Physicochemical and nutritional quality of tomatoes grown in a photoselective screenhouse
This study aimed at investigating whether the combination of crop spacing (0.3 and 0.4 m) and a red photoselective screenhouse improved the physicochemical properties and nutritional quality of tomatoes. The hybrid Ivete from Sakata Seeds® was cultivated in 16×12×2.2 m3, 40% red shading screenhouse and open field conditions for comparison. The experiment was conducted from May 21st to November 1st, 2014, in Goiânia, Brazil. Nutritional analyses were performed: physicochemical properties (fresh weight, total soluble solids (TSS), titratable acidity (TA), flavour index (TSS/TA), pH, hardness and colour); and nutritional qualities (vitamin C and lycopene) in harvests of fruits made 98 and 129 days after transplanting, from the 2nd and 5th bunches. All the measures were carried out by official methods. The results were analyzed by an ANOVA for repeated measures and the averages compared by the Tukey test (p‹0.05). The results provide useful data for detecting differences among environment variation in tomato composition and cropping methods on the nutritional and physicochemical characteristics of tomato fruits.
Ferreira, T.A.P.C., Santos, T.M., Fernandes, M.R., Pereira, V.A., Seleguini, A. and Ferreira, R.C. 2017. Physicochemical and nutritional quality of tomatoes grown in a photoselective screenhouse. Acta Hort. (ISHS) 1170:389-398
dry matter, soluble solid, pH-value, total acid, hardness, lycopene