Effects of Different Harvesting Periods on the Quality of Suli Pear and Fresh-keeping Effect in Semi-underground Ventilation Storeroom
In order to determine the suitable harvesting date of Suli pear,Jindingxiehua Suli pear from Ningling County was taken as the raw material.The storage was carried out in semi-underground ventilation storeroom after harvest in five periods(at 140,152,166,180,and 190 days after full flowering,respectively numbered 1-5).Color,hardness,marketable fruit rate,total soluble solid(TSS)content,titratable acid(TA)content,malondialdehyde(MDA)content and polyphenol oxidase(PPO)activity were test during storage.Meanwhile,temperature and humidity in the ventilation storeroom during storage were monitored.The storage property was evaluated by membership function method.The results showed that with the delay of harvest date,fruit hardness decreased,TSS content increased first and then decreased,TA content decreased,and single fruit weight,L*,a* and b* values increased.When stored for 130 days,the good fruit rate of the other harvesting periods was above 80％except for harvesting period 2.At 160 days of storage,harvest period 3 had best storage performance,with the highest values of marketable fruit rate(80.6％),L*(79.00)and TSS content(11.53％).The PPO activity[21.4 U/(min·g)]was the lowest.The a*value was 7.38,the b*value was 47.68,the hardness was 4.94 kg/cm2,the TA content was 0.056％,and the MDA content was 12.81 mmol/g.The average membership value of the indicators related to storage property of the five periods was calculated,and then their storage property was ranked as harvest period 3＞harvest period 2＞harvest period 1＞harvest period 4＞harvest period 5.Therefore,it is recommended that for Ningling Jindingxiehua Suli pear with semi-underground ventilation storeroom storage,the suitable harvest date is September 15,166 d after the flowering stage,and the suitable storage period is mid-February of the next year,with early March of the next year to complete sales.
Jindingxiehua Suli pearHarvest periodSemi-underground ventilation storeroomMembership function methodStorage property
万方数据
维普
