Study On New Freshness Maintaining Technology Of Garlic Scape During Shelf Life

Garlic scape is rich in nutrition and is deeply loved by consumers.At present,MA technology is widely used in domestic enterprises to store garlic sprouts.As with other fruits and vegetables,the suitable gas index of garlic scape is also changeable.Therefore,it is urgent to develop reliable and accurate atmosphere control technology to meet the needs of the storage industry of garlic scape.Fresh cut garlic scape is hygienic and convenient to eat,and the market demand is large.However,their fresh keeping techniques are lack of systematic research.In this paper,the main quality problems and the shelf life of fresh cut garlic scape under different temperatures were first investigated and the effects of different packaging materials on the quality of fresh cut garlic scape were also studied.In addition,the technology of accurate control of oxygen concentration using respiratory quotient as a dynamic adjustment index is explored.The results showed that:1.The main quality problem of fresh cut garlic scape was discoloration,incisional water loss and shrinkage,and the shelf life of fresh garlic scape was 12,12,6 and 3 days under the conditions of 0,5,10 and 15?,respectively.Low temperature could effectively slow down its water loss,inhibit chlorophyll degradation and lignin production,there by delay senescence and prolong shelf life.2.Under the condition of modified atmosphere packaging,the higher temperature can cause the odour smell and sunken spot of fresh cut garlic scape during the shelf life.Low temperature can effectively control this problem.GC-MS analysis found that,ethanol,BETA-methyl acetylpropionic acid,C₁₀H₂₆ acenenene may be the main composition of abnormal odours at higher temperatures.3.Under the same condition,compared with 0.02 mm thick PE film,0.04 mm PE packaging can inhibit the degradation of chlorophyll.The study on the quality of fresh cut garlic scape with the same thickness?0.02 mm?of different materials?PE and PE+masterbatech?showed that the film of polyethylene?PE?add with masterbatch.can significantly reduce the odour.4.The results of dynamic atmospherecontrol of garlic scape showed that the respiratory coefficient had a sudden increase with the oxygen concentration decrease to 1.7%-1.8%,which showed that the respiratory metabolism of garlic scape was abnormal under this oxygen concentration.Therefore,in the dynamic atmosphere control of garlic scape,the oxygen concentration should be gradually reduced and maintained at a precise control point of slightly higher than 1.7%-1.8%.