Spatial-temporal Evolution of Cultivated Grain Production Capacity and Functional Zoning in Henan Province
Based on the classical statistics,spatial analysis of Geographic Information System(GIS),gravity center model,spatial autocorrelation and other model methods,this paper mainly focused on the spatial-temporal e-volution of the cultivated land grain production in 122 evaluation units in Henan Province from 2001 to 2020,and delimited the functional zoning of grain production.The main results indicated that the grain production(total out-put and average yield per unit area)increased significantly in Henan Province from 2001 to 2020.The average val-ue of total grain output and average yield per unit area in 2020 increased by 61.50%and 31.71%respectively compared with 2001,but the growth rate slowed down and the space for grain output improvement tightened.The high-yield areas of grain production had been expending from 2001 to 2020.The Eastern Henan Plain,the Northern Henan Plain and Nanyang Basin were the three core areas of grain production in space.The spatial distribution of total yield and average yield per unit area was mismatched.The construction of cultivated land quality was the key to the improvement of grain production capacity in the Eastern Henan Plain and Nanyang Basin in the future.From 2001 to 2020,the gravity center of grain production was in Yanling County,which moved 14 073 metres along the direction of 17.3° south by east,the center of gravity of grain production moved to the southeast from 2001 to 2010,and moved to the northwest slowly after 2010,and the moving distance of gravity center decreased step by step,the grain production trended to be balanced in Henan Province.The total grain production has a strong posi-tive autocorrelation in space,there are two types of high-high and low-low autocorrelation.In combination with the distribution of grain output,the primary core areas,secondary core areas,potential improvement areas and general production areas of grain production are defined.
grain productionspatial-temporal evolutiongravity center modelfunctional zoningHenan Province
NETL
NSTL
万方数据
维普
