Hodnocení kvalitativních parametrů rajčat v hydroponické produkci

This master thesis focuses on hydroponic tomato production, which has been gaining on importance due to the decreasing availability of fertile soil, lack of water and the growth of global population. The aim of the presented work was to describe the effect of variety and production timing on the yield, growth and qualitative parameters. The study was performed in the commercial greenhouse of AGRO Haná a.s. located in Smržice, Czech Republic and took place between December 13, 2017 and August 10, 2018. Three varieties of the cherry type were included in the study: the main commercial ‘SWEETELLE’ variety and two trial varieties ‘BAMANO’ and ‘AXIANA’. The latter was the only one with entire fruit-bearing cincinni being harvested. The scored growth parameters included weekly growth gain, number of newly emerged leaves and leaf length, stem diameter, number of flowers, number of fruits and fruit weight. In addition, at the level of rows (each consisting of 246 plants), yield over the entire production period was recorded. Among the analysed qualitative traits were L-ascorbic acid content, dry matter content, total sugar content, refractometric dry matter content, antioxidant capacity and the content of total carotenoids. The fruit analysis was performed two times, once for the production with additional artificial lighting (April 16, 2018) and once for the growth under natural light only (June 25, 2018). In summary, qualitative differences between varieties were revealed, for example ‘AXIANA’ gave the highest yield over the entire production period and had the highest L-ascorbic acid content, while ‘BAMANO’ was the variety richest in sugars and refractometric dry matter content. In addition, the fruit quality was influenced by available radiation