Study On The Optimal Coupling Model Of Agricultural Industry-resources System Are Based On The Cdm In Xiannangou Watershed

The Xiannangou watershed carbon reserve has been increased significantly since returning the grain plots to forestry.With the development of CDM the carbon sink industry will become a newly-developing industry in the agricultural industry-resource system of the watershed.In the meantime the system run counter because of low resource utilization.So we set 7 scenes in 3 models as possible paths for development,and in those scenes we optimized the system on the basis of ecological suitability evaluation of agricultural land.Final,on this background we discuss the best plan of construction and implementation on the chain network in this system about production mode of farmers.(1)To evaluate the ecology suitability of agricultural land in this watershed we used the ecological suitability evaluation model of agricultural land and we specify the threshold of production factors in this system.The result shows that the area suits to plough and orchard is225.46 hm~2,accounting for 5.09%of the total area;the area only suits to plough is 405.68hm~2,9.17%of the total area;the area suits to woodland and orchard is 156.96 hm~2,3.55%of the total area;the area only suits to orchard is 773.15 hm~2,17.47%of the total area;the area suits to woodland and meadow is 881.43 hm~2,19.91%of the total area;the area only suits to woodland is 409.91 hm~2,9.26%of the total area;the area only suits to meadow is 1490.00hm~2,33.66%of the total area;The remaining unsuitable and unproductive area is 83.43 hm~2,1.89%of the total area.(2)We identified 7 scenes in 3 models as possible paths for the watershed according to the development needs of new age and the watershed.The 7 scenes and 3 models is current development pattern;economic carbon scene and non-economic carbon scene in carbon industry development pattern;economic carbon scene and non-economic in carbon carbon industry and specially agricultural products about normal farmers and family farm scenes in carbon industry and specially agricultural products development pattern.(3)Under the threshold,we optimized the system of the 7 scenes.It was conclusion that carbon industry and specially agricultural products about family farm is the best plan.Through the optimizing,in the 6 scenes of carbon industry development the area of plough and orchard been increased,especially the area of orchard,and the area of ecological forest is stable.And in the best plan the area of cash crops is 55.23 hm~2;the area of food crops is476.93 hm~2;the area of apple orchards is 561.61 hm~2;the area of ecological forest is 1758.82hm~2;the area of grass is 1490.00 hm~2.Agricultural industry-resource system which based on the features,low carbon,high efficiency and high yield guarantee the stability of the ecological(carbon sink)benefits,and the economic benefits are at their best.In contrast the area of ecological forest in current development pattern been greatly reduced,and the consequence didn't suit for relevant policy,so it was just a theoretical result and can't be used in reality.(4)Under the consequence of the optimizing,we designed the production models of farmer.And we divided farmers into apple planting,facilities for vegetables planting,field planting and livestock breeding farmers.Through the analysis of the current situation of the agricultural industry-resource system in the watershed,we get the optimal scheme of different types of farmers in the best development scene.Apple planting farmers use“terrace-apple”as the main chain,and depend on modern agricultural equipment(sprinkling irrigation,drip pipe,anti-hail network,etc.)to improve product yield and quality and reduce labor cost,moreover it has a good economic and good ecological(carbon sink)benefits.field planting farmers use“terraces,hillsides,gully slopes-agricultural products,food crops”as the main chain,and through improving production methods to produce featured agricultural products to improve economic efficiency,also it has a good economic and good ecological(carbon sink)benefits.facilities for vegetable planting farmers use“valley,dam field-facility-agriculture”as the main chain,and depend on agricultural facilities such as greenhouse and organic fertilizers and biological pesticides to produce vegetable and other economic crops,but it need the ecological forest to compensate the carbon sink.Livestock breeding farmers use“terraces-feed grain-sheep and mountain,valley-forage-sheep”as the main chain,and use the farm with the aid of modern equipment to breed sheep,but it also need the ecological forest and some orchard to compensate the carbon sink.