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[1]DENG Jun,MA Quanlai,WEI Huapeng,et al.Spatial-Temporal Evolution of Cultivated Land Resources in Huai River Basin of Henan Province from the Perspective of Food Security[J].Research of Soil and Water Conservation,2021,28(04):390-396.

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Spatial-Temporal Evolution of Cultivated Land Resources in Huai River Basin of Henan Province from the Perspective of Food Security

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 04 Page number: 390-396 Column: Public date: 2021-08-10

Title:: Spatial-Temporal Evolution of Cultivated Land Resources in Huai River Basin of Henan Province from the Perspective of Food Security

Author(s):: DENG Jun¹, MA Quanlai^2,3, WEI Huapeng^2,3, WANG Xiaoyu^2,3, YANG Chongke^2,3, ZHOU Hao⁴, ZHANG Zhengfei^2,3; (1.College of Geomatics and Geoinformation,Chongqing Vocational Institute of Engineering,Chongqing402260,China; 2.The First Institute of Resources and Environment Investigation of Henan Province,Zhengzhou450007,China; 3.Science and Technology Innovation Centre of Nature Resources of Henan Provinces/Evaluation Monitoring and Early Warning of Resource Environmental Bearing Capacity,Zhengzhou450007,China; 4.College of Resources and Environment Sciences,Hunan Normal University,Changsha410081,China)

Keywords:: food security; Huaihe River Basin; cultivated land resource; spatial-temporal evolution

CLC:: F301.21

DOI:: -

Abstract:: We systematically analyzed the characters of cultivated land resource change intensity, type and hot spots in Huai River Basin of Henan Province in 3 periods from 1990 to 2018 in order to master the temporal and spatial variation characteristics of cultivated land resources in the context of food security and strengthen its protection based on multi-temporal remote sensing data and kilometer grid evaluation unit. The results show that:(1)the cultivated land had been totally reduced by 831.01 km² from 1990 to 2018, with a decrease rate of 5.75% in Huai River Basin of He'nan Province; actually, slightly increased in 1990—2000, decreased by 837.68 km² from 2000 to 2010, and decreased by 57.52 km² from 2010 to 2018; the problem of food security caused by the continuous decrease of cultivated land in this major grain-producing area has attracted the attention of the government and academic circles, and maintaining a certain acreage of cultivated land will be the fundamental to ensure the food security;(2)influenced by national policies, such as green for grain, and the market price(the huge conversion of dry fields to paddy land driven by higher price of rice than corn), the changes of cultivated land resources were characterized by large intensity and wide range, for example, the change intensity in some area was between 35.00% and 100.00% from 2000 to 2010; the main feature of the change type was that the huge part of cultivated land was transferred into construction land, which made the situation of farmland protection more and more urgent, followed by the interactive transforms between dry fields and paddy land, cultivated land and forestland;(3)the change hotspots of cultivated land resources varied greatly in different periods, small and scattered change occurred during 1990 and 2000, concentrated and patchy distribution occurred during 2000 and 2010, and then shifting to Zhengyang County in the northwest occurred during 2010 and 2018, appearing the obvious local characteristics. Generally, this study could provide decision support for upholding the bottom line of food security, formulating regulation and control measures such as preventing the ‘non-agricultural' and ‘non-grain' behaviors, and maintaining the stability of cultivated land resources.

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Last Update: 2021-08-20