Morfološka svojstva i prinos krastavca pod utjecajem biostimulatora

master's thesis

• Title (english): Morphological traits and yield of cucumber affected by biostimulants
• Author: Jurica Jakunić
• Mentor: Božidar Benko (mentor)
• Committee member: Božidar Benko (predsjednik povjerenstva)
• Committee member: Sanja Fabek Uher (član povjerenstva)
• Committee member: Nina Toth (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Vegetable Crops); Zagreb
• Defense date and country: 2017-12-15, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Uzgoj krastavca u negrijanim zaštićenim prostorima omogućava nešto raniju sadnju nego na otvorenom, pri čemu postoji rizik pojave temperatura nižih od minimalnih za rast, što može stresno utjecati na biljku. Istraživanjima je utvrđeno da biostimulatori uz povećanje asimailacijske površine pozitivno utječu na povećanje otpornosti biljaka prema stresnim uvjetima. Stoga je provedeno istraživanje s ciljem testiranja utjecaja biostimulatora Bioplex i EkoBooster 2 na morfološka svojstva ploda i prinos krastavca (cv. Bosco i Tajfun) u hidroponskom uzgoju u usporedbi sa netretiranom kontrolom. U periodu od 30. svibnja do 25. srpnja obavljeno je trinaest berbi. U svakoj berbi utvrđen je broj i masa tržnih te udio netržnih plodova. Također, praćene su morfološke karakteristike (duljina, promjer i masa) tržnih plodova tijekom plodonošenja. Tijekom vegetacije krastavca u negrijanom zaštićenom prostoru zabilježena su značajna variranja temperature i relativne vlage zraka te sastava hranjive otopine. Prilikom praćenja morfoloških svojstava ploda utvrđeno je da se testirani kultivari međusobno značajno razlikuju, dok je pozitivan utjecaj primijenjenih biostimulatura izostao. Testirani kultivari su se značajno razlikovali po masi tržnih plodova (236 g Bosco i 215 g Tajfun) i ostvarenom tržnom prinosu (3775 g/biljci Bosco i 3160 g/biljci Tajfun). Tijekom perioda plodonošenja nisu utvrđene signifikantne razlike između primijenjenih biostimulatora i kontrole što se tiče mase tržnih plodova i tržnog prinosa. Signifikantne razlike utvrđene su između interakcija kultivara i biostimulatora, no one su uzrokovane značajnim razlikama među testiranim kultivarima. Masa ploda je bila u rasponu od 214 do 248 g, a tržni prinos je varirao od 2836 do 3915 g/biljci. Temeljem rezultata preporučuje se ponoviti istraživanje uz nešto raniju sadnju u zaštićenom prostoru koji ima mogućnost boljeg reguliranja mikroklimatskih čimbenika i uz odabir većeg broja kultivara i biostimulatora sa svrhom dobivanje točnijih rezultata.

Abstract (english)

Cucumber growing in the unheated greenhouses allows earlier planting than in the open field, where there is a risk of lower temperatures than the minimum for growth, which can affect the plant. Studies have shown that the biostimulants increase of the asimilation surface with a positive effect on increasing the plants resistance to stress conditions. Therefore, a study was carried out to test the influence of biostimulants Bioplex and EcoBooster 2 on the morphological properties of cucumber (cv. Bosco and Tajfun) and cucumber yield, compared to untreated control. Thirteen harvests were done in the period from 30 May to 25 July. In each harvest, the number and weight of the marketable and the share of unmarketable fruits were determined. Also, the morphological characteristics (length, diameter and weight) of the marketable fruits during the harvest period were observed. During the cucumber vegetation in the unheated greenhouse, significant variations of air temperature and relative humidity and the composition of the nutrient solution were noted. When monitoring morphological characteristics of fruits, it was found that the tested cultivars differed significantly, while the positive effect of the applied biostimulants was absent. Tested cultivars differed significantly on the weight of marketable fruits (236 g Bosco and 215 g Tajfun) and achieved marketable yield (3775 g/plant Bosco and 3160 g/plant Tajfun). There was no significant difference between applied biostimulants and control regarding marketable fruits weight and yield. Significant differences were found between interactions between cultivars and biostimulants, but they were caused by significant differences among tested cultivars. The fruit weight ranged from 214 to 248 g, and the marketable yield varied from 2836 to 3915 g/plant. Based on the achieved results it could be recommended to repeat the research with some earlier planting in the greenhouse with the possibility of microclimatic conditions regulation and with the selection of a higher number of cultivars and biostimulants to achieve more accurate results.

• Keywords: Cucumis sativus L.; kultivar; biostimulator; morfološke karakteristike; tržni prinos
• Keywords (english): Cucumis sativus L.; cultivar; biostimulant; morphological characteristics; marketable yield
• Language: croatian
• URN:NBN: urn:nbn:hr:204:680338
• 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: Open access
• Created on: 2018-03-13 12:47:01