The Influence of the Ratio of Mango Waste Covered with Nano-Film on the Process of High-Temperature Composting and the Humification Characteristics

This study addresses the challenges of large-scale processing and resource utilization of mango waste in the Panzhihua region. Its focus is on investigating the key role of material ratio optimization in improving the humification quality of compost products. Three typical wet weight ratios of discarded mango and pruning branches were used (T1, T2, T3) toconduct high-temperature aerobic composting experiments under the stable environmental conditions provided by nanomembrane coverage. The temperature of the compost pile, nitrogen transformation, and dynamic changes in humic components were systematically monitored. The results showed that the T2 treatment achieved the optimal compost performance, entering the high-temperature period (≥55 °C) within 4 days, with a peak temperature of 61.9 °C, and the high temperature lasting for 13 days. The carbon-nitrogen ratio decreased by 46.6%, and the ammonia volatilization rate was the lowest (0.0135 mg/(m2·d)); the degree of humification was the highest, with the HA/FA ratio reaching 2.19 and the seed germination index being 222.49%. This study demonstrates that an appropriate “fruit-to-branch” ratio, under the stable environment created by nanomembrane coverage, can synergistically promote the compost humification process and product quality. This provides a reliable theoretical basis and technical pathway for the resource utilization of mango waste.