Prinos i sadržaj bioaktivnih spojeva "baby leaf" blitve iz hidroponskog uzgoja

master's thesis

• Title (english): Yield and bioactive compounds content of soiless grown "baby leaf" swiss chard
• Author: Ena Matičić
• Mentor: Božidar Benko (mentor)
• Committee member: Božidar Benko (predsjednik povjerenstva)
• Committee member: Nina Toth (član povjerenstva)
• Committee member: Jana Šic Žlabur (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Vegetable Crops); Zagreb
• Defense date and country: 2021-09-14, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Hidroponske tehnike podrazumijevaju uzgoj bez tla, u hranivoj otopini, s ili bez inertnog supstrata. Cilj ovog rada bio je utvrditi sadržaj bioaktivnih spojeva i prinos blitve uzgajane u plutajućem hidroponu sa i bez dopunskog osvjetljenja. Očekivalo se kako će dopunsko osvjetljenje pozitivno djelovati na prinos i kvalitetu 'baby leaf' blitve. Pokus je postavljen u ranoproljetnom roku uzgoja 2020. godine, na potopnim stolovima u negrijanom plasteniku. Za dopunsko osvjetljenje (24 satno) korištene su LED svjetiljke sa omjerom crvenih i plavih dioda 50:50. Tijekom uzgoja praćeni su mikroklimatski uvjeti u zaštićenom prostoru. Morfološke analize (masa biljke, broj listova, dužina i širina lista, dužina hipokotila i dužina korijena) obavljane su periodički jednom tjedno. U berbi obavljenoj 26. ožujka, 45 dana nakon sjetve utvrđen je prinos i sakupljen reprezentativni uzorak za laboratorijske analize. U laboratoriju je utvrđen sadržaj suhe tvari, bioaktivnih spojeva i antioksidacijski kapacitet. Tijekom vegetacije nisu utvrđene značajne razlike morfoloških svojstava između biljaka uzgajanih sa i bez dopunskog osvjetljenja. U uvjetima kontinuiranog dopunskog osvjetljenja, utvrđene su niže vrijednosti fenola, flavonoida, neflavonoida, a više vitamina C, ukupnih klorofila, karotenoida i antocijana nego u uzgoju pod prirodnim osvjetljenjem. Ostvaren je značajno veći prinos (1,67 kg/m2) 'baby leaf' blitve u uzgoju pod dopunskim osvjetljenjem odnosu na prinos ostvaren u uvjetima prirodnog svjetla (1,36 kg/m2).

Abstract (english)

Hydroponic techniques involve growing without soil, in nutrient solution, with or without an inert substrate. The aim of this study was to determine the bioactive compounds content and the yield of baby leaf swiss chard grown in a floating system, with and without supplemenal lighting. It was expected that the supplemental lighting would have a positive effect on the swiss chard yield and quality. The experiment was set up in the early spring growing period of 2020, on submersible tables in an unheated greenhouse. For additional lighting (24 hours), LED lamps with a 50:50 ratio of red:blue diodes were used. During vegetation, the greenhouse microclimatic conditions were monitored. Morphological analyzes (plant weight, leaves number, leaf length and width, hypocotyl length, and root length) were performed periodically once a week. At harvest carried out on March 26, 45 days after sowing, the yield was determined and a representative sample was collected for laboratory analyzes. The content of dry matter, vitamin C, phenols, chlorophylls, carotenoids, anthocyanins and antioxidant capacity was determined in the laboratory. During the vegetation, no significant differences were found between plants grown with and without supplemental lighting. Under conditions of continuous supplemental lighting, lower values of bioactive compounds were found than under natural light, but a significantly higher yield (1.67 kg/m2) of baby leaf swiss chard was achieved compared to the yield achieved under natural light conditions (1.36 kg/m2).

• Keywords: Beta vulgaris var. cicla; plutajući hidropon; dopunsko osvjetljenje; suha tvar; antioksidacijski kapacitet
• Keywords (english): Beta vulgaris var. cicla; floating hydroponic system; supplemental lighting; dry matter; antioxidant capacity
• Language: croatian
• URN:NBN: urn:nbn:hr:204:635177
• Study programme: Title: Horticulture; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka hortikulture (magistar/ magistra inženjer/inženjerka hortikulture)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2021-11-03 09:03:10