively. (2) Spatial change of climatic potential productivity showed three characteristics higher and lower maize climatic potential productivity areas both narrowed; spatial structure of rice climatic potential productivity basically remained unchanged; and higher wheat climatic potential productivity area enlarged. (3) Gravity centers of actual production level and climatic potential productivity changed in the same direction and the distance of migration of climatic potential productivity gravity center was shorter than that of actual production level. (4) Agricultural climatic resources utilization efficiency was higher in the agricultural areas of the North China Plain, Northeast China, and Southwest China, and agricultural climatic resources utilization efficiency was lower in the agricultural area of the Lower Yangtze Region. Therefore, it is necessary to adjust the focus of grain production. The utilization efficiency of climatic resources in the main grain producing areas can be comprehensively improved by alleviating the pressure of grain production in areas with poor climatic conditions, and tapping the climatic potential productivity of areas with rich climatic resources.

Key words: climatic potential productivity, main grain production areas of China, agricultural climatic resources utilization efficiency, migration of gravity center, grain crops, mechanism method