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Energy and economic analysis of greenhouse strawberry production in Tehran province of Iran

机译：伊朗德黑兰省温室草莓生产的能源和经济分析

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摘要

The aims of this study were to determine energy use pattern, to investigate the energy use efficiency, and to make an economical analysis in greenhouse strawberry production in Iran. Data used in this study were obtained from 25 greenhouse strawberry growers using a face to face questionnaire method. The results indicate that greenhouse strawberry production consumed a total energy of 121891.33 MJ ha~(-1). About 78% of this was generated by diesel fuel, 10% from chemical fertilizers, and 4.5% from electricity. Energy ratio, specific energy, net energy and energy intensiveness of greenhouse strawberry production were 0.15, 12.55 MJ kg~(-1), -683488.37 MJ ha~(-1) and 8.18 MJ $~(-1) respectively. Determination of the efficient allocation of energy resources were modeled by Cobb-Douglas production function. Econometric model evaluation showed the impact of human labor, fertilizers, installation of equipment and transportation costs for strawberry production were all significant at 1% level. The elasticity estimates indicated that among the cost inputs, transportation is the most important input (-0.75) that influences total cost of production, followed by labor (0.31), fertilizers (0.18) and installation of equipments (0.22). The benefit-cost ratio and net return were obtained as 1.74 and 151907.91 $ ha~(-1), respectively.
机译：这项研究的目的是确定能源使用方式，调查能源使用效率，并对伊朗的温室草莓生产进行经济分析。本研究中使用的数据是使用面对面调查表方法从25个温室草莓种植者处获得的。结果表明，温室草莓生产消耗的总能量为121891.33 MJ ha〜（-1）。其中约78％是柴油燃料，10％是化肥，4.5％是电力。温室草莓生产的能量比，比能，净能和能量强度分别为0.15、12.55 MJ kg〜（-1），-683488.37 MJ ha〜（-1）和8.18 MJ $〜（-1）。通过Cobb-Douglas生产函数对能源有效分配的确定进行建模。计量经济模型评估显示，人工劳动，肥料，设备安装和运输成本对草莓生产的影响均显着，仅为1％。弹性估计表明，在成本投入中，运输是影响总生产成本的最重要的投入（-0.75），其次是劳动力（0.31），化肥（0.18）和设备安装（0.22）。效益成本比和净收益分别为1.74和151907.91 $ ha〜（-1）。

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