Fig. 21: Sugar content of strawberries

4.3.4 Interior quality of yield

4.3.4.1 Sugar content

Sugar content of strawberries was measured at three times during the harvest period. Due to differences in the ripening, different sample dates between treatments had to be taken. Magnum had with values of 10-11°BRIX a higher sugar content than Sonata with values of 8-9°BRIX. There were no differences between light sources measured. It seems that the sugar content increased at the end of the harvest period (Fig. 21).

Fig. 21: Sugar content of strawberries.

Letters indicate significant differences (HSD, p ≤ 0,05).

4.3.4.2 Taste of strawberries

The taste of strawberries, subdivided into sweetness, flavour, juiciness and firmness was tested by untrained assessors on 02.03.2018. The rating within the same sample was varying very much and therefore, same treatments resulted in a high standard deviation. It seems that the light source did not influence the sweetness, flavour and juiciness of strawberries, while the firmness seems to be higher under LED lights. It seems that Sonata was evaluated with more juiciness while Magnum was evaluated with more firmness (Fig. 22).