master's thesis
Suma toplinskih jedinica potrebna za nicanje različitih populacija korovne vrste Abutilon Theophrasti Med

Ivan Kovačić (2016)
University of Zagreb
Faculty of Agriculture
Department of Plant Pathology
Metadata
TitleSuma toplinskih jedinica potrebna za nicanje različitih populacija korovne vrste Abutilon Theophrasti Med
AuthorIvan Kovačić
Mentor(s)Maja Šćepanović (thesis advisor)
Abstract
Toplina je jedan od glavnih čimbenika potrebnih za nicanje biljnih vrsta. Sumiranjem efektivnih temperatura (TJ) moguće je utvrditi početak i dinamiku nicanja korovnih vrsta što se koristi kod kreiranja prognoznih modela nicanja. Većina korovnih vrsta ima inter-populacijsku varijabilnost koja se očituje u različitom stupnju dormantnosti, klijanju i nicanju između različitih populacija iste korovne vrste. Postojanje inter-populacijske varijabilnosti može otežati interpolaciju stranih prognoznih modela u naše proizvodno područje. Cilj ovog istraživanja bio je poljskim pokusom usporediti nicanje hrvatskih populacija korovne vrste Abutilon theophrasti s 11 populacija ove vrste iz devet država Europe i SAD-a. Za svaku istraživanu populaciju cilj je bio utvrditi sumu toplinskih jedinica zraka i tla potrebnu za početak i duljinu trajanja nicanja. Pokus je postavljen u jesen 2013. godine na pokušalištu Maksimir Agronomskog fakulteta u Zagrebu. Shema pokusa je bila slučajni blokni raspored u 4 ponavljanja. Rezultati istraživanja ukazuju na postojanje varijabilnosti između istraživanih populacija korovne vrste Abutilon theophrasti. Najmanja suma toplinskih jedinica (415,15 toplinskih jedinica) potrebna za ponik 50% posijanih sjemenki utvrđena je kod američkih (Iowa, Minnesota) populacija te također i kod populacije iz Hrvatske. Utvrđena je signifikantna razlika potrebne sume tolinskih jedinica kod hrvatske i portugalske populacije gdje su populaciji iz Hrvatske za ponik bile potrebne 272,8 toplinske jedinice, dok je najsporije nicajućoj populaciji iz Portugala bila potrebna suma 382,1 toplinske jedinice.
KeywordsAbutilon theophrasti GDD integrated weed control modeling weed emergence inter-population variability
Committee MembersMaja Šćepanović (committee chairperson)
Klara Barić (committee member)
Dubravka Dujmović Purgar (committee member)
GranterUniversity of Zagreb
Faculty of Agriculture
Lower level organizational unitsDepartment of Plant Pathology
PlaceZagreb
StateCroatia
Scientific field, discipline, subdisciplineBIOTECHNICAL SCIENCES
Agronomy
Study programme typeuniversity
Study levelgraduate
Study programmePhytomedicine
Academic title abbreviationmag. ing. agr.
Genremaster's thesis
Language Croatian
Defense date2016-07-07
Parallel abstract (English)
Warmth is one of the main factor driving germination and emergence processes. It is possible to determine the beginning and dynamic of emergence of weed species by summarizing growing degree days (GDD), which is used with the development of predictive emrgence models. Most of the weed species is characterized by inter-population variability which is manifested through different stages of dormancy, germination and weed emergence among different populations of the same weed species. Inter-population variability makes interpolation of foreign modeling weed emergence difficult for our agricultural domain. The aim of this study was to compare the emergence of Croatian population of the weed Abutilon theophrasti with 11 populations of this species from nine European countries and the United States by doing the field trial. For each studied population objective was to determine the growing deegre days for air and soil units needed for beginning and duration of germination. The experiment was set up in the fall of 2013 at Maksimir experimental station of Faculty of Agriculture Zagreb. The scheme of the experiment was randomized block schedule with 4 repetitions. The results of this study proved the existence of variability among researched populations of weed species Abutilon theophrasti. The lowest growing deegre days required for the 50% of emergence of sown seeds (415.15 GDD) were found in the US (Iowa, Minnesota) populations, as well as in the Croatian population. A significant difference was determined in the growing degree days with the Croatian and Portuguese population, where Croatian population needed 272,8 GD for the first emergence, while the slowest emerging populations of Portugal needed 382,1 GD.
Parallel keywords (Croatian)Abutilon Theophrasti suma toplinskih jedinica integrirano suzbijanje korova prognozni modeli nicanja inter-populacijska varijabilnost
Resource typetext
Access conditionOpen access
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:204:245773
CommitterValentina Bezek