A Study on Determination of Energy Productivity and Greenhouse Gas Emissions in Wheat Production

Abstract

In this study, energy use efficiency (EUE) and greenhouse gas emissions (GHG) in wheat production were defined, and the energy equivalents (EE) of the inputs in production per unit production area, EUE and GHG values of the product were computed. The data used in the study were obtained from 175 different wheat producing enterprises in 2021 by conducting face-to-face surveys according to the proportional sampling method. In the study, the amount of direct (DE) and indirect energy (IE) use in wheat production and their shares in total energy consumption were defined. According to the results of the study, total energy input (EI) in wheat production was com-puted as 19,024.21 MJ/ha and energy output (EO) as 80,585.40 MJ/ha. It was defined that the input with the highest energy consumption was fertili-zation with a value of 8748.38 MJ/ha. This was followed by seed energy input 4626.79 MJ/ha (24.32%), fuel energy 2697.25 MJ/ha (14.18%), irriga-tion energy 2362.50 MJ/ha (12.42%), chemicals energy 269.19 MJ/ha (1.41%), machinery energy 309.52 MJ/ha (1.63%), human labor energy 10.58 MJ/ha (0.06%). EUE, energy productivity (EP), specific energy (SE) and net energy (NE) yield values were 4.24, 0.29 kg/MJ, 3.47 MJ/kg and 61561.19 MJ/ha, respectively. Total GHG emission for wheat production was computed as 3784.60 kgCO2-eq/ha. The highest share of total GHG emissions belonged to seed (59.41%). Seed was followed by irrigation (16.84%), nitrogen fertilizer use (14.60%), phosphate fertilizer use (3.99%), fuel use (3.49%), chemicals use (0.98%), machinery use (0.58%) and hu-man labor (0.10%). In addition, the GHG ratio in wheat production was computed as 0.69 kgCO2-eq/ha.