| Energy evaluation of theory and research methods to ecosystems and human activitiespioneering a new way of quantitative research in the international academic community hasaroused strong repercussions and is widely used in ecology (forest ecosystems; wetlandecosystems; scale research involving global scale, national scale and regional scale, but alsoto environmental policy and management and regional character carrying capacity assessment,etc.; agro-ecological systems, etc.), industrial and economic systems analysis and evaluationof ecological and economic sustainability value and other aspects of research can even bespecific to genetic information is stored, resulting in a better effect.This study selected a different central and southern regions of the Loess Plateau islocated Chunhua and two natural economic environment agriculture subsystem Citrus fruitfarming subsystems and complex system as the research object, and select two representativetypical village, West Village and Nam Shin Estate, household survey data and surveys by thelocation of Agriculture Bureau of Fruit Industry Bureau and the Bureau of Meteorologycollection, drawing reference to other relevant research model, while the correspondingexpansion of the energy value of the input-output structure of the region’s depth and breadth.Were comparative study of2008and2011invested two years in the Loess Plateau in centraland southern agricultural ecological environment system output, the operating efficiency andenvironmental impact and other issues, to explore the natural conditions and economicconditions of the local agriculture, fruit and complex systems The influence of the purpose ofcoordinating the harmonious development between man and nature, provides a newtheoretical perspective for the use of agricultural resources in rural areas in central andsouthern Plateau, but also provide the basis for the structure of crop-fruit farmers in differentparts of the system optimization and efficiency improvement. The results showed that:1.Xipo Village and Nan an Shan Village in2011relative to2008the average annualwind energy has increased, the degree of soil erosion is more serious, is not conducive toeconomic development, to be further improved, but the two villages has increased rainfall isconducive economic development. Local resources are non-renewable emergy Nan an Shanvillage agricultural use in the largest part of the contribution. Nan an Shan village crop-fruit ecological system of the production process on the local consumption of nonrenewableresources than Xipo Village of the agricultural production process, revealing the XipoVillage farming subsystem is more complex if the weak foundation of the naturalenvironment. Compared to2008, two villages renewable organic energy and non-renewableemergy is increased, indicating that the level of economic development of the two villagesand education levels are improved. Intensification of production systems and high degree ofmodernization, a relatively small contribution to environmental resources. Xipo Village andNan an Shan village crop-fruit ecological system is a higher degree of dependence on theenvironment in2011.2. Xipo Village and Nan an Shan Village in2008and2011crop-fruit ecological systemnonrenewable environmental emergy larger proportion of renewable resources, althoughsmall, is still a considerable proportion, still serious soil erosion, for soil and waterconservation work is still not be ignored. Crop-fruit ecological system emergy investment inindustrial emergy-based, organic auxiliary emergy lower proportion, In2011compared to2008did not improve the investment, so the village farmers should pay attention to organicenergy input, organic energy is a renewable resource, improving the ratio of the organic tothe sustainable development of the system has an important significance.3.In2011ChunHua regions of precipitation are more than2008, soil erosion degree ishigher than in2008, the natural conditions for agricultural economic development. Productionprocess of local not more resources consumption of more than2008, the natural environmentmore weak foundation. Two regional economic development level, the education level ishigher than in2008. In2008and2011, subsystems of agriculture, fruit and crop-fruitecological system buy value emergy accounted for the most, free emergy environment value,the proportion of is relatively small. In central and southern loess plateau crop-fruit ecologicalsystem and the emergy sources mainly comes from the economic system of the subsystems ofthe purchase value, less dependent on the environment. In2011two area crop-fruit ecologicalsystem dependent on the environment, by system production intensification andmodernization degree is low, the contribution of environmental resources relatively large.4. Between the two regions,ChunHua region its precipitation than Luochuan, than inLuochuan degree of soil erosion areas, the natural conditions more conducive to agriculturaleconomic development. Luochuan, relative to the2008area of renewable resources of all theindexes fell, show that improved natural conditions, conducive to economic development in2008. ChunHua region agricultural natural environment fruit compound system is more weak.Based improved natural environment in luochuan in2011, during the production consumptionreduced. ChunHua region’s economic development level is higher than in luochuan, education degree than in luochuan district, too. ChunHua region’s economic development, educationlevel has also improved in2011, while luochuan district declined.
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