Optimization of key parameters and matched tobacco leaf flue-curing technology for mobile curing barns

【Objective】 To explore the key parameters and matched flue-curing technology of mobile curing barns， aiming to provide theoretical basis for the promotion and application of mobile curing barns. 【Method】 Six mobile curing barns with different materials，specifications and energy types were designed and constructed，and the one with the best overall performance was selected. Using the traditional bulk curing barn flue-curing technology as the control group，3 treatment groups with different mobile curing barn flue-curing technologies were established. The effects of different fluecuring technologies on the economic traits，sensory qualities and biochemical indexes of the flue-cured tobacco were analyzed to identify the optimal flue-curing technology for mobile curing barn. A comparison of the flue-curing effects between the selected optimal mobile curing barn and the traditional bulk curing barn was conducted. 【Result】 The mobile curing barn constructed with polyurethane material and U-shaped galvanized spray-painted edges exhibited the best overall performance，with good thermal insulation properties. Compared with the traditional bulk curing barn flue-curing technology，the best matched curing technology for the mobile curing barn significantly increased the top quality tobacco proportion by 15.8%（P<0.05，the same below），significantly raised the average price by 4.2 yuan/kg，significantly increased the total content of fragrance substances by 37.29%，significantly decreased the protein content by 5.46%，and significantly increased the amino acid content by 10.61%. Meanwhile，under the optimal mobile curing barn flue-curing technology，the sensory quality score of the flue-cured tobacco leaves reached 82.1 points，which was significantly higher than that of the traditional intensive bulk curing barn flue-curing technology. Compared with the traditional intensive curing barn，the mobile curing barn significantly reduced the curing cost by 18.75%，significantly increased the top quality tobacco proportion by 87.50%，significantly reduced the green and mixed rate by 26.67%，and significantly improved the sensory quality score by 0.6 points. 【Conclusion】 The mobile curing barn constructed with polyurethane material is easy to install and offers the best overall performance. The optimized flue-curing technology for the mobile curing barn promotes the transformation of internal substance in the tobacco leaves，enhances the sensory quality of the flue-cured tobacco leaves，and effectively improves the intrinsic quality of the tobacco leaves. Compared with the traditional bulk curing barn，the mobile curing barn not only improves the quality of the tobacco but also reduces the cost of flue-curing，demonstrating strong potential for widespread application and promotion.