Utjecaj temperature hranive otopine i zasjenjivanja na kvalitetu i prinos ljetnog matovilca iz plutajućeg hidropona

master's thesis

• Title (english): Effect of nutrient solution temperature and shading on the quality and yield of summer lamb's lettuce in floating hydropone
• Author: Matija Novak
• Mentor: Nina Toth (mentor)
• Committee member: Nina Toth (predsjednik povjerenstva)
• Committee member: Sanja Fabek Uher (član povjerenstva)
• Committee member: Lepomir Čoga (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Vegetable Crops); Zagreb
• Defense date and country: 2022-09-28, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Zbog potražnje matovilca tijekom cijele godine potrebno je istražiti mogućnost njegovog uzgoja u uvjetima visoke temperature zraka i dugog dana. Pokus je bio postavljen 2021. godine u proljetno-ljetnom roku u plutajućem hidroponu plastenika Zavoda za povrćarstvo Sveučilišta u Zagrebu Agronomskog fakulteta. U dvofaktorijalnom pokusu sa sortom matovilca 'Accent', prvi faktor bila je temperatura hranive otopine, a drugi zasjenjivanje energetskom zavjesom. Veće relativne stope rasta morfoloških pokazatelja ukazuju na brži i intenzivniji rast mlađih biljaka matovilca. Najveće vrijednosti većine promatranih morfoloških pokazatelja 7, 14 i 20 dana nakon nicanja te prinosa i količine većine analiziranih minerala ostvarene su pri uzgoju u hlađenoj hranivoj otopini uz prekrivanje energetskim zavjesama. Ekonomski isplativ ljetni uzgoj matovilca moguć je u plutajućem hidroponu uz hlađenje hranive otopine u cilju održavanja temperature na optimalnih 20 °C, odnosno za 5 do 6 °C nižoj temperaturi nego tijekom pokusa. Zbog pozitivnog učinka na prinos i sadržaj biogenih elemenata u lišću, može se preporučiti korištenje energetskih zavjesa za ljetni rok uzgoja matovilca u plutajućem hidroponu.

Abstract (english)

Due to the year-round demand of lamb's lettuce, it is necessary to research the possibility of its cultivation in conditions of high air temperature and long days. The experiment was set up in 2021 in the spring-summer period in the floating hydropon in the greenhouse of the Department of Vegetable Crops University of Zagreb, Faculty of Agriculture. In a two-factorial experiment with the cultivar 'Accent', the first factor was the temperature of the nutrient solution and the second was shading with shading screens. Higher relative growth rates of morphological parameters indicated faster and more intense growth of younger lamb's lettuce plants. The highest values of most observed morphological parameters 7, 14 and 20 days after emergence, as well as the yield and amount of the analyzed minerals, were obtained when the plants were grown in a cooled nutrient solution and with shading by shading screens. Economically profitable summer cultivation of lamb's lettuce is possible in a floating hydropon with cooling of the nutrient solution to maintain the temperature at an optimal 20 °C, i.e., 5 to 6 °C lower than during the experiment. Due to the positive effect on yield and the content of biogenic elements in the leaves, shading screens can be recommended for summer cultivation of lamb's lettuce in a floating hydropon.

• Keywords: Valerianella locusta; morfološka svojstva; relativna stopa rasta; minerali
• Keywords (english): Valerianella locusta; morphological properties; relative growth rate; minerals
• Language: croatian
• URN:NBN: urn:nbn:hr:204:947836
• 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 authenticated users
• Created on: 2022-10-20 08:49:37