Evaluation of land ecological security in Karst area based on evolutionary PSR model：A case study of Yongfu county,Guangxi

doi:10.14088/j.cnki.issn0439-8114.2021.09.032

Abstract

Abstract: Taking Yongfu county as research object, the evaluation index system was constructed based on the evolutionary PSR model and the framework of EES and PRED models. The weight of indexes was determined by entropy method and coefficient of variation method, and the change trend of land ecological security was analyzed by comprehensive index method, and the influencing factors were explored by grey correlation method. The results show that the land ecological security level of Yongfu county is on the whole on the rise from 2006 to 2018, and the safety level is changing from less safe to more safe. The comprehensive score of land ecological security fluctuates greatly from 2006 to 2010, and it is on the whole on the rise from 2010 to 2018. The safety index of each subsystem is generally fluctuating and rising, but it has been in a state of insecurity and less security. Population pressure, economic pressure, environmental pressure and resource state are the main factors affecting the level of land ecological security.

Key words: land ecological security evaluation, PSR model, influence factor, Karst area, Yongfu county

CLC Number:

F301
X826

YANG Chang-ming, LU Ru-cheng, LIN Shu-gao. Evaluation of land ecological security in Karst area based on evolutionary PSR model：A case study of Yongfu county,Guangxi[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(9): 157-163.

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