Analysis And Evaluation Of Energy Input Structure Of Agricultural Ecosystem In Shouguang City

In an ecosystem,energy flow and material cycle are its basic functional processes,and the material cycle of the ecosystem is accompanied by the flow,transformation and storage of energy.The analysis of the energy input structure of the ecosystem refers to the analysis of the nature,classification and input of the energy value of the ecosystem by using the energy value analysis method and using solar energy(sej)as the standard to measure the energy of different properties.In this study can value theory and energy method,on the basis of study of Shouguang in 2015 ～ 2019 of the structure of agricultural ecosystem emergy,as well as its dynamic and change over time,the analysis of the structure of the system,emergy development trends and track,explore the problems existing in the development and the reasons,put forward to promote Shouguang agricultural ecosystem sustainable development countermeasures and Suggestions.The results are as follows:(1)In Shouguang agricultural ecosystem,the energy value from outside the system accounts for less than 1/3 in the total input energy value every year,while the energy value from within the system accounts for 2/3.This indicates that the agricultural ecosystem in Shouguang city is still in a self-sustaining state,and the system has a strong closed-off and conservative character.(2)In the analysis of energy input structure of agricultural ecosystem in Shouguang city,it was found that there were three problems.First,the structure of industrial auxiliary energy and organic energy investment is not reasonable,and too much organic energy value investment means that the system has little investment in science and technology and lacks vitality.Second,the industrial auxiliary energy of the internal input energy structure imbalance,fertilizer input too much.Third,the internal energy input structure of organic energy value is unbalanced,labor input is too much,and production mode is closed.(3)Countermeasures and Suggestions for the sustainable development of Shouguang agricultural ecosystem mainly include improving farmers’ quality,establishing agricultural technology popularization team and farmers’ training base,and increasing scientific and technological input.In addition,it should promote the value-added of agricultural products,improve the output of energy value,lengthen the industrial chain,solve the employmentproblem of surplus rural labor force,improve the enthusiasm of farmers,increase production and income.Organic fertilizer source,reduce fertilizer use,set up according to the actual situation to develop biological and engineering measures,etc.,to promote new greener fertilization technology,popularize environmental protection idea,encourage farmers to use organic fertilizer,to reasonable planning of livestock breeding areas,improve the utilization rate of livestock and poultry excrement and promotion of straw returned and biological control technology,gradually reduce the use of pesticides and fertilizers.At the same time,we should develop water-saving agriculture and improve the utilization rate of water,fertilizer and medicine.There is also a need to step up research and development of improved varieties.