Establishment And Application Of Emergy Input-Output Model For Agricultural Ecosystem

Agriculture provides the basic guarantee for human survival and supports the continuous development and progress of the entire national economy.In recent decades,with the continuous growth of economy and demand,agricultural development is facing the threat and harm of ecological environment problems.Soil erosion,soil hardening,agricultural pollution and other issues have seriously affected the production function and sustainable development ability of agricultural system.This is also one of the backgrounds of the country’s strategy of rural revitalization,and rural ecological revitalization is imminent.Rural ecological problems are mainly caused by unreasonable input structure and mode of production of agricultural factors.Based on this,this paper takes the agricultural ecosystem of Zouma Street Town in Shuangfeng County as the research object,takes the rural ecological problems as the research angle,uses the eco-economic analysis method,combines the physical input-output model with the emergy theory method,constructs the agricultural emergy input-output model,and invests in the agricultural ecosystem of Zouma Street Town in Shuangfeng County on the basis of fully collecting data and data.Input and output are studied.The main results are as follows:(1)The direct coefficient of agricultural emergy consumption and the complete coefficient of agricultural emergy consumption in Zouma street agricultural ecosystem indicate that there is an economic value dependence among its planting products,animal husbandry products,fishery products and agricultural by-products.However,the emergy input of planting products,animal husbandry products,fishery products and agricultural by-products to forestry products is less.Among them,planting products,animal husbandry and fishery products are most dependent on agricultural by-products.It can be seen that the emergy output of each department mainly depends on the input of agricultural by-products straw.(2)The direct consumption coefficient of industrial auxiliary emergy value and the total consumption coefficient of emery value of agricultural ecosystem in Zouma street town indicate that:the input of fertilizer and feed has the biggest influence on the output of emergy value of agricultural products.Its main function is to promote the total output of various products.Each product consumes very little of the agricultural machinery.We can see that in the production process of each product less investment in agricultural machinery.This means that the production of every product in the agricultural system of Zouma street town is in a state of high input and high pollution.(3)The direct consumption coefficient and the complete consumption coefficient of the organic emergy value in the agricultural ecosystem of Zouma street town indicate:farming,animal husbandry,forestry and fishing all depend heavily on Labour.For organic fertilizer,animal power,grass and other organic energy consumption is very small.We can know that the production of every product in the agricultural system of Zouma street town is in the mode of extensive development.Production mainly depends on manual labour.(4)The countermeasures of rural ecological development in Zouma Street Town are as follows:Improve straw utilization and rational utilization of straw;Adjustment of input ratio of fertilizer,concentrate and labour,improve the efficiency of agricultural systems;Adjust measures to local-conditions and develop characteristic industries;Promote the development of leisure tourism experience agriculture.