Utjecaj morske vode na kemijski sastav i prinos blitve u hidroponskom uzgoju

master's thesis

• Title (english): The impact of seawater on chemical composition and yield of swiss chard in hydroponics
• Author: Zrinka Jurjević
• Mentor: Sanja Fabek Uher (mentor)
• Committee member: Sanja Fabek Uher (predsjednik povjerenstva)
• Committee member: Božidar Benko (član povjerenstva)
• Committee member: Jana Šic Žlabur (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Vegetable Crops); Zagreb
• Defense date and country: 2022-07-14, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Navodnjavanje zaslanjenom vodom sve je izraženiji problem koji ima nepovoljan utjecaj na sustav tlo – biljka, a kao prikladno rješenje može se preporučiti hidroponski uzgoj. No, nabava vodotopivih gnojiva predstavlja velik udio u troškovima proizvodnje. Stoga je potrebno istražiti mogućnosti primjene morske vode u odgovarajućoj koncentraciji koja ne šteti biljkama, a koje nisu halofiti, budući da neprerađena morska sol sadrži brojne minerale. Cilj ovog rada bio je utvrditi kemijski sastav i prinos blitve u plutajućem hidroponu. Dvofaktorijalni pokus obuhvatio je 2 otopine: standardna hraniva otopina za uzgoj lisnatog povrća i morska voda, te dvije sorte blitve ('Charlie' i 'Tamnozelena blitva'), uz gustoću sjetve 38,2 g/m2. Tijekom jednokratne berbe utvrđen je prinos te je određena nutritivna vrijednost (suha tvar, vitamin C, fenoli, flavonoidi, neflavonoidi, klorofil i karotenoidi). Najveća količina suhe tvari (13,38%) utvrđena je kod sorte 'Charlie' uzgajane u zaslanjenoj otopini. Primjena morske vode u uzgoju 'Tamnozelene blitve' negativno je utjecala na sadržaj suhe tvari, te pozitivno na količinu vitamina C, ukupnih fenola, flavonoida, neflavonoida, klorofila i karotenoida. Testirane kombinacije sorte i otopine u istraživanju rezultirale su prinosom blitve u rasponu od 0,93 (ˈCharlieˈ×morska otopina) do 1,79 kg/m2 (ˈTamnozelenaˈ×standardna otopina).

Abstract (english)

Irrigation with saline water is an increasingly pronounced problem that negatively affects the soil-plant system, and hydroponic cultivation can be recommended as a suitable solution. However, the purchase of water-soluble fertilizers represents a large part of the production costs. Therefore, it is necessary to study the possibilities of using seawater at a suitable concentration that does not harm plants that are not halophytes, since untreated sea salt contains numerous minerals. The aim of this work was to determine the chemical composition and yield of swiss chard in a floating hydropon. The two-factorial experiment included 2 solutions: a standard nutrient solution for growing leafy vegetables and seawater, and two swiss chard cultivars ('Charlie' and 'Dark Green Chard') with a sowing density of 38,2 g/m2. During the single harvest of swiss chard yield and nutritional value (dry matter, vitamin C, phenolics, flavonoids, non-flavonoids, chlorophyl, and carotenoids) were determined. The highest dry matter content (13,38%) was found in the leaves of cultivar 'Charlie' grown in saline solution. The use of seawater in the cultivation of 'Dark Green chard' had a negative effect on the dry matter content, i.e. a positive effect on the amount of vitamin C, total phenolics, flavonoids, non-flavonoids, chlorophyll and carotenoids. The cultivar and solution combinations tested in the research resulted in swiss chard yield ranging from 0,93 ('Charlie'×sea solution) to 1,79 kg/m2 ('Dark Green'×standard solution).

• Keywords: vitamin C; lisnato povrće; klorofili; plutajući hidropon; ukupni fenoli
• Keywords (english): vitamin C; leafy vegetables; chlorophyll; floating hydropon; total phenolics
• Language: croatian
• URN:NBN: urn:nbn:hr:204:419938
• 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: 2022-08-29 08:02:42