This study evaluated the applicability of existing overseas-developed allometric equations for estimating the biomass of domestic apple trees (Malus domestica) in South Korea. To assess their suitability, predicted biomass values derived from these equations were compared with actual measurements obtained through destructive sampling. The results indicate that some overseas equations showed no significant difference when applied to domestic apple trees, suggesting their potential applicability to local conditions. However, it was also noted that certain equations may not fully capture the unique characteristics of domestic apple trees, such as the slender spindle form associated with modern high-density planting practices. Given these findings, the study highlights the need to develop new allometric equations that are specifically optimized for the growth characteristics and cultivation environments of domestic apple orchards. Such equations would enable more accurate biomass estimation, support agricultural sustainability, and provide reliable data for the national greenhouse gas inventory. This research is expected to serve as a foundation for future Tier 2-level studies on biomass and carbon sequestration in apple orchards while also underscoring the importance of expanding research to include various fruit tree species to develop customized biomass estimation models for enhanced agricultural management and environmental conservation.

Abstract
Introduction
Materials and Methods
    1. Experimental environment and materials
    2. Estimation of aboveground and belowgroundbiomass using a destructive method
    3. Aboveground and belowground (root) biomass datacollection
    4. Determination of carbon content
    5. Statistical analysis
Results and Discussion
    1. Growth characteristics
    2. Carbon content of apple trees
    3. Biomass estimation using existing allometricequations
    4. Comparison among various allometric equations
    5. Conclusion
Acknowledgement
References

• Won Tae Choi(Undergraduate student, Department of Environmental Horticulture, Seoul, 02504, Korea)
• Su A Park(Undergraduate student, Department of Environmental Horticulture, Seoul, 02504, Korea)
• Myeong Ja Kwak(Research Professor, Department of Environmental Horticulture, Seoul, 02504, Korea)
• Da Won Kang(Undergraduate student, Department of Environmental Horticulture, Seoul, 02504, Korea)
• Su Young Woo(Professor, Department of Environmental Horticulture, Seoul, 02504, Korea) Corresponding author