Study on Effects of Multifield Coupling on Storage Quality Wheat
The theory of multi field coupling is a hot topic in the field of grain storage in recent years,and the multi field coupling effect is even more difficult to study.Studying the influence of multi field coupling effect on grain quality can not only provide theoretical basis for intelligent management of grain,but also provide practical reference for the establishment of monitoring system.Biological field and physical field were taken as the basis of multi field coupling effect,wheat grain pile was taken as the experimental basis,and wheat and storage pests were taken as the bi-ological field.There were Sitophilus Oryzae with different population density in wheat.The data measured in 98 days were processed by Matlab software,and the temperature distribution cloud diagram of the grain pile was drawn.The changes of wheat storage quality in different environments(storage temperature 15 ℃/relative humidity 75％RH,25 ℃/70％RH,35 ℃/65％RH)were compared by using response surface methodology and multiple regression analysis,and a multi field coupling model of wheat stack quality change was constructed,the study found that the model of dry gluten content and falling value had a strong fitting degree under the coupling effect(R2＞0.9),while the fitting effect of the fatty acid value model was not ideal at 15 ℃,and the fitting effect of the malondialdehyde content model was de-creases with prolonged storage time.Finally,the main factors affecting the fitting effect of the model were analyzed,and the applicability of the wheat quality model was proposed.The results indicated that temperature,humidity,Sito-philus oryzae and other factors had significant effects on wheat storage quality during wheat storage,and the quality of the upper grain pile was more stable than that of the lower grain pile;the coupling degree of field strength had a signifi-cant effect on the quality.Secondly,adding grain pile depth to the wheat quality model can improve the fitting degree of the model;at the same time,multi field coupling effect had different effects on wheat quality,and reasonable selec-tion of parameters and adjustment of field strength were conducive to the stability of wheat storage quality model.
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