采收期对寒红梨不同低温处理后冷藏期和货架期品质的影响OA

To determine the suitable harvest period and storage temperature for long-term cold storage of'Hanhong'pear fruits,'Hanhong'pear fruits from different harvest periods(September 18th,September 25th,and October 2nd)were used as test materials.The changing rules of fruit quality and physiological indicators during cold storage and shelf life under different low-temperature treatments[(-1±0.5)℃,(0±0.5)℃,(2±0.5)℃]were studied.The results showed that with the delay of the harvest period,the soluble solid content of'Hanhong'pear fruits gradually increased at 30 days,60 days,and 150 days of low-temperature storage.The ethylene release rate and respiration intensity gradually increased,while the pulp firmness and titratable acid content gradually decreased.Among them,the fruits from harvest period Ⅱ(September 25th)showed the best fruit quality after low-temperature treatment.The fluctuations of ethylene release rate,respiration intensity,and pulp firmness were the smallest after 7 days on the shelf,and good fruit quality could be maintained throughout the cold storage and shelf life.Among different low-temperature treatments,the(0±0.5)℃ treatment significantly inhibited the ethylene release rate and respiration intensity of fruits from each harvest period,delayed the decrease of pulp firmness,and effectively slowed down the increase of soluble solid content and the decrease of titratable acid content.Based on the comprehensive research results,in the Gongzhuling City production area of Changchun City,Jilin Province,the suitable harvest standard for long-term cold storage of'Hanhong'pears is to harvest at the end of September,with the soluble solid content of the fruits above 11.5％and the pulp firmness not less than 5 kg/cm2.