采用响应曲面法对采后红富士苹果热处理条件的优化

Optimization of the conditions for hot-air treatment of postharvest Red Fuji apples using response surface method

采用响应曲面法研究了在不同时间-温度的热空气处理对果实品质的影响。对红富士苹果进行不同时间-温度的热空气处理,处理后的果实置于(0±0.5)℃条件冷藏4个月,然后置于20℃条件下7 d(模拟货架期),对货架结束时果实底色a*值、硬度和固酸比进行测定。采用响应曲面法建立了苹果底色a*值、硬度和固酸比的二次多项数学模型,并验证了模型的有效性,考察了处理温度和处理时间对果实品质各指标的影响,得出优化热处理温度为36.3℃,处理时间82.5 h。

The effect of hot-air treatment on quality of apples （cv： Red Fuji） was evaluated by response surface method（RSM） with different temperature-time combinations. Red Fuji apples were treated under different timetemperature combinations, and then were stored at （0±0. 5）℃ for four months. After that, the apples were placed on simulated shelf at 20℃ for seven days, the changes of a^＊ value, firmness and SSC/TA of apples were measured. Three second order quadratic equations for hot-air treatment were established. The adequacy of the model equation for predicting the optimum response values was verified by the validated data. By analyzing the response surface graphs and corresponding contour graphs as well as solving the quadratic equations. The optimum hot-air treatment temperature is 36.3℃ and the processing time is 82.5 h.