The Improvement To Equipment Of HVEF And The Effect Of HVEF On Some Climacteric Fruits

In this research, the generating ability of ozone in the previous equipment was measured at first, and found that the concentration of ozone in storage space was higher enough to influence the fruit. So the previous equipment was changed by painting insulative oil paint and add an isolation fixing, the result is the generating ability was reduced to low can be ignored in the changed equipment, and to tomato, only the High Voltage static Electric Field (HVEF) still can keep it fresh.In the research, 100kV/m and 2h/d were chosen by experiment. And apple, peach and pear were investigated in it. Some index of post-harvest qualities were measured during storage such as sensory property, rot rate, weight loose rate, respiratory activity, fruit firmness, content of dissolvable sugar, acidity, content of Vc. And SOD activity, CAT activity, content of MDA and relative conductance was measured as the index about the active oxygene metabolism system.The results are: The HVEF can reduce the rot rate and weight loose rate, restrained breath and the accumulation of dissolvable sugar, and the HVEF can restrained the reduction of firmness, acidity and content of Vc. The HVEF advanced SOD and CAT activity in fruit, restrained the increase of content of MDA and relative conductance. So, the HVEF can reduced the maturating and senescence speed by advancing the activity of enzyme clean out the superoxide and hydrogen peroxide and keep integrality of membrane.