咪鲜胺和百可得对南丰蜜橘保鲜效果的协同效应OA北大核心CSTPCD

This study used miconazole(P),Bacitracin(B)and"miconazole+Bacitracin"(PB)to investigate their preservation effects on Nanfeng tangerine Citrus reticulata cv.Kinokuni.The water immersed sample was used as the control(CK).The decay rate and intrinsic quality indexes of Nanfeng honeydew oranges were measured at the intervals of 7 d in the room temperature storage(R)and 4℃ refrigeration(C),respectively.The decay rate,weight loss rate and intrinsic quality indexes of Nanfeng honeydew oranges were determined at 7 d intervals.Results showed that compared with CK,the decay rate and weight loss rate of samples reduced significantly after P,B and PB treatments during the storage period.In room temperature storage,the decay rate reduced by an average of 10.8,7.9 and 12.4 percentage points,and the weight loss rate reduced by an average of 8.1,6.3 and 7.2 percentage points,respectively.Whereas in refrigerated storage,the decay rate reduced by an average of 3.5,1.8 and 4.5 percentage points,and the weight loss rate was reduced by an average of 4.0,1.1 and 5.2 percentage points,respectively.After the P and B treatments at room temperature,the vitamin C and soluble solids contents were generally higher than these of the CK and PB treatments.The total soluble sugar content,sugar-acid ratio and solid-acid ratio were the highest in the P treatment and lower in the B treatment,with the PB and CK treatments falling in between,but the titratable acid content changed oppositely.The overall pattern of change in intrinsic quality indexes was not obvious after P,B and PB treatments under refrigerated conditions.The present study showed that single use of imazethapyr and Bacitracin at room temperature or under refrigeration improved post-harvest freshness significantly,and the combination of the two could extend the shelf-life synergistically,with the single use of imazethapyr at room temperature was better for the fruits,while the chemical treatment had no adverse effect on the fruits under refrigeration.This study provide a theoretical basis for the preservation mechanism of miconazole and Bacitracin,and postharvest preservation of Nanfeng tangerine.