作　　者： ; (吕恩利）; (陆华忠）; (黄浩）;

机构地区： 广东机电职业技术学院

出　　处： 《农业工程学报》 2018年第10期267-273,共7页

摘　　要： 为了准确预测荔枝的呼吸速率,该文以"桂味"荔枝果实作为试验材料,采用密闭空间系统法对不同温度(5、10、15、20、25℃)下贮藏期间荔枝呼吸速率及贮藏空间O_2和CO_2浓度进行检测,分别以非线性模型、基于酶动力学原理的Michaelis-Menten模型、多元回归模型对荔枝呼吸速率进行预测。结果表明:3个模型标准差小于0.05,非线性模型P1预测值的相对误差为-10%~28%,Michaelis-Menten模型P2预测值的相对误差为-14%~14%,多元回归模型P3预测值的相对误差为-10%~10%;多元回归模型P3误差最小并且走势与实际值更吻合;荔枝贮藏过程中气体浓度变化与时间存在非线性关系,温度与呼吸速率之间存在明显的Arrhenius关系,荔枝呼吸特性满足Michaelis-Menten模型;多元回归预测模型P3可以准确的预测荔枝的呼吸速率,该模型分析了影响呼吸速率的多个因素之间的耦合关系,为动态气调参数设置提供理论依据。 Litchi is delicious, which is loved by consumers, But litchi is a fruit which is extremely not resistant storage. After a period of normal temperature, litchi is easy to browning and flavour. Litchi belongs to the respiratory strong fruit, Litchi can consume certain oxygen to produce carbon dioxide during respiration. Therefore, during storage, the concentration of carbon dioxide and oxygen directly affects the respiratory intensity of litchi. For the study of litchi respiration rate prediction model in this paper, ＂Guiwei＂ litchi fruit was chosen as the experimental material,at different temperatures （5, 10, 15, 20, 25 ℃） using a closed space system method to carry out the research on the respiration rate of Litchi, The nonlinear model, Michaelis-Menten model based on the principle of enzyme dynamics and multiple regression model for the prediction of the respiration rate of Litchi. The results show that among the three models, the multivariate regression model has the highest degree of fitting, providing a reference for the calculation of the respiration rate of litchi. The temperature has a certain influence on litchi respiration rate, the temperature rise will accelerate the respiration of litchi, low temperature contribute to the inhibition of respiration, Litchi during respiration rate decreased with time increasing, tends to a stable value, in the long run during the cold storage of litchi to keep low respiratory rate can effectively prolong the quality of litchi shelf life. Based on multiple regression analysis of litchi respiration rate, this paper fitted several respiratory rate models, and the fitting degree is high. The expression can provide reference for the calculation of litchi respiration rate. In order to compare the differences between different models, this paper verified the litchi each respiration model under 15 ℃, The fitting degree of the three models was greater than 0.92, which indicated that all the three models were suitable for calculating the respiration rate of litchi. T

关 键 词： 水果 贮藏 模型 荔枝 呼吸强度 气体组分浓度

领　　域： [轻工技术与工程—农产品加工及贮藏工程] [轻工技术与工程—食品科学与工程]