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[1]LIU Mengzhu,ZHANG Hongjuan,REN Heyu,et al.Spatiotemporal Variations of the Soil Conservation in the Agro-pastoral Ecotone of Northern China Under Grain for Green Program[J].Research of Soil and Water Conservation,2021,28(05):172-178.

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Spatiotemporal Variations of the Soil Conservation in the Agro-pastoral Ecotone of Northern China Under Grain for Green Program

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 05 Page number: 172-178 Column: Public date: 2021-08-20

Title:: Spatiotemporal Variations of the Soil Conservation in the Agro-pastoral Ecotone of Northern China Under Grain for Green Program

Author(s):: LIU Mengzhu^1,2,ZHANG Hongjuan^1,2,REN Heyu^1,2,PEI Hongwei^1,2; (1.Department of Municipal and Environmental Engineering,Hebei University of Architecture,Zhangjiakou,Hebei 075000,China; 2.Hebei Key Laboratory of Water Quality Engineering and Comprehensive Utilization of Water Resources,Zhangjiakou,Hebei 075000,China)

Keywords:: agro-pastoral ecotone of northern China; soil conservation; InVEST model; Grain for Green Program

CLC:: X171; X820.4

DOI:: -

Abstract:: Understanding and assessing spatiotemporal changes of the soil conservation is critical for the next round of GFGP(Grain for Green Program)implementation. Based on this,through the datasets of land use,soil,rainfall and DEM of the agro-pastoral ecotone of northern China(AENC)in recent two decades,soil conservation and its variations in views of the quantity,slope,and distribution were estimated using InVEST model. We focused on analyzing the impact of the GFGP implementation on the soil conservation function in the AENC. The results indicated the followings.(1)From 2000 to 2018,the total soil conservation increased from 2.147 6×10¹⁰ tons to 2.149 3×10¹⁰ tons with an increase of 0.356 tons/hm².(2)The soil conservation function of woodland and grassland performed best,and soil conservation reached 863.62 tons/hm² and 520.39 tons/hm²,respectively. Specifically,the average soil conservation increased significantly with the increase of slope. Meanwhile,the soil conservation showed a distribution of high level in southeast and low level in southwest;(3)The increase of soil conservation in GFGP area accounted for approximately 60%(1 014.50 tons)of the total increment. Generally,GFGP played a crucial role in the improvement of soil conservation function in the AENC,and woodland and grassland contributed the most.

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Last Update: 2021-08-20