National promotion of the "planting and breeding cycle" model.

Ecological agriculture has formed a closed loop, achieving both environmental protection and benefits. Content: The Ministry of Agriculture and Rural Affairs has recently focused on promoting the 'pig biogas grain' farming cycle model, which uses microbial fermentation technology to convert pig manure into biogas for power generation and organic fertilizers, achieving zero pollution emissions. Taking a certain ecological farm in Jiangxi Province as an example, its investment in the construction of a manure resource utilization system can process 200 tons of pig manure per day, generate 120000 kWh of biogas power annually, and produce organic fertilizers covering 10000 acres of surrounding farmland, reducing fertilizer use by 30%. Under the circular economy model, pig farms not only save millions of environmental protection costs, but also increase annual income by over ten million yuan through electricity and fertilizer sales. At present, over 500 large-scale pig farms across the country have replicated this model, forming a virtuous cycle of 'pig farming promotes planting, and planting feeds back pig farming'. Experts believe that the circular farming model will reshape the ecological value chain of pig farming and promote the coordinated development of rural revitalization and agricultural modernization.