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The effect of cherry fruits postharvest treatment with composition of chitosan and salicylic acid on their after storage qualities

Cherry is a widespread crop in Ukraine, it is a valuable source of vitamins and antioxidants though it is a perishable food unit. Therefore, the search for storage technologies using new types of packaging is underway. The aim of the study was to determine the effect of treatment on the composition of chitosan and salicylic acid on the physico-chemical characteristics of cherry fruits during the storage. For research, the fruits of the cherry varieties of Alfa and Pam’yat Artemenka, grown at the pomology research station named after L.P. Symyrenko of the Institute of Pomology of NAAN, the day before harvesting were treated with a solution of chitosan with salicylic acid and then dried for a day. Picked from the trees in the consumer stage of ripeness, the fruit were put in boxes №5 weighing 5 kg for storage at a temperature of 1±0.5 °C and a relative humidity of 95±1 %. Untreated fruits were taken as the control.

According to the research results, the output of marketed cherry fruit of Alpha and Pam’yat Artemenka remained at the level of 85.2 % and 83.6 %, respectively, in 15 days of storage with the weight loss of 5.4−5.7 %, the content of soluble solids decreased by 8.9–10.1 %, titrated acids 2 times, ascorbic acid – 1,7–1,9 times.

Compared to the control, the treatment of cherry fruits with salicylic acid solution allowed to increase the yield of marketable products by 2.4−2.2 %, to reduce the weight loss to 3.5−3.4 %, the solids content by 3.8−4.4 %, titrated acids – by 41.8 −48 %, ascorbic acid – 36.1 and 33.3 %.

The cherry fruit pretreatment with 1 % solution of chitosan with salicylic acid is the most effective and contributes to an increase in the yield of marketable products by 7.8–8.6 % for the weight loss of 2.7–3 %. Losses of soluble solids content were 1.3–1.9 %, titratable acids 24.6–44 %, ascorbic acid 18.3–19.8 %.

Key words: cherry fruits, soluble solids, titrated acids, ascorbic acid, storage, chitosan, salicylic acid.

 

Vasylyshyna O. https://orcid.org/0000-0002-1066-4009


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YEAR: 
2020
AGROBIOLOGY №1 2020