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[1]LI Mingwei,CHEN Weiqiang,YUN Yuhan,et al.Evaluation on Farmland Ecological Security in Henan Province Based on Projection Pursuit Model[J].Research of Soil and Water Conservation,2018,25(04):257-263,269.

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Evaluation on Farmland Ecological Security in Henan Province Based on Projection Pursuit Model

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 04 Page number: 257-263,269 Column: Public date: 2018-06-13

Title:: Evaluation on Farmland Ecological Security in Henan Province Based on Projection Pursuit Model

Author(s):: LI Mingwei, CHEN Weiqiang, YUN Yuhan, MA Yuehong, GUO Ruirui; College of Resources and Environment, He’nan Agricultural University, Zhengzhou 450000, China

Keywords:: ecological security of cultivated land; PSR model; projection pursuit model; Henan Province

CLC:: F323.21;X826

DOI:: -

Abstract:: The ecological security of cultivated land is related to grain crops, social stability and sustainable development of economy and society. The ecological security status of cultivated land in Henan Province during 2006—2015 was analyzed and evaluated from the perspective of time and space, which could provide the basis for guiding the rational and sustainable utilization of cultivated land. The evaluation index system of cultivated land ecological security was constructed by using PSR model, and the projection pursuit model with higher accuracy was used to calculate the evaluation index. The results were as follows. (1) The per capita arable land area, chemical fertilizer load of the unit cultivated land area, the first industry accounted for the proportion of GDP, land reclamation rate index, the level of urbanization have become the main influencing factors on cultivated land ecological security in Henan Province. (2) During the study period, the comprehensive evaluation of the ecological security of cultivated land in Henan increased from 0.893 7 to 0.941 9, showing a ‘rapid rise-slow decline-rising volatility’ stage of development. (3) According to the variation of comprehensive evaluation of land ecological security value, the 18 evaluation units can be divided into three types including rapid rise level area, slow rise level area and basic stability level area in time dimension, and five types including security level, good level, sensitive level, risk level, risk level in space dimension. (4) During 2006-2015, in addition to Zhengzhou City, the other cities were on the rise on the ecological security evaluation of farmland, the level of urbanization, per capita arable land area, the first industry accounted for the proportion of GDP, the density of population have become the main influencing factors on cultivated land ecological security in Zhengzhou City.

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