Investigation of energy inputs for peach production using sensitivity analysis in Iran

• Published in: Energy conversion and management 2012-12, Vol.64, p.441-446
• Main Authors: Royan, Mahsa, Khojastehpour, Mehdi, Emadi, Bagher, Mobtaker, Hassan Ghasemi
• Format: Article
• Language: English
• Subjects: Applied sciences; Energy; Exact sciences and technology; Input–output energy; Iran; Peach; Prunus; Sensitivity analysis
• ISSN: 0196-8904; 1879-2227
• DOI: 10.1016/j.enconman.2012.07.002

► We investigated energy use and inputs–output relationship in peach production. ► Total energy consumption in peach production was 37536.96MJha−1. ► Diesel fuel with about (26.32%) was the major energy consumer. ► Energy use efficiency and energy productivity were 0.55 and 0.29kgMJ−1. ► The machinery energy was the most significant input affecting the output level. The purpose of this research was to investigate the energy balance between the energy inputs and yield in peach production in Golestan province of Iran as a case study. The results showed that total energy consumption in peach production was 37536.96MJha−1 where the diesel fuel with about (26.32%) was the major energy consumer. The direct energy shared about (50.98%) whereas the indirect energy did (49.02%). Energy use efficiency, energy productivity, specific energy and net energy were 0.55, 0.29kgMJ−1, 3.41MJkg−1 and −16642.03MJha−1, respectively. Econometric assessment results revealed that the energy inputs of human labor, machinery, diesel fuel, chemical fertilizers and farm yard manure had significant influence on the yield. The impact of human labor energy (1.36) was found as the highest among the other input parameters. Sensitivity analysis indicated that the MPP value of energy inputs was between −2.8 and 11.31. Also the MPP value of human labor was the highest, followed by diesel fuel and farm yard manure energy inputs, respectively.