Research On Physiology Character Of Small And Small And Medium Sized Apples After Picking

This research takes the small and medium size apples ('k9','huangtaiping','jinhong') in Heilongjiang Province as experiment materials. It mainly studied on the storage character of small and medium size apples at cryogenic storage and MA storage condition respectively. It fixed to the the best storage temperature is 0±0.5℃through determinating the physiology character. It then conbine different fresh bags with 0±0.5℃storage condition to determine rationalize character regularly and compare the difference between MA cryogenic storage and common cryogenic storage to small and medium size apples.The results showed that:(1) The small and medium size apples are the typical jump fruit and it has the obvious respiration peak. It can suppress the respiration release quantity obviously and delay the peak time at cryogenic and MA storage condition.(2)The proper storage temperature is 0±0.5℃of small and medium size apples. Under this condition, it can safely stored but not have cold damage. And stored under this temperature has obviously suppressed the maturity and the senility of small and medium size apples, and prolong the storage period.(3)It has obvious effect to suppress Storied at suitable low temperature of MA method, the effect to the small apple fruit degree of firmness descended. And the degree of firmness of'k9'drops most slowly with the 0.08mmPE storage conditions.(4)There is a inverse correlation of small and medium and small size apples with firmness descended and water-soluble pectin content. But it has an active correlation with original water-soluble pectin degeneration and PG hoisting. The PE packing suppresses the PG activeness elevating through the varying degree, thus suppressed the original water-soluble pectin degeneration, and maintains fruit with a high firmness.(5)It can stave the changing processing of soluble sugar and the soluble solid. And it can reduce the cost of VC and titratable acidity at cryogenic and MA storage condition. So it will keep fruit with good quality.(6)It has a real tolerance to highly concentrated CO2 of'jinhong'and'k9'.But'huangtaiping'is relatively weak tolerance to the CO2, and stored with 0.08mmPE with long time, the individual apple turning brown and with slight ethyl alcohol taste.