脉冲磁场下储藏小麦自身呼吸CO_2变化分析研究

RESEARCH ON CHANGE OF CO_2 PRODUCED BY RESPIRATION OF WHEAT STORED UNDER PULSED MAGNETIC FIELD

储粮自身呼吸是陈化和霉变的重要原因之一,为动态了解储藏期间粮食呼吸的效应,开展了小麦自身所产生CO2浓度变化的研究工作.对常规条件下小麦自身呼吸CO2浓度与脉冲磁场中不同强度和脉冲数所对应的试验数据进行分析研究,结果表明:低水分储藏小麦的CO2浓度呈线性恒稳变化,脉冲磁场能抑制小麦的后期呼吸从而延缓小麦的陈化变质进程;而中、高水分的数据严重偏离线性关系,变化幅度较大,在高强度和大脉冲数的磁场中,出现曲线变化的拐点(阈值),其对小麦呼吸作用中CO2浓度变化发生窗口效应,在小麦存储中具有促进作用.

The respiration of storage food is one of the important reasons causing aging and mildewing. In this paper, we studied the concentration change of CO2 produced by respiration of wheat in order to dynamically study the grain respiration effect during storage. We analyzed the CO2 concentration of wheat under the conventional condition as well as the test data corresponding to different strengths and pulse numbers in a pulsed magnetic field. The results showed that the CO2 concentration of low-moisture stored wheat had a linear constant change; the pulsed magnetic filed could inhibit the respiration effect of wheat at the later stage so as to postpone aging and deterioration of wheat. However, the data of medium and high-moisture stored wheat deviated from the linear relationship severely, and had large change; and an inflection point （threshold） occurred in the curve in a magnetic field with high strength and large pulse number, so that the pulsed magnetic filed had a window effect on the change of CO2 concentration caused by respiration of the wheat so as to facilitate wheat storage.