Evaluation energy balance and energy indices of barley production under watered farming in north of Iran

摘要

One way to evaluation of sustainable developing in agriculture is using of energy flow method. This method in an agricultural product system is the energy consuming in product operations and energy saving in produced crops. In this article, evaluation of energy balance and energy indices under watered farming barley in north of Iran (Guilan province) was investigated. Data were collected from 72 farms by used a face to face questionnaire method during 2011 year in Guilan province. By using of consumed data as inputs and total production as output, and their concern equivalent energy, energy balance and energy indices were calculated. Energy efficiency (energy output to input energy ratio) for seed and straw in this study were calculated 2.70 and 2.89 respectively. Also, energy balance efficiency (production energy to consumption energy ratio) for seed and straw in this study were calculated 1.79 and 1.38 respectively, showing the affective use of energy in the agro ecosystems barley production.