Study On The Evaluation Of Cultivated Land Ecological Security In Suihua City

Cultivated land is the basis for human survival and development,and the most basic means of production in China's agricultural production.The ecological security of ara ble land is very important,it affects the safety of national crops,and even affects the strategic level of sustainable development.However,with the acceleration of urbanization and industrialization,a lot of problems such as population,resources and environment have emerged,which are related to the unreasonable use of cultivated land.Therefore,it is very important to monitor and evaluate the cultivated land ecological security.On the basis of summarizing the cultivated land ecological security res earch dynamic,around the basic characteristics of farmland ecosystem and properties,land and human social economic activities affect the ecological environment situation of multi-level analysis,deep understanding of land resources security,the cultivated land resource security and food security concept,to redefine the cultivated land ecological security research significance.And using the resource scarcity theory,theory of diminishing returns of land,land sustainable theory and based on the theory o f coordinated development and selection can reflect suihua,12 indexes of cultivated land ecological security in 2012 and 2016,suihua area over the past two years in various cities and counties in the cultivated land ecological security situation to carry on the analysis and comparison of different space time change,to reveal space-time evolution of cultivated land ecological security situation,put forward to promote suihua cultivated land ecological security countermeasure and the suggestion,provide reference for suihua protection of cultivated land resources.Through the research,the main conclusions are as follows :(1)from the overall situation,the cultivated land ecological security in suihua city,in 2012,the regions with a high index are mainly distributed in the northeast and southwest,and the central region has a low index compared with other regions.Therefore,the cultivated land ecological security index is from low to high in mingshui county,hailun city,lanxi county,qinggang county,wangkui county,qingan county,anda city,north forest region,zhaodong city and suilun county,and the cultivated land ecological security index is from 0.3150 to 0.5547.(2)from the perspective of the cultivated land ecological security in suihua in 2016,the cultivated land ecological security level of suihua is relatively high in the central region,good in the northeast and southwest regions,and low in the northwest.The cultivated land ecological security index was from low to high in mingshui county,suilun county,lanxi county,qinggang county,anda city,qingan county,wangkui county,hailun city,zhaodong city and north forest region,and the cultivated land ecological security index was from 0.3501 to 0.5759.(3)in 2012 and 2016,suihua differences between time and space analysis,suihua master this two years in various cities and counties in the cultivated land ecological security difference distribution of suihua boundary of 10 cities and counties in the cultivated land ecological security index index value are reduce the cities and counties of anda,zhaodong,qingan,suiling county,decreased cultivated land ecological security index values were respectively 0.0406,0.0024,0.0340,0.1675;The cultivated land ecological security index increased in most areas of suihua city.The cultivated land ecological security index increased in north forest region,hailun city,wangkui county,lanxi county,qinggang county and mingshui county.The added value of cultivated land ecological security index was 0.0950,0.1774,0.0730,0.0243,0.0257 and 0.0350,respectively.