Izotopni potpis dušika u odabranim tlima Republike Hrvatske

master's thesis

• Title (english): Nitorogen isotopic signature in selected soils of the Republic of Croatia
• Author: Marina Baričević
• Mentor: Aleksandra Perčin (mentor)
• Committee member: Aleksandra Perčin (predsjednik povjerenstva)
• Committee member: Aleksandra Bensa (član povjerenstva)
• Committee member: Tomislav Karažija (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (General Agronomy); Zagreb
• Defense date and country: 2022-09-29, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Dušik je neophodan element za sva živa bića na Zemlji. U prirodi se nalazi kao smjesa dvaju stabilnih izotopa (14N i 15N) čijim se sastavom i udjelom karakterizira okoliš i evolucija tla. Prirodni izotopni potpis dušika (δ15N) u kopnenom okolišu uvjetovan je složenošću ciklusa dušika, a uključuje sve njegove transformacije i stupnjeve izotopnog frakcioniranja. Cilj ovog diplomskog rada bio je utvrditi varijabilnost ukupnog dušika i δ15N izotopa (izotopni potpis dušika) u odabranim tlima... More Republike Hrvatske ovisno o načinima njihova korištenja. Istraživanje je uključivalo analizu 27 arhiviranih uzoraka tla prikupljenih u razdoblju 2005.-2020. u sklopu znanstvenih istraživanja djelatnika Zavoda za opću proizvodnju bilja uzorkovanih na jedanaest lokacija u Hrvatskoj (Vukovar, Potok, Molve, Zagreb, Žumberak-Samoborsko gorje, Lepoglava, Karlovac, Gospić, Vodnjan, Pag, Mljet). Ukupni dušik određen je metodom suhog spaljivanja, a vrijednosti δ15N izotopa EA-IRMS metodom. Rezultati istraživanja ukazuju na utvrđeni raspon δ15N vrijednosti od 0,0 ‰ do +7,19 ‰, a ukupnog dušika od 0,084 % do 0,991 %. U većini promatranih tala (21 uzorak) izotopni potpis dušika ukazuje na organsko podrijetlo dušika u tlu (3,81 ‰ do 7,19 ‰), u tri uzorka tla (dva livadna tla i skijaški spust) dušik potječe iz mineralnih dušičnih gnojiva (2,20 ‰ do 3,20 ‰), a u tri šumska uzorka tla atmosferska depozicija dušika pridonijela je njegovom podrijetlu (0,00 ‰ do 3,24 ‰). Less

Abstract (english)

Nitrogen is an essential element for all living things on Earth. In nature nitrogen exists as a mixture of two stable isotopes (14N and 15N) and by its composition and proportion the environment and soil evolution can be characterize. The natural nitrogen isotopic signature (δ15N) in the terrestrial ecosystems is conditioned by the complexity of the nitrogen cycle and includes all its transformations and degrees of isotopic fractionation. The aim of this thesis was to determine the... More variability of total nitrogen and δ15N isotopes (nitrogen isotopic signature) in selected soils of the Republic of Croatia due to different land use. The research included the analysis of 27 archived soil samples collected in the period 2005-2020 as part of scientific work of employees of Department of general agronomy. Soil samples were collected from eleven locations in Croatia (Vukovar, Potok, Molve, Zagreb, Žumberak-Samoborsko gorje, Lepoglava, Karlovac, Gospić, Vodnjan, Pag, Mljet). Total nitrogen was determined by the dry combustion method, and δ15N isotope values by the EA-IRMS method. The research results indicate a range of δ15N values from 0.0 ‰ to +7.19 ‰, and total nitrogen content from 0.084 % to 0.991 %. In most of the observed soils (21 samples), the isotopic nitrogen signature indicates the organic origin of nitrogen in the soil (3.81 ‰ to 7.19 ‰), in three soil samples (two meadows soils and a ski slope soil) the nitrogen originates from mineral nitrogen fertilizers (2.20 ‰ to 3.20 ‰), while in three forest soil samples nitrogen atmospheric deposition contributed to its origin (0.00 ‰ to 3.24 ‰). Less

• Keywords: oranica; livada; šuma; voćnjak; δ15N
• Keywords (english): arable land; meadow; forest; orchard; δ15N
• Language: croatian
• URN:NBN: urn:nbn:hr:204:828541
• Study programme: Title: Organic Agriculture with Agrotourism; Study programme type: university; Study level: graduate; Academic / professional title: magistar / magistra inženjer/inženjerka ekološke poljoprivrede i agroturizma (magistar / magistra inženjer/inženjerka ekološke poljoprivrede i agroturizma)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to authenticated users
• Created on: 2022-11-24 08:21:17