Analysis And Evaluation Of The Material And Energy Characteristics On Typical Countyard Circular Economy Mode

Circular agriculture is increasingly becoming the dominant mode of world agricultural development. Farmer household as rural basic economic organization, is the most direct and widely subject to develop circular agiculture, popularize advanced production mode and technique of circular type courtyard economy, not only conforms to the Chinese actual situation that millions of farmers operate small-scale'agriculture, but also can improve the utilization efficiency and level of agricultural resources, on the mean time it is the farmers'realistic choice of local rich. Based on the exploration about theoretical research and practice of circular agriculture and courtyard economy in home and abroad, this study establish the ideal mode of circular courtyard economy ,study energy flow,economic, social and ecological benefits of sunlight greenhouse models, explores the innovation mode of joint biogas, and finally put forward the corresponding countermeasures according to the analysis on exiting situation,the main conclusions are as followed:1. The establishment of an ideal circular type courtyard ecosystem should follow the five principles, namely: to protect the ecological environment and local rural characteristics; insist on the organic unity between function and space ; keep rural ecological cycle; inheritance local culture; adhere to the promotion of suitable techniques.2. The research about typical pattern of sunlight greenhouse shows that in the planting subsystem, the energy output-input ratio is 5.57:1 and has reached a higher level of intensive farming ,compared to high-yield standard of that-2.42:1. The improvement of system should focus on the utilization efficiency of the light. The ratio of energy input-output was 0.71:1 and feed energy conversion rate was 46% in breeding subsystem, compared to that rate of traditional family breeding model,these figures are higher, so we should make full use of existing breeding conditions to expand breeding size and develope stereo raising.3. The effect of marshy fertilizer on watermelon in open field shows that melon seedling with slurry spraying produce have traits of dark green leaves, wide leaf width, more fruit setting up,and early melon seedling. From the whole growth period, planting watermelon in a way combined base residue with slurry spraying can produce high yield, good quality, sweet, good color and luster, and can effectively prevent watermelon blights. The main reason is that residues contain organic matter, humic acid, can improve the quality of soil and buildup soil fertility. Meanwhile marshy fertilizer containins nitrogen, phosphorus, potassium, sodium, calcium and other nutrients, can meet the need of watermelon growth.4. The results of partnerships biogas innovation pattern indicate that its'construction cost of partnbiogas was less 507 yuan than single-family methane and service cost per year was more 54.76 yuan. The net present value of the former was 54720.41 yuan and the latter was 4332.11 yuan, scale economy benefit is remarkable and the index of that was 115%. So the joint household project had better bright prospects. From 2007 to 2009, the comprehensive scores of environmental profits in Wolong district were 6.126, 6.156, 5.816 respectively.