Energy Use Efficiency and Greenhouse Gas Emissions in Intensive vs. Organic Apple Production Systems

Abstract

Improving energy use efficiency and reducing greenhouse gas (GHG) emissions are critical for enhancing the sustainability of orchard-based production systems. This study assesses and compares energy inputs, energy use efficiency, and associated GHG emissions in intensive and organic apple production systems under comparable agroecological conditions. Field-level data were collected on inputs including fuel, fertilizers, pesticides, labor, machinery use, and organic amendments, along with yield and management practices. Energy equivalents were used to quantify total input and output energy, while GHG emissions were estimated based on standard emission coefficients for each input. Results indicated that intensive systems exhibited higher total energy inputs due to greater reliance on synthetic fertilizers and chemical plant protection measures, resulting in increased GHG emissions per unit area. However, these systems achieved higher yields, which improved energy productivity per unit output. In contrast, organic systems demonstrated lower total energy inputs and reduced GHG emissions, primarily due to the exclusion of synthetic inputs and greater reliance on organic amendments and ecological pest management practices. Despite slightly lower yields, organic systems showed favorable energy use efficiency and lower environmental impact per unit area. The study highlights trade-offs between productivity and environmental sustainability, emphasizing the importance of optimizing input use in both systems. While analytical tools were used to quantify energy flows and emissions, the primary focus remains on practical orchard management and sustainability outcomes. These findings provide actionable insights for growers and policymakers to improve resource efficiency, reduce emissions, and promote environmentally responsible apple production systems.