| "Energy barriers" problem has long been plagued by the economic system and ecological system of experts,in order to solve this problem,H.T.O dum energy analysis method is proposed and the theory of emergy analysis,quantitative evaluation standard,unified the ecosystem planting industry plays an important role in national economy.Planting industry product occupies the important position in agricultural products,people has a close relationship with food safety problems.Hunan province farming products production about half of the total output value of agriculture,so keep planting industry healthy and stable development,to guarantee the people life is stable,is of great significance to maintain social stability development.Taking Hunan province as an example,based on the 10 years from 2008 to 2015 in Hunan province farming related statistical data,the ecosystem can value analysis model and time series analysis method,constructs the index system of Hunan province farming ecological system in the evaluation and analysis of the various indicators of emergy index system and discusses the sustainable development of the planting ecosystem in Hunan province,and puts forward related suggestions,the main research conclusion is as follows:(1)Using the emergy analysis method,the scientific measurement of Hunan province in 2008-2015 crop ecosystem emergy input and output.Hunan province from 2008 to 2015 the total amount of planting ecosystem emergy in turn 5.58 e+22 sej,5.59E+22sej,6.86E+22sej,6.34E+22sej,5.39E+22sej,6.54E+22sej.environmental resources value accounted for the total to 36.22%-51.69%,that of water,heat resource in Hunan province is relatively abundant,for crop production provides superior natural environment conditions;Planting ecosystem from 2008 to 2015 in Hunan province to total output value of 3.11 e+23 sej,3.08 e+23 sej,3.25 e+23 sej,3.37E+23sej,3.55E+23sej,3.50E+23sej,3.68E+23sej,3.80E+23sej.Hunan province farming mainly rice and vegetables,the sum of the two crops can value output accounted for 72.14%of all energy-87.37%.Crops can output value increased year by year,show that the crop production in Hunan province is also increasing year by year.(2)Constructing the index system of Hunan province farming ecological system in selecting energy self-sufficiency,ratio of industrial auxiliary energy,organic auxiliary energy ratio,per capita energy consumption,energy density,energy purchase rate,energy investment,net emergy output,environmental load rate and energy sustainable development indicators.Among them,the planting industry system of Hunan province's energy self-sufficiency in 53%to 65%range,the fluctuation is not big,that is relatively rich in the natural resource in Hunan province;Crop production in Hunan province purchase rate is 35%-47%,ecological system in Hunan province farming industry auxiliary can be worth less than their organic auxiliary energy,mostly belongs to the labor-intensive industries in Hunan province,later want to notice to mechanization development;The energy of the planting ecosystem in Hunan province investment rate between 0.54 to 0.71,the purchase of the farming ecological economic system of Hunan province can value a serious shortage of inputs,planting in the operation of the ecological economic system mainly rely on the local environment resources;Hunan province farming ecosystem net emergy output of 4.73-6.07,shows that Hunan province farming system can output value after removal of compensation can purchase value,the energy of the system to output still has a lot of,can value profit space is larger;Hunan province farming ecological economic system of environmental load rate is between 0.93 to 1.76,are less than the United States,Italy,Japan,Sweden and Spain.Show that Hunan province farming ecological economic system also has certain environmental load space;Hunan province sustainable farming ecological system in 3.74 5.06.Hunan province farming ecological system dynamic and development potential,good system development state.(3)By building the grey forecast model GM(1,1),in Hunan province between 2016-2023 crop ecosystem sustainable development is forecasted.,forecast for 8 years in Hunan province farming ecosystem sustainable development coefficient value of 3.0879,2.9379,4.0579,3.6079,2.7379,3.6679,2.7379 and 3.6679,shows that planting ecosystem in Hunan province is in good condition,has good development potential and vitality.The future planting ecosystem sustainable development of Hunan province should take the following measures:(1)to establish agricultural planting form a complete set of scientific system;(2)control in rural population,improve the rural population quality,cultivating new farmers;(3)to promote land consolidation and soil fertility. |
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