Utjecaj koncentracije hranive otopine na kemijski sastav i prinos divlje rige u plutajućem hidroponu

master's thesis

• Title (english): The effect of nutrient solution concetration on the chemical composition and yield of wild rocket in a floating hydropon
• Author: Gabrijel Antonina
• Mentor: Sanja Fabek Uher (mentor)
• Committee member: Sanja Fabek Uher (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: 2023-09-29, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Divlja riga (Diplotaxis tenuifolia L.) je samonikla biljna vrsta iz porodice krstašica, a uzgaja se zbog aromatičnih i pikantnih listova. S obzirom na porast potražnje za ovom vrstom, sve je rašireniji njezin uzgoj u hidroponskom uzgoju kako bi se eliminirali problemi konvencionalnog uzgoja na tlu s ciljem postizanja veće nutritivne vrijednosti i većeg prinosa uz smanjenje troškova proizvodnje. No nabava vodotopivih soli za pripremu hranive otopine predstavlja velik udio u troškovima hidroponskog uzgoja. Stoga je potrebno istražiti mogućnost smanjenja koncentracije hraniva u otopini bez negativnog utjecaja na nutritivnu vrijednost i prinos divlje rige. U istraživanju su testirane tri koncentracije (25, 50 i 100 %) standardne hranive otopine za uzgoj lisnatog povrća. Najveća količina suhe tvari (12,65 %), vitamina C (113,86 mg/100 g svježe tvari), ukupnih fenola (158,87 mg GAE/100 g svježe tvari), flavonoida (61,41 mg GAE /100 g svježe tvari), neflavonoida (97,46 mg GAE/100 g svježe tvari), ukupnih klorofila i karotenoida (0,51 i 0,125 mg/g svježe tvari) utvrđeni su u listovima divlje rige uzgojene u 100 %-tnoj koncentriranoj hranivoj otopini. Najveći prinos listova (3,18 kg/m2) zabilježen je pri uzgoju divlje rige u otopini s 50 %-tnom koncentracijom hraniva.

Abstract (english)

Wild rocket (Diplotaxis tenuifolia L.) is a wild plant species from the Brassicacea family that is cultivated for its aromatic and spicy leaves. Considering the increasing demand for this species, its hydroponic cultivation is becoming more popular to eliminate the problems of conventional soil cultivation and achieve higher nutritional value and yields while reducing production costs. However, the purchase of water-soluble salts for the preparation of the nutrient solution accounts for a large part of the cost of hydroponic cultivation. Therefore, it is necessary to research the possibility of reducing the concentration of nutrients in the solution without negatively affecting the nutritional value and yield of wild rocket. In the research, three concentrations (25, 50 and 100%) of the standard nutrient solution for growing leafy vegetables were tested. The highest amount of dry matter (12.65%), vitamin C (113.86 mg/100 g fresh matter), total phenols (158.87 mg GAE /100 g fresh matter), flavonoids (61.41 mg GAE /100 g fresh matter), non-flavonoids (97.46 mg GAE /100 g fresh matter), total chlorophyll and carotenoids (0.51 and 0.125 mg/g fresh matter) were determined in leaves of wild rocket grown in 100% concentrated nutrient solution. The highest yield of leaves (3.18 kg/m2) was obtained when wild rocket was grown in a solution with a nutrient concentration of 50%.

• Keywords: Diplotaxis tenuifolia L.; hidroponski uzgoj; suha tvar; vitamin C; ukupni fenoli
• Keywords (english): Diplotaxis tenuifolia L.; hydroponics; dry matter; vitamin C; total phenolics
• Language: croatian
• URN:NBN: urn:nbn:hr:204:007512
• 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: 2023-11-14 10:34:13