浸钙结合电场处理对草莓采后生理的影响研究

Effect of Calcium Soaking Combined with Electrostatic Field Treatment on Postharvest Physiology of Strawberry Fruit

研究浸钙结合静电场处理对草莓采后生理的影响,为高压电场处理技术应用于果实贮藏提供理论依据。以"长虹2号"草莓果实为试材,研究浸钙(1% CaCl2,20 min)结合静电场(-200 kV/m,2 h/d)处理对冷藏草莓(贮藏温度0℃,相对湿度85%～90%)果肉最大破断应力、呼吸强度、乙烯释放量及细胞膜透性的影响。结果表明:浸钙结合电场处理较对照(单纯浸钙和浸水)明显抑制了草莓果实的乙烯释放,降低了果实的呼吸强度,保持贮藏期间果实最大破断应力,延缓果肉细胞相对电导率的上升,从而有效地抑制采后草莓果实的衰老过程。而单纯浸钙仅显著抑制了果实最大破断应力的上升,对草莓采后生理无显著影响。浸钙结合高压静电场处理草莓,贮藏效果较佳,且节能特点非常突出。

The objective of this study is to investigate effect of calcium soaking combined with electrostatic field treatment on postharvest physiology of strawberry fruit.The effects of calcium soaking（1% CaCl2,20 min） combined with electrostatic field（-200 kV/m,2h/d） treatment on the changes of maximum breaking stress,respiration strength,ethylene liberated amount and cell membrane permeability of strawberry fruit（＇changhong 2＇） stored at 0 ℃,85%～90% RH were investigated in this paper.The results showed that calcium saoking combined with electrostatic field treatment compared to single calcium or water soaking significantly inhibited the ethylene libration and respiration strength,kept the maximum breaking stress,and delayed the increase of relative conductivity of strawberry fruit,thus effectively inhibited the senile process of postharvest strawberry fruit.Single calcium treatment also could delay the increase of maximum breaking stress but had no significant effect on the postharvest physiology.Calcium soaking combined with electrostatic field treatment could achieve better storage effect and the energy-saving was also very prominent in strawberry storage.