循环农业生态环境效应的环境经济学分析——以“稻—鱼”种养结合模式为例

An Environmental Economics Analysis on the Eco-environment Effect of Circular Agriculture——A Case Study on the "Paddy-fish" Mode

循环农业的生态环境效应主要体现在节肥、节药、抑草、改善土壤和水体等方面。文章以"稻-鱼"种养结合循环农业模式为例,在从理论和技术角度分析循环农业的节肥、节药的生态环境效应的基础上,运用环境经济学理论和分析框架,进一步揭示"稻—鱼"种养结合循环农业模式下稻田生态系统中土壤和水体的改善以及有害生物的减少,农户减少了化肥和农药的使用量,形成了鱼类对化肥和农药的替代关系,因而其环境负效应小于常规水稻生产模式,具有相对较高的生态环境效益。

The obvious eco-environment effects of circular agriculture mostly are reflected in the fertilizer and pesticide saving,grass curbing,soil and water improving.Based on the analyzing circular agriculture＇s eco-environment effects of fertilizer and pesticide saving from perspective of theory and technology,taking the ＂Paddy-fish＂ mode as example,and within the analysis framework of environmental economics,this paper further reveals that in the paddyfield ecosystem of paddy-fish mode,the soil and water is improved and harmful organisms are reduced,and farmers significantly reduce the dosage of fertilizer and pesticide use,thus,the substitute relation between the fish and fertilizer and pesticide is formed,and therefore,its environmental negative effect is smaller than conventional rice planting mode,and has the relatively higher eco-environmental benefit.