Evaluation Of Ecological Security Of Cultivated Land In Hailin City

Cultivated land is the basis for safeguarding grain quantity security and quality and safety,and is the basic material for human survival.It plays a very important role in ensuring the economic security and social stability of the country and region.As a whole,China has more people and less land,and the contradiction between human and land supply is outstanding.In the process of industrialization and urbanization in recent years,the cultivated land has been destroyed and occupied.The quantity and quality of cultivated land in China are continuously declining.In this paper,the entire city of Hailin is taken as the research object.Based on the use of the PSR model,a hierarchical analysis method is used to conduct a preliminary analysis of the ecological security of cultivated land in Hailin City to obtain system pressure,system status,and the weight of system response,and the cultivated land ecology in Hailin City.In the system,the indicator factors are selected to correspond to the system pressure,system status,and system response.The entropy method is used to determine the index weights.Finally,the combination of two weights is used to calculate the ecological security of cultivated land in Hailin City from 2011 to 2015.The comprehensive index was analyzed to arrive at the changes in the ecological security of cultivated land in Hailin City during the five years.Through analysis of the data,the indicator factors affecting the ecological security of cultivated land in Hailin City were proposed,and the 15 indicators were used to promote and weaken the ecological security of cultivated land in Hailin City.Finally,the following conclusions were drawn:The ecological security of arable land resources in Hailin City is generally on a relatively safe comprehensive index of arable land ecological security,and the comprehensive value of ecological security in the five years from 2011 to 2015 has gone through a period of rising first,then falling and then rising: the first stage is from In 2011-2012,the comprehensive value rose from the safer level of the critical safety level of 0.6081 in 2011 to the safer level of the approaching safety level of 0.7932 in 2012,with an increase of 3.04%;the second stage was from 2012-2013.The integrated value gradually decreased from a safe level of 0.7932 in 2012 to a safe level of 0.6257 in 2013,with a decline rate of 2.68%.This year,the degree of decline in the arable land ecological security in Hailin City was relatively large;the third stage was from 2013-2015.In the year,the comprehensive value gradually increased and reached the value of 0.7898 approaching the safety level in 2015.In these two years,the ecological security of cultivated land in Hailin City gradually recovered.In the indicator factors affecting cultivated land ecological security in Hailin City during the five-year period,each indicator factor has a micro-inhibitory and promoting effect on the farmland ecological safety system,and more details reflect the changes in these indicator factors will affect the arable land ecology.The impact of security.At the level of the indicator factor,the degree of government and peasants' participation and love will more intuitively affect the ecological security of cultivated land.In the past five years,the overall situation of the ecological security of cultivated land resources in Hailin City has undergone a relatively large change,but its level of security has remained unchanged at a relatively safe level as a whole,but it has changed at a relatively high level.Near the end of the security approach to the security changes,the more obvious.Hailin still faces many challenges.Along with the rapid advancement of urbanization,free use of chemical fertilizers and pesticides and environmental pollution in the surrounding areas of cities and towns will lead to a gradual decline in the quality of cultivated land resources.Ecological disasters occur from time to time,and the land fertility of cultivated land decreases.This Hailin City will return farmland to forests to restore the fertility of the land.At this time,it will also reduce the amount of arable land.The comprehensive index on the ecological security of cultivated land has been significantly changed.This study proposes corresponding countermeasures and suggestions for the problems faced by cultivated land resources in Hailin City.