Određivanje pronosa nitrata na padinskom tlu pomoću lizimetara i u kontroliranim uvjetima

master's thesis

• Title (english): Determination of nitrate transport on hillslope soil with lysimeters and experiments under controlled conditions
• Author: Ema Kober
• Mentor: Vilim Filipović (mentor)
• Committee member: Vilim Filipović (predsjednik povjerenstva)
• Committee member: Lana Filipović (član povjerenstva)
• Committee member: Igor Bogunović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Soil Amelioration); Zagreb
• Defense date and country: 2022-09-16, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

U uvjetima intenzivne poljoprivredne proizvodnje koristi se značajna količina gnojiva i sredstava za zaštitu bilja kako bi se osigurali visoki i stabilni prinosi. Ovim istraživanjem kvantificirao se pronos nitrata (NO3-) na padinskom tlu u procjednoj vodi kombinacijom terenskog monitoringa i istraživanja u kontroliranim uvjetima. Nitrati u uzorcima vode iz lizimetara određeni su spektrofotometrijski primjenom metode segmentiranog protoka na ionskom analizatoru, a nitrati iz uzoraka vode u kontroliranim uvjetima multiparametarskim fotometrom. Mjereni su i pH te električna vodljivost (E.C.) procjedne vode koristeći pH/EC metar. Najveća koncentracija NO3- isprana je iz kolone tla uzorkovane sa dna padine u rednom prostoru vinograda, a najmanja iz kolone tla uzorkovane sa vrha padine u međurednom prostoru vinograda. Statistički značajna razlika u koncentraciji s obzirom na položaj na padini utvrđena je za E.C. i NO3‒, dok za pH nije. Najveće vrijednosti E.C. i koncentracije NO3‒ bile su na dnu padine. Najmanji iznos E.C. izmjeren je na sredini padine, a najmanja koncentracija NO3‒ na vrhu padine. Rezultati sugeriraju da nagib terena ima statistički značajan utjecaj na koncentraciju nitrata u procjednoj vodi.

Abstract (english)

In intensive agricultural production significant amounts of fertilizers and plant protection products are used to ensure high and stable yields. This research quantified the transport of nitrates (NO3-) on hillslope soil by measuring its concentration in leachates and using a combination of field monitoring and research under controlled conditions. Nitrates in water samples from lysimeters were determined spectrophotometrically using the segmented flow method on an ion analyzer, and nitrate concentrations from water samples under controlled conditions were measured using multiparameter photometer. Leachate pH and electrical conductivity (E.C.) were also measured using pH/EC meter. The highest concentration of NO3‒ was leached from the soil column sampled from the bottom of the hillslope in the row area of the vineyard, and the lowest from the soil column sampled from the top of the hillslope in the interrow area. Statistically significant difference with respect to the position on the hillslope was found for E.C. and NO3‒ concentration, but not for pH. The highest values of E.C. and NO3‒ concentrations were at the bottom of the hillslope. The lowest E.C. was measured at the middle of the hillslope, and the lowest NO3‒ concentration was recorded at the top of the hillslope. Results suggest that the slope of the terrain has a statistically significant effect on the nitrate concentration in the leachate.

• Keywords: pronos nitrata; padinsko tlo; tlačni lizimetri; kolone s tlom; poljoprivreda
• Keywords (english): nitrate transport; hillslope soil; wick lysimeters; soil columns; agriculture
• Language: croatian
• URN:NBN: urn:nbn:hr:204:331698
• Study programme: Title: Agroecology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka agroekologije (magistar/ magistra inženjer/inženjerka agroekologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-09-22 10:25:37