The Emergy Analysis Of "Rice-wheat" Rotatinon Complex Ecosystem Based On Straw Cycle Use

This paper take some typical straw recycling model of chengdu plain as research object, take farmland ecosystem for the core, through field visits and field testing to obtain relevant data, the use of energy theory and analysis method, under different modes of production, "wheat-rice"rotation production systems (including traditional tillage management mode of rice-wheat "rotation production system, based on corn stover mode"rice-wheat "rotation production system, based on amount of strain to field 100% Java,150% and 200% under the "straw-mushroom-mushroom residue-food"complex ecological system) and different cropping patterns in wheat, rice production in sub-systems to the value of comparative analysis, the following conclusions:(1) The emergy analysis of "rice-wheat" rotation on production system①under five different production modes of "rice-wheat" rotation production system, the input emergy was 4.99×1015sej,2.04×1015sej,4.40×1015sej,6.76×1015sej,8.93×1015sej, output energy followed by 1.45×1012sej,1.38×1012sej,5.46×1013sej,8.09×1013sej,1.07×1014sej.②under five different production modes of "rice-wheat" rotation production system, the value of unpaid accounts for the energy input ratio of the system are small, Energy accounting system purchased the energy input larger than the ratio; of industrial support to the value of the total energy value and the total auxiliary energy value of the relatively high proportion of organic to a relatively small proportion of total value.③under five different production modes of "rice-wheat" rotation production system, the value of the production system of solar energy conversion rate of traditional farming management>Straw mode>"straw-mushroom-mushroom residue-food" complex ecosystem (100% FR)> "straw-mushroom-mushroom residue-food" complex ecosystem (150% FR)> "straw-mushroom-mushroom residue-food" complex ecosystem (200% FR); net energy yield "straw-mushroom-mushroom residue food "complex ecosystem (150% FR)> "straw-Mushroom-Mushroom Java food "complex ecosystem (100% FR)> " straw-Mushroom-Mushroom Java food "complex ecology system (200% FR)> Straw Model> conventional tillage management; environmental stress traditional farming management> Straw Mode> "straw mushroom-mushroom residue-food" complex ecosystem (200% FR)> "straw mushroom-mushroom residue-food" complex ecosystem (150% FR)> "straw mushroom-mushroom residue-food" complex ecosystem (100% FR). (2) The emergy analysis of wheat and rice subsystem①under different treatment methods, the value of wheat production systems into traditional production> CFS> 200% FR> 150% FR> 100% FR; value of rice production systems into traditional production> CFS> 200% FR> 150% FR> 100% FR; rice production five farming methods, the purchase value of the total energy input to the traditional production> CFS> 200% FR> 150% FR> 100% FR. Within which to purchase energy value of wheat production value of industrial support to be able to input traditional production> CFS> 100% FR> 150% FR> 200% FR; organic energy input 200% FR> 150% FR> 100% FR> CFS> Traditional production; energy output CFS> traditional production> 200% FR> 150% FR> 100% FR.purchase emergy in rice production, the emergy input of industry aided is that traditional production> 200% FR> CFS> 150% FR> 100% FR; organic energy input 200% FR> 150% FR> 100% FR> CFS> traditional production; energy output Traditional production of> 150% FR> CFS> 100% FR> 200% FR.②under different modes of wheat production, net energy yield 150% FR> 100% FR> 200% FR> CFS> traditional production; energy input density CFS> 200% FR> 150% FR> 100% FR; environmental stress traditional production> CFS> 200% FR> 150% FR> 100% FR.Different rice production, the net energy yield 150% FR> 100% FR> 200% FR> CFS> traditional production; energy input density traditional production> 200% FR> CFS> 150% FR> 100% FR; environmental stress traditional production> CFS> 200% FR> 150% FR> 100% FR.Based on the above conclusions, put forward optimization suggestion on the Chengdu Plain straw optimization proposal for recycling mode, the view that extended the "straw-mushroom-mushroom residue-food" complex ecosystem model in local, use the crop straw product mushroom, the slag is also produced by bacteria into the field for crop production. In the actual production process, the volume of wheat straw per hectare 15200kg about 16kg potash fertilizer,230kg fertilizer, rice production per hectare to field capacity 14600kg in about potash fertilizer 85kg,145kg fertilizer, so as to achieve efficient use of energy cycle to increase crop yield, soil fertility, reduce the environmental pressure of economic, ecological and social benefits of the combination of the three.