Case analysis and environmental impact assessment of pig-biogas-citrus model in South China: a case study from Changgang village of Jiangxi Province

Pig-Biogas-Citrus is a model of ecological agriculture and energy construction in South China. The practice proved that this model has strong vitality. This paper made analysis and environmental impact assessment for this model in Changgang village of Jiangxi Province. The result showed that the model has favorable economical and environmental benefit.