magistrsko delo
Jure Ferlin (Author), Marina Pintar (Mentor), Valentina Usenik (Thesis defence commission member), Helena Grčman (Thesis defence commission member), Damijana Kastelec (Co-mentor)

Abstract

V okviru projekta LIFE ViVaCCAdapt - Prilagajanje na vplive podnebnih sprememb v Vipavski dolini, smo na 31 sodelujočih kmetijskih gospodarstvih odvzeli porušene in neporušene vzorce tal. Trije vzorci so spadali v teksturni razred MGI (meljasto glinasta ilovica), štiri v I (ilovica), eden v GI (glinasta ilovica) ter 23 vzorcev v MI (meljasta ilovica). V nalogi smo želeli ugotoviti potencialne razlike v umeritvenih funkcijah, nastalih zaradi dveh različnih postopkov umerjanja, z neporušenimi in porušenimi vzorci tal. Odčitek sonde o vsebnosti vode v tleh smo preverili z gravimetrično določitvijo vsebnosti vode v vzorcu tal. Ugotovili smo, da je tovarniška umeritev merilnikov MVZ 100 predvsem v suhih tleh, kjer merilniki precej precenijo vsebnost vode, netočna. Pri dveh različnih pristopih umerjanja, v neporušenih in porušenih vzorcih tal, na intervalu rastlinam razpoložljive vode (brez meritev v nasičeno mokrih in zelo suhih tleh) nismo zaznali znatnih odstopanj v obliki umeritvene funkcije. Predlagamo, da se v praksi za izvedbo talno specifičnega umerjanja uporablja metoda z neporušenimi vzorci tal. Metoda s porušenimi vzorci tal je delovno intenzivna in časovno zelo potratna. Ugotovili smo, da je za potrebe učinkovitega namakanja poleg talno specifično umerjenega merilnika potrebno posebno pozornost nameniti tudi določitvi vodozadrževalnih lastnosti tal.

Keywords

vsebnost vode;tla;merilniki;umerjanje;namakanje;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [J. Ferlin]
UDC: 634.432:631.67(043.2)
COBISS: 166636035 Link will open in a new window
Views: 10
Downloads: 2
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Other data

Secondary language: English
Secondary title: Calibration of a soil moisture sensor in disturbed and undisturbed samples of selected soils
Secondary abstract: We collected disturbed and undisturbed soil samples from 31 agricultural farms which were participating in the LIFE ViVaCCAdapt project - Adapting to the impacts of Climate Change in the Vipava Valley. Three soil samples were recognized as silty clay loam, four as loam, one as clay loam, and 23 as silt loam. In this study, we aimed to identify potential differences in calibration functions resulting from two different calibration procedures using undisturbed and disturbed soil samples. Soil moisture probe readings were verified by gravimetric determination of the soil water content. We found that the factory calibration of the MVZ 100 probes were inaccurate in dry soils, where they considerably overestimated soil water content. For the two different calibration approaches using undisturbed and disturbed soil samples, within the range of plant-available water (excluding measurements in saturated and very dry soils), we did not detect significant deviations in the shape of the calibration function. For future work we suggest, that the method using undisturbed soil samples is used to perform soil-specific calibration. The method using disturbed soil samples in intensive and very time-consuming. We also found that for effective irrigation special attention needs to be paid to the determination of soil water retention properties, in addition to using a soil-specific calibrated probe.
Secondary keywords: water content;soil;sensors;calibration;irrigation;
Type (COBISS): Master's thesis/paper
Study programme: 0
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za agronomijo
Pages: 1 spletni vir (1 datoteka PDF (IX, 33 str., [2] str. pril.))
ID: 20020628