Quality of strawberries produced applying two different growing systems Calidad de fresas producidas aplicando dos diferentes sistemas de cultivo

摘要

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, (+)-catehin, (?￠????)-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.