Utjecaj visokih temperatura na viabilnost sjemena korovnih vrsta u tlu

undergraduate thesis

• Title (english): The influence of high temepratures on the viabilty of seeds of weed species in the soil
• Author: Mateja Pišonić
• Mentor: Valentina Šoštarčić (mentor)
• Committee member: Valentina Šoštarčić (predsjednik povjerenstva)
• Committee member: Klara Barić (član povjerenstva)
• Committee member: Maja Šćepanović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Herbology); Zagreb
• Defense date and country: 2023-09-18, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Sjemenke korova mogu u tlu zadržati svoju viabilnost duži niz godina. Banka sjemena sadržava razne vrste sjemena korova u tlu koje imaju različitu sposobnost nicanja. Neke vrste mogu klijati i nakon preživljavanja nepovoljnih uvjeta, a neke nakon istih gube sposobnost klijanja. Osobina viabilnosti sjemena korova je ključan čimbenik prilikom suzbijanja jer postoji potencijalna mogućnost od daljnjeg širenja i razmnožavanja korova koje želimo suzbiti. Jedna od potencijalnih metoda kojima bi se spriječilo širenje ne samo korova nego i drugih štetnih organizama je i sterilizacija tla. Izlaganje tla visokim temperaturama dovodi do smrtnosti temperaturno osjetljivih korovnih vrsta čime se smanjuje populacija sjemena u banci sjemena tla. Cilj istraživanja jest primjenom različitih temperatura (40, 50, 60, 80, 100, 120 °C) na različitim trajanjima izloženosti tla (30, 60 i 90 min) navedenim temperaturama utvrditi letalnu temperaturu i trajanje izloženosti tla za korovne vrste Amaranthus retroflexus L. te Setaria pumila (L.) P. Beauv. Utvrđivanje letalne temperature i trajanje izloženosti prilog je razvoju metode sterilizacije tla koja se koriste u in situ pokusima bez prisustva viabilnih sjemenki korova. Rezultati istraživanja pokazuju kako visokim temperaturama možemo uništiti te povećati smrtnost korovnih vrsta u tlu koje steriliziramo.

Abstract (english)

Weed seeds can remain viable in the soil for many years. In the seed bank, that is, the place where weed seeds are kept until they germinate and germinate, there are various types of weed seeds that have different germination abilities. Some species can germinate even after surviving unfavorable conditions, and some lose the ability to germinate after the same. The viability of weed seeds is a key factor in control because there is a potential possibility of further spread and reproduction of the weeds we want to control. One of the potential methods to prevent the spread of not only weeds but also other harmful organisms is soil sterilization. Exposure of the soil to high temperatures leads to the death of temperature-sensitive weed species, which reduces the seed population in the soil seed bank. The goal of the research is to determine the lethal temperature and length of soil exposure for the weed species Amaranthus retroflexus L. by applying different temperatures (40, 50, 60, 80, 100, 120°C) at different lengths of soil exposure (30, 60 and 90 min). and Setaria pumila (L.) P. Beauv. Determination of the lethal temperature and duration of exposure is a contribution to the development of soil sterilization methods used in in situ experiments without the presence of viable weed seeds. The results of the research show that high temperatures can destroy and increase the mortality of weed species in the soil we are sterilizing.

• Keywords: viabilost sjemena; sterilizacija tla; smrtnost sjemena korovnih vrsta; visoke temperature; Amaranthus retroflexus L.; Setaria pumila (L.) P. Beauv
• Keywords (english): seed viability; soil sterilization; seed mortality of weed species; high temperatures; Amaranthus retroflexus L.; Setaria pumila (L.) P. Beauv
• Language: croatian
• URN:NBN: urn:nbn:hr:204:445075
• Study programme: Title: Plant Protection; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka zaštite bilja (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka zaštite bilja)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2024-09-25 11:33:42