基于能值计算的循环农业发展个例分析

能值分析能够更好地量化分析和评价循环农业。利用该方法对湖北省武汉银河生态有限公司的循环农业进行了实证分析。结果表明，实施循环农业后的集约养殖场结合农地流转发展起来的“猪-沼（能）肥-地-菜（藕、果、粮）-鱼-村”六位一体的循环农业典型模式，与实施循环农业前当地分离的水稻、小麦、油菜、棉花、蔬菜、柑橘、猪、鱼的农业生产系统相比，在能值转化率、可更新率、能值投资率、能值自给率、净能值产出率、环境负载率、能值交换比率方面均表现出明显优势，并从能值的角度提出了完善循环农业体系的对策建议

TYPICAL ANALYSIS ON THE DEVELOPMENT OF RECYCLING AGRICULTURE BASED ON EMERGY CALCULATIONS

Emergy analysis can be applied to quantitative analysis and the evaluation of recycling agriculture.The paper utilized this method to make an empirical analysis on the recycling agriculture of Yinhe Ecological Agriculture Co.,Ltd.in Wuhan,Hubei Province.The results indicated that separated intensive breeding farms combined with land transference could develop the six in one cycle typical patterns of recycling agriculture,"pig biogas fertilizer land vegetables fish village".Compared with the separated agricultural production systems of rice,wheat,rapeseed,cotton,vegetables,citrus fruits,pigs,and fish,the former showed better performance in emergy transformity,updatable rate,emergy investment rate,emergy self sufficiency rate,the net emergy yield,environmental load ratio,and emergy exchange ratio.Therefore,to upgrade recycling agriculture need not only strengthen the methodology of research,but also improve agricultural infrastructure,accelerate scientific and technological innovation,extend the industrial chain and so on.