Emergy Analysis of Agricultural Ecosystem Based on Ecological Environment Loss
Emergy analysis of agriculture ecosystem was a hot topic of academic group nowadays. Concerned with the loss of ecological environment, an improved emergy analysis of agriculture ecosystem was proposed based on the calculation of agriculture ecological environment loss. Taking Zhengzhou as the example, this pa-per discussed how to apply it to practice. The results showed that the average ecological environmental loss of Zhengzhou from 2000 to 2009 was 2. 44 × 1021 sej,accounting for 15. 47% of economic emergy out of agricul-ture ecosystem. The method was rational for its conclusion was in agreement with the domestic and internation-al research results,the proportion of agricultural externality to agricultural income was 6% ~30%. Given the agriculture ecological environment loss subtracted from economic emergy output, the average Net emergy yield ratio EYRL fallen from 2. 86 to 2. 45, and the average emergy sustainable indices ESIL from 1. 19 to 1. 01, in-dicating that the influence of ecological environmental loss on eco-efficiency and performance of system was significant.
国家科技期刊平台
NSTL
万方数据
维普
