Study On Courtyard Type Ecological Agriculture System In South Hunan Based On Emergy Analysis

The population drama increases at present, the resource attenuation, the environment worsening, already become three big difficult problems facing the rural area in the nowadays and agriculture.The agriculture needs a realization of sustainable development, must handle the good environment and the resource problem right away, can protect and improve ecological environment in agriculture not only by developing eco-agriculture, rational, continue forever the field makes use of resource, can avoid waste of resources, improve productivity and resource utilization ratio, promote the agriculture sustainable development. Southern Hunan area land area about 5.71×10~4 km~2, is a agriculture district of Hunan province, has the natural resources condition and the condition producing economy developing eco-agriculture.This article take the Hunan Province Yongzhou Ecological agriculture Demonstration Base as the example, a choice typical peasant household, the utilization can the value analysis method, the local garden ecological agriculture pattern carries on the analysis appraisal to Hunan south, and compares with the ordinary peasant household's garden convention agriculture pattern, discusses under this local garden land different use pattern the planter system, the cultivation system's energy flow and the energy flow mechanism, the quantitative analysis environment resources and the production activity true value as well as between them the relations, the garden ecological agriculture pattern which confirms this local garden convention agriculture pattern after to joining increases the link (methane system) and produces link forms to be able highly effective the value to put into production the aspect the tendency to compare, to further promote utilizes this pattern, speeds up the socialism new rural reconstruction and the promotion agriculture continues forever the development to provide the scientific basis and the reference. Present paper's research work mainly includes the following several aspects:(1) Have set forth the feasibility studying area courtyard environmental-friendly agriculture pattern (pattern I) and courtyard routine agriculture pattern (pattern II , III) structure characteristic and value carrying out an energy are analytical.(2) The 3 kinds pattern courtyard agriculture energies value having wielded the objective magnanimity of energy value analysis theory throws into and energy value outputs status, have built energy value index system from this, having analysed an index combining with and an energy, have adopted to draw a parallel between following the valuation having been in progress to 3 kinds courtyard agriculture patterns synthesis including economic effect, organism's habits beneficial result beneficial result. Result is indicated: Synthetical beneficial result of courtyard environmental-friendly agriculture pattern is maximal, self organizational capability, capability of sustainable development are strong, product security is tall, obvious good economic effect advantage, have stronger development potential; The pattern II takes second place, synthetical pattern III beneficial result dispatches most.(3) The environmental-friendly agriculture has demonstrated representative base peasant household from 1999 to 2007 the courtyard agro-ecology economic system basic organism's habits stream has carried out energy value analysis during the years to Hunan province Yongzhou City, system at the same time corresponding with other has carried out comparison by the index calculating the energy value getting a series but reflecting the environment and annual production relations time evolution development, has analysed the Yongzhou City environmental-friendly agriculture synthetically demonstrating base agricultural environment resource reasonableness develops a course, structure of agricultural production, characteristic and their sustainable development evolution trend, The plan producing the pattern and sustained development for working out that area courtyard has made the beneficial exploration.