新型城镇化视角下新疆土地生态安全预警演变与障碍因子诊断OACSTPCD

Taking Xinjiang and its 14 prefectures and cities as the study area,this paper analyzes the early warning of land ecological security in Xinjiang from 2010 to 2020 and the changes in the spatial pattern of each prefecture by constructing a PSR model and combining GIS software,and uses the obstacle degree model to diagnose the main obstacle factors affecting the improvement of land ecological security and the healthy development of cities in Xinjiang.The results show that:(1)During the study period,the ecological security status showed an upward trend and gradually developed in a stable direction,with the early warning index increasing from 0.3718 in 2010 to 0.4985 in 2020,and the land ecological security level reached critical security and the early warning degree decreased.(2)The spatial pattern of early warning of land ecological security in Xinjiang is quite different,showing the characteristics of lower in the east and higher in the west.(3)A number of obstacle factors affect the land ecological security in Xinjiang,among which per capita food occupancy(30.94%),population density(13.33%),multiple cropping index(12.87%),urbanization rate(12.79%),and chemical fertilizer application intensity(10.46%)are the main obstacle factors in recent years.we should continue to pay attention to the problem of food security in Xinjiang,guide the scientific and rational layout of urban population and space,coordinate the contradiction between urban development and ecological environment,and adhere to the priority of green development and ecology.The results of this study are expected to provide some suggestions and decision-making references for improving the land ecological security in Xinjiang,ensuring food security in Xinjiang,and promoting new urbanization and the healthy and sustainable development of land resources.