沈阳市桃仙镇农业生态系统能流结构分析

摘要

Taoxian agroecosystem and the evaluation were studied by the method of systematic analysis. The results showed, firstly, total input-output energy ratio has been arrived about 1.65. The utilization rate of solar energy in farmland is below one per cent, which has great potentialities. Secondly, in the first production, the great quantity of artifical supplementary energy depends on external industrial energy input. Thirdly, the stock feed conversion rate of main livestock changes between ten and twenty percent. Based on studies, readjusting measures for sustainable development in agriculture are put forward.%以桃仙镇农业生态系统为研究对象，运用系统分析方法，着重对农田子系统和畜牧业子系统6年的能流结构作了比较全面的分析与总结。结果表明：全系统的能量产投比为1.65。农田的光能利用率低于1％，在光能利用上潜力极大；第一性生产的人工辅助能主要依赖于系统外输入；主要畜禽的饲料能量转化率在10％～20％之间。在以上研究的基础上，提出了桃仙镇农业持续发展的调控对策。