engleski

Quality of strawberries produced applying two different growing systems

The quality of strawberry fruits (cv. ‘ ‘ Clery’ ’ and cv. ‘ ‘ Asia’ ’ ) was studied and compared under the conditions of two different growing systems (under a high plastic tunnel and in the open field). Several chemical parameters were determined in the harvested fruits: dry matter, soluble solids, total acidity, ratio between sugars and acids, vitamin C, total phenols, non-flavonoid phenolic compounds, total anthocyanins, reducing sugars, sucrose, colour of fruits, and HPLC analysis of flavonols, flavanols, and phenolic acids content. The fruits of cultivar ‘ ‘ Clery’ ’ had more antioxidant compounds than the fruits of cultivar ‘ ‘ Asia’ ’ when grown in the open field. The fruits of both cultivars grown under a tunnel generally had good properties ; however, the total phenol content and the non-flavonoid fraction were somewhat lower. Among the phenolic compounds, (ţ)-catehin, (7)-epicatehin, ellagic, p- coumaric acid, quercetin, and kaempferol were identified and quantified using HPLC equipped with Photo Diode Array detection. The highest content of phenolic compounds was found in cv. ‘ ‘ Clery’ ’ from the open field production. Analysis of antioxidant compounds has not shown statistically significant differences as a result of growing system or grown cultivar. Samples of strawberries grown under a high plastic tunnel, regardless of examined cultivar, had better basic chemical parameters. The mash colour also depends on cultivar and growing system.

strawberries ; Fragaria x ananassa ; cultivar ; growing system ; open field ; high plastic tunnel ; fruit quality

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