Investigating the Amount of Greenhouse Gas Emissions in Different Rice Production Methods in Northern Iran
Subject Areas :
Keywords: Greenhouse Gases, energy consumption, Rice, Global warming potential,
Abstract :
Alireza Tavakoli Polram1* 1- M.Sc, Department of Biosystems Engineering, Islamic Azad University, Takestan Branch, Takestan, Iran *Coresponding author: ar.tavakoli1383@gmail.com Rice is one of the most important crops, which consumes a lot of energy to produce each ton of the product. The present study was designed and implemented to investigate the amount of greenhouse gas emissions resulting from different energy-consuming agricultural operations in two traditional and mechanized rice systems in Gilan province. For this purpose, by using a questionnaire and face-to-face interviews with 40 farmers in four different regions in Gilan province, we collected the data required for machines and consumables, including seeds, fertilizers, fuel, and pesticides in two traditional and mechanized system of rice production in Gilan province. Based on the energy equivalent of each of the consumed inputs, the total amount of input and output energy was calculated, and then based on the amount of total energy consumed in each agricultural operations, the total amount of greenhouse gases caused by them was calculated.were calculated from the product of the amount of energy consumed and the production coefficients of each gas as CO2 equivalent. The results of the investigation showed that there is a direct relationship between the input and output energies in both traditional and mechanized farming systems and the global warming potential caused by them. So, in the mechanized system with more input energy consumption and less output energy, the global warming potential (GWP) was almost twice that of the traditional system. The total amount of global warming potential in the mechanized system was 1287.49 and in the traditional system was 706.9 kg CO2 equivalent per hectare. Also, in the mechanized system, the amount of global warming potential resulting from the construction of machines, the use of nitrogen and the consumption of fuel for the operation of the machines respectively accounted for the highest amount of kilograms equivalent of CO2 per hectare.
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