Evaluation Of Cultivated Land Ecological Security In Zaozhuang City

Cultivated land is an essential part of human existence of scarce resources,since the 21 st century,the growing population,cultivated land decreasing number of humans with the growing demand for food,for cultivated land demand and investment are increasing,lead to the cultivated land ecological environment increasingly serious damage,soil erosion and fertility decline,biodiversity decrease,and so on phenomena show that the cultivated land ecosystem is unbalanced.Therefore,this paper comprehensively evaluates the ecological security of cultivated land and analyzes the main obstacle factors,and puts forward suggestions and measures to improve the quality of cultivated land and gradually restore the cultivated land ecosystem.In this study as the study area of Zaozhuang,1998-2017 as the research period,based on PSR model,three aspects from the pressure,state and response,select 25 indicators to construct regional cultivated land ecological security evaluation index system,using the entropy weight method and analytic hierarchy process(ahp)and index weight respectively are combined empowerment,using the improved TOPSIS model for comprehensive evaluation of cultivated land ecological security situation analys is,using degree model selection and determine the key factors affecting ecological security.At the same time,the prediction model is used to predict the ecological security level of cultivated land in Zaozhuang city from 2018 to 2022,and the improvement method is discussed based on the above research.Results showed that the cultivated land ecological security level of Zaozhuang in 20 years has been in a critical state,degree,up from 0.4512 in 1998 to 0.5222 in 2017,from 1998 to 2017 the cultivated land ecological security pressure system of Zaozhuang degree from 0.3 to 0.7,rose to 0.3693 in 1998 from 0.5603 in 2017,the entire pressure system showed a trend of greater volatility,the dangerous state to turn into a critical state.The closeness degree of the response system increased rapidly,and the pressure system and the status system had a negative effect on the ecolo gical security level of cultivated land.From 1998 to 2017,the closeness degree of the status system showed a downward trend of fluctuation,from 0.5432 in 1998 to0.3997 in 2017,a decline of 26 percentage points,from the critical state to the dangerous state.The change of the main obstacle factors in the past 20 years was determined,which gradually changed from the ecological security value of cultivated land and percapita cultivated land area to industrial pollution and water and soil coordination degree.The prediction results show that the level of cultivated land ecological security is on the rise,but it is still in a critical state of safety,and there is a certain distance from safety.Therefore,Suggestions are put forward according to local conditions: to enhance the awareness of cultivated land ecological protection;To raise the level of agricultural modernization;We will actively implement the policy of cutting overcapacity.To increase farmers' income;To improve the level of agricultural industrialization;Soil conservation;Promoting water and soil coordination;We will improve the environmental protection system.