Enhancing Shelf Life and Quality of Carrots as Influenced by Modified Atmosphere Packaging (MAP)

Abstract

Purpose: This study aims to address the postharvest losses of carrots in Bangladesh by evaluating the effect of modified atmosphere packaging (MAP) on the shelf life and quality of three carrot varieties. Research Method: A two-factor experiment was conducted using three carrot varieties (Shidur, Improved Kuroda, and Orange King) and three packaging treatments (control, perforated, and nonperforated polyethylene bag) under ambient condition. The experiment was conducted in a completely randomized design (CRD), and data were analyzed using ANOVA. Findings: Perforated MAP significantly enhanced postharvest performance. Shidur in perforated bags (T1V1) retained deep orange color, excellent freshness, and the highest firmness (11.55 kg/cm²). It showed minimal weight loss (3.98%) superior dry matter content (19.13%), and optimal sugar composition with high reducing sugar (3.43%). Disease incidence and severity were lowest at 19 DAS (67.78% and 55%, respectively), and shelf life extended up to 17.4 days. Non-perforated packaging conserved moisture but was less effective in maintaining quality. Control treatments showed rapid deterioration, with high weight loss (up to 58.66%), increased TSS (13.87%), and 100% disease incidence by day 14. These results demonstrate the combined effect of packaging and varietal physiology in preserving carrot quality. Research Limitations: The study was limited to ambient storage conditions and three carrot varieties. The study did not measure physiological parameters, including respiration and ethylene production under MAP, and excluded biodegradable packaging, so little was known about the storage mechanisms and sustainability, although this could be explored in future work to make it more applicable. Originality/Value: This research provides authentic evidence that perforated MAP, especially with the Shidur variety, is a practical and effective strategy for reducing postharvest losses, enhancing shelf life, and supporting food security and export potential.