不同浓度膨大剂处理对“红地球”葡萄贮存品质的影响

Effect of Different Concentration Enlargement Treatments on Storage Quality of 'Red Goble' Grape

以"红地球"葡萄为试材,以清水为对照(CK),研究了不同浓度膨大剂(低浓度40、80mg·L^(-1),高浓度100、200mg·L^(-1))处理对"红地球"葡萄贮存品质的影响。结果表明:使用膨大剂处理后"红地球"葡萄可溶性固形物、可滴定酸和总酚含量下降快,且膨大剂的浓度越高,下降的越快;腐烂率、漂白指数和呼吸强度提高,膨大剂的浓度越高,提高的越多;低浓度(40、80mg·L^(-1))膨大剂处理葡萄的金属螯合力和对DPPH自由基清除力最高,高浓度(100、200mg·L^(-1))处理次之,CK最低;贮存30d前,低浓度(40、80mg·L^(-1))膨大剂处理葡萄维生素C含量、铁氰化钾还原力和羟自由基清除力最强,高浓度(100、200mg·L^(-1))处理次之,CK最低,贮存60d后,CK变为最高,高浓度(100、200mg·L^(-1))处理变为最低。在实际生产中要考虑膨大剂对"红地球"葡萄口感、外观及保健功能的影响,根据需要合理使用膨大剂。

‘Red Globe＇ grape were used to determine the effect of different concentration enlargement treatments（low concentration 40,80 mg · L-1 ; high concentration 100,200 mg · L-1 ） on grape storage quality. The results showed that during storage time, the soluble slide content, titratable acid content and total phenolics content in grape of enlargement reduced fast, the higher the concentration, the faster falling; the decay rate, bleaching index and respiratory intensity in grape of enlargement increased,the higher the concentration, the more elevation; vitamin C and DPPH radical scavenging activity were the highest in the grape of low concentration enlargement treatment（40,80 mg· L-l）, then the high concentration enlargement treatment（100,200 mg · L-1）, the CK treatment was the lowest;the first 30 days of storage period, vitamin C content, potassium ferricyanide reduction ability and hydroxgl radical scavenging activity were the highest in the grape of low concentration enlargement treatment （40,80 mg · L-· ）, then the high concentration enlargement treatment （100, 200 mg · L-1）,the CK treatment was the lowest· the CK treatment became the highest, the high concentration enlargement treatment （100,200 mg · L-1） became the lowest after 60 days. The experiment showed that, the effect of the enlargement on the taste,appearance and healthcare function of the ‘Red Globe＇ grape in actual production, and use the enlargement reasonably according to our demand.