master's thesis
Influence of soil reaction to the potential of nitrogen mineralization soil

Marija Vuković (2015)
Josip Juraj Strossmayer University of Osijek
Faculty of agriculture
DEPARTMENT FOR AGROECOLOGY
Metadata
TitleUTJECAJ REAKCIJE TLA NA POTENCIJAL MINERALIZACIJE DUŠIKA U TLU
AuthorMarija Vuković
Mentor(s)Krunoslav Karalić (thesis advisor)
Abstract
Na temelju provedenog laboratorijskog pokusa inkubacije uzoraka tla tijekom 4 tjedna utvrđen je potencijal mineralizacije dušika za 30 uzoraka tla različite pH reakcije tla mjerenjem koncentracije nitratnog dušika u tlu. Uzorci su podijeljeni u 5 skupina na temelju pH vrijednosti tla: slabo alkalna, neutralna, slabo kisela, jako kisela i izrazito kisela tla s područja istočne Hrvatske te je analizirana povezanost sadržaja ukupnog dušika u tlu, sadržaja mineralnog dušika u tlu, te intenziteta disanja tla sa utvrđenom razinom mineralnog dušika u nitratnom obliku nakon 28 dana inkubacije. Ukupna razina mineralnog dušika u nitratnom obliku kao indikatora potencijala tla za mineralizaciju dušika je pokazala rapidan porast nakon prvih 7 dana inkubacije koji je iznosio 168,5 % u odnosu na početno stanje. Uzimajući u obzir podjelu uzoraka tla prema pH vrijednosti, najveći intenzitet mineralizacije je utvrđen za neutralna tla koji je iznosio 3,49 mg/kg/dan odnosno 138,7 % u odnosu na početno stanje. Za slabo kisela i kisela tla, te slabo alkalna tla utvrđen je prosječan porast u odnosu na početno stanje. Podjelom uzoraka tla prema pH reakciji za skupinu slabo alkalnih tala je zabilježen vrlo značajan pozitivan međuodnos između potencijala mineralizacije dušika i sadržaja mineralnog dušika u tlu (0,957**), sadržaja humusa (0,910**), sadržaja ukupnog dušika u tlu (0,905**) te je podjelom tala prema pH reakciji moguće ostvariti veću preciznost izračuna predviđene potencijalne mineralizacije dušika u tlu primjenom regresijskih jednadžbi osim za neutralna tla jer nisu utvrđene značajne korelacije između potencijala mineralizacije dušika iz promatranih svojstava tla.
Keywordsincubaion potential of nitrogen mineralisation soil reaction respiration intensity
Parallel title (English)Influence of soil reaction to the potential of nitrogen mineralization soil
Committee MembersBrigita Popović
Vladimir Ivezić
GranterJosip Juraj Strossmayer University of Osijek
Faculty of agriculture
Lower level organizational unitsDEPARTMENT FOR AGROECOLOGY
PlaceOsijek
StateCroatia
Scientific field, discipline, subdisciplineBIOTECHNICAL SCIENCES
Agronomy
Ecology and Environmental Protection
Study programme typeuniversity
Study levelgraduate
Study programmeEcological Agriculture
Academic title abbreviationmag. ing. agr.
Genremaster's thesis
Language Croatian
Defense date2015-09-30
Parallel abstract (English)
By the laboratory examination conducted on the soil incubation samples through 4 weeks, it was determined potential of nitrogen mineralisation for 30 samples of the soil with different pH reactions by measurements for nitrate nitrogen concentration in the soils. Samples are divided in 5 categories based on: slightly alkaline, neutral, slightly acid, strong acid and extreme acidity from east Croatia territory and is also analised relationship content amount in overall mineral nitrogen form after 28 days of incubation. Total level of mineral nitrogen in form as an indicator for the mineralisation soil potential has indicated rapid growth after first 7 days of incubation which was 168,5 % considering initial state. Considering classification samples by pH value, most significant mineralisation intensity has been established for neutral soils which was 3,49 mg/kg/day (138,7 %) considering initial state. For slightly acid, acid soils and alkaline soils it has been determined average increase considering initial state. By classification for neutral soils it was registered specisficaly significant interrelationship between content of mineral nitrogen in the soils (0,957**), humus content (0,910**), content of overall nitrogen in the soils (0,905**) and by classification of the soils by pH reaction it is possible to realize higher calculation accuracy for provided potential nitrogen mineralisation in the soils by using regression equations with exeption for neutral soils because there is no significant correlation between potential of nitrogen mineralisation from observed feature of the soil.
Parallel keywords (Croatian)inkubacija potencijal mineralizacije dušika reakcija tla intenzitet disanja tla
Resource typetext
Access conditionOpen access
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
Notediplomski rad
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:151:053754
CommitterLjiljana Vučković Vizentaner