Fruit and vegetable respiration rate modeling method

Abstract

The invention relates to the technical field of freshness preservation, in particular to a fruit and vegetable respiration rate model. A fruit and vegetable respiration rate modeling method comprises the following steps of: firstly, establishing a model that a respiration rate changes along with storage time: r=K1{1-K2exp(-kdt)}, in the formula, K1=ks/kd*k and K2=1-kd/ks[E]0; secondly, on the basis of the established model that the respiration rate changes along with storage time, establishing a respiration rate model which contains a storage temperature and a storage time factor: r=K3{1-K2exp(-kdt)}, in the formula, K3=ks/kd*Aexp(-Ea/RT); and finally, on the basis of the established respiration rate model which contains the storage temperature and the storage time factor, establishing the respiration rate model which contains a gas volume fraction and the storage time factor: r=K4{1-K2exp(-kdt)}, in the formula, K4=ksktheta/kd*ayO/(1+ayO+aiyOyC). Due to the adoption of the technical scheme, a mathematical model about the respiration rate of fruit and vegetable main bodies is established based on an enzyme kinetic theory to lay a theoretical foundation for the predication of the respiration rate of the fruit and vegetable main bodies in an air conditioned storage period and the analysis of storage quality.

Description

A Method for Modeling the Respiration Rate of Fruits and Vegetables technical field The invention relates to the technical field of freshness preservation, in particular to a fruit and vegetable respiration rate model. Background technique Modified Atmosphere Packaging (MAP) is an advanced fresh-keeping packaging method for fruits and vegetables. Its principle is to use the respiration of fruits and vegetables in the packaging and the air permeability of the packaging film to change the atmosphere in the packaging environment by using artificial or natural accumulation methods. A microenvironment with low O2 and high CO2 can be used to inhibit the respiration of fruits and vegetables, delay the metabolic process of fruits and vegetables, and prolong their storage period. In recent years, modified atmosphere packaging technology has been widely used in the fresh-keeping technology of fruits and vegetables, and has accumulated certain experience. However, these studies are...

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Problems solved by technology

However, these studies are mainly based on the experience and estimation of researchers to initially select packaging films, and then conduct modified atmosphere packaging experiments to finally determine the appropriate packaging method. This makes the establishment of modified atmosphere packaging conditions time-consuming, expensive, and scattered research. The reproducibility of the storage effect is very high, and the reproducibility of the storage effect is poor, and there is a lack of unified theoretical guidance. Therefore, the modified atmosphere packaging of fruits and vegetables cannot be well promoted and applied.

In addition, the respiration rate of fruits and vegetables is affected by many factors, such as storage temperature, ambient gas conditions, postharvest storage time, and the content of enzymes and substrates, but the existing models rarely consider the influence of various factors on the respiration rate at the same time of

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