Study On The Evaluation Of Cultivated Land Ecological Security In Lindian County

Natural resources provide the material and space for human beings to survive,develop and enjoy.As the basic resources in natural resources,land resources are irreplaceable and l imited.It has a very important impact on national food production,national economic development and ecological environment.At present,with the increase of population density,the acceleration of urbanization and industrialization in China,the problems of resource shortage and resource destruction are gradually emerging.The ecological security of cultivated land is one of them.This problem has a considerable relationship with the unreasonable use of cultivated land by human beings,so it is very important to study the ecological security of cultivated land.In order to study the ecological security of cultivated land comprehensively,we need to make a multi-level analysis around the basic characteristics and attributes of the cultivated land ecosystem,as well as the impact of human social and economic activities on the ecological environment of cultivated land,deeply understand the concept connotation of cultivated land resource security,cultivated land ecological security and cultivated land ecological security evaluation,and redefine the research significance of cultivated land ecological security.Understand the current situation of cultivated land resources,and ultimately realize that the quantity and quality of cultivated land resources will not be reduced,so as to promote the efficient use of cultivated land and ensure food security.Lindian County,as an agricultural county,attaches importance to the ecological security of cultivated land,that is,food security.This paper takes Lindian Cou nty as the research area.Lindian county includes eight towns.Based on the theory of resource scarcity,the theory of diminishing land returns,the theory of human land relationship,and the theory of sustainable development,12 indicators that can reflect the ecological security of cultivated land in Lindian county are selected,using the analytic hierarchy process and entropy method Calculate the weight value of each index,calculate the final weight of the index through the combination weighting method,combine the calculation index table and Arc GIS technology,analyze quantitatively and qualitatively the ecological security situation of cultivated land in every township of Lindian County in 2015 and 2018,and carry out time change analysis and space cha nge comparative analysis,and put forward scientific and systematic measures for the problems of ecological security of cultivated land in Lindian county Suggestions and countermeasures.Therefore,it is an important step to study the ecological security of cultivated land in Lindian County,and it is also a problem that needs to be studied seriously to realize the agricultural modernization.Through the research,the main conclusions are as follows: the results of comprehensive evaluation of cultivated land ecological security,from 2009 to 2018,the cultivated land ecological security index of Lindian county increased in Hongqi Town,Heming Lake Town,Huayuan Town,Dongxing Township,Hongwei Township and Sihe Township,the index decreased in Lindian town and Sijiqing Town,and the cultivated land ecological security level of Lindian county increased in Heming Lake Town,Huayuan Town,Dongxing Township and Hongwei township Sihe Township,including heminghu Town,Huayuan Town,Dongxing town and Hongwei Town,has been upgraded to safety;Sihe township has been upgraded from basic safety to safety,with Lindian town and Hongqi Town unchanged,while Sijiqing town has been reduced to safety.From the perspective of time change characteristics,the change of ecolo gical security of cultivated land in Lindian County in 2009-2018 is generally in a good direction.Among them,from 2009 to 2015,the cultivated land ecological security index decreased in Lindian Town,heminghu Town,Dongxing Township,Hongwei Township and Sihe Township,with the change values of-0.1269,-0.0204,-0.0382,-0.0429 and-0.0351 respectively;the cultivated land ecological security index increased in Huayuan town and Sijiqing Town,with the change values of 0.0946 and 0.1104 respectively.From 2015 to 2018,the ecological security index of cultivated land decreased only in Sijiqing Town,with a change value of-0.2325;the ecological security index of cultivated land increased in Lindian Town,Hongqi Town,heminghu Town,Huayuan Town,Dongxing Township,Hongwei Township and Sihe Township,with a change value of 0.0664,0.0835,0.0403,0.0501,0.2289,0.1462 and 0.1893,respectively.From the perspective of spatial change characteristics,according to the index analysis in 2018,the ecological security level of cultivated land in 8 towns of Lindian county is relatively stable,but there are still spatial differences in some areas.The security index in the Northwest(heminghu town)is higher,the security index in the middle(Lindian town)is the lowest,and that in other areas(Hongqi Town,Sijiqing Town,Huayuan Town,Hongwei Township,Dongxing Township,Sihe township)The safety index is in the middle range.According to the problems existing in the ecological security of cultivated land in Lindian County,in order to improve the ecological security index of cultivated land in Lindian county and further improve the agricultural output,we should ensure the quantity of cultivated land resources,improve the quality of cultivated land resources,establish a perfect monitoring and supervision platform,improve the rules and regulations of cultivated land protection,enhance the awareness of cultivated land protection,strengthen the intensive use of cultivated land,and optimize the adjustment The agricultural production structure of the whole county is to plant economic crops according to the local actual situation,advocate scientific and technological agriculture,realize modern agriculture,pay attention to the ecological balance of cultivated land,and ensure the sustainable development of cultivated land.