The Energy Analysis And Emergy Analysis Of "Four-in-one" Ago-ecosystem

The construction "the development of production, the ample life, the local customcivilization, the village accommodates neatly, the democracy of manages" the newcountryside in socialism realization resources use of the highly effective, the protection andthe improvement agriculture and the countryside ecological environment, fundamentallychange the countryside production life reject to make dirty, chaotic, the bad aspect, to realizethe agriculture and the rural economy continue to grow stably, realizes the question which theagriculture modernization and the socialism new rural reconstruction urgent needs to solve."Four-in-one" eco-agricultural model is one king that has a rapid development in northChina in recent years. The model which ingeniously used added-ring technology of the foodchina, composed integrated with sunlight greenhouse, animal house, toilet and biogas cellar,the model changed traditional solo planting method into organic combining with planting andbreeding together, realized multi-cricle utilization of organic matter by ferment function ofbiogas cellar.Based on defined "four-in-one" eco-agricultural model as an integrated eco-system. Theenergy analysis of material, energy and currency with input and output in "four-in-one"agro-ecosystem is discussed in this paper. And the energy input and output in ago-ecosystemand subsystem are evaluated. The structure and proportion of auxiliary energy and the ratio ofoutput/input in courtyard agro-ecosystem, planting and breeding subsystem were discussedwith emergy indexes. The regulation and control measures of energy flow in courtyardagro-ecosystem are put forward. Draws the conclusion to be as follows:1.In whole growing season, the in put energy of the" four-in-one, eco-agricultural systemadded up to668200MJ,the percent of solar energy and the auxiliary energy arerespectively84.58%and15.42%; the output energy added up to 24520MJ; the ratio ofinput/output of energy was27.25:1; the sequence of output energy were the planting system,the ferment system and breeding system, the percentage of output energywererespectively72.32%, 15.78% and 11.90%.2.By means of emergy analysis, the inflows and outflows of energy and other resourcesevaluated on a common basis, i.e. the content of solar equivalent energy, were objectivelymeasured in the case studies. Indices and ratios based on energy and emergy analyses werecalculated and used to evaluate the behaviors of three subsystems.The result indicatedthat,Has the ratio which the function invests (to have function/always to be able value) very big, besides ferment system to have the function to invest lowly, the overall system has thefunction to invest very is all high.The explanation has realized the organic matter multistagecirculation use in the agriculture ecosystem, increased reduced the environmental pollutionusing the efficiency.