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master's thesis
Utjecaj sezone na sadržaj ureje u mlijeku Holstein i simentalskih krava
Zagreb: University of Zagreb, Faculty of Agriculture, 2016. urn:nbn:hr:204:956371
Goleš, Vilma
University of Zagreb
Faculty of Agriculture
Animal Science and Technology

Institutional repository: Repository Faculty of Agriculture University of Zagreb

Cite this document

Goleš, V. (2016). Utjecaj sezone na sadržaj ureje u mlijeku Holstein i simentalskih krava (Master's thesis). Zagreb: University of Zagreb, Faculty of Agriculture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:204:956371

Goleš, Vilma. "Utjecaj sezone na sadržaj ureje u mlijeku Holstein i simentalskih krava." Master's thesis, University of Zagreb, Faculty of Agriculture, 2016. https://urn.nsk.hr/urn:nbn:hr:204:956371

Goleš, Vilma. "Utjecaj sezone na sadržaj ureje u mlijeku Holstein i simentalskih krava." Master's thesis, University of Zagreb, Faculty of Agriculture, 2016. https://urn.nsk.hr/urn:nbn:hr:204:956371

Goleš, V. (2016). 'Utjecaj sezone na sadržaj ureje u mlijeku Holstein i simentalskih krava', Master's thesis, University of Zagreb, Faculty of Agriculture, accessed 21 December 2024, https://urn.nsk.hr/urn:nbn:hr:204:956371

Goleš V. Utjecaj sezone na sadržaj ureje u mlijeku Holstein i simentalskih krava [Master's thesis]. Zagreb: University of Zagreb, Faculty of Agriculture; 2016 [cited 2024 December 21] Available at: https://urn.nsk.hr/urn:nbn:hr:204:956371

V. Goleš, "Utjecaj sezone na sadržaj ureje u mlijeku Holstein i simentalskih krava", Master's thesis, University of Zagreb, Faculty of Agriculture, Zagreb, 2016. Available at: https://urn.nsk.hr/urn:nbn:hr:204:956371

Metadata
TitleUtjecaj sezone na sadržaj ureje u mlijeku Holstein i simentalskih krava
AuthorVilma Goleš
MentorAnte Ivanković (mentor)
Committee memberAnte Ivanković (predsjednik povjerenstva)
Committee memberDubravka Samaržija (član povjerenstva)
Committee memberMiljenko Konjačić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Agriculture
(Animal Science and Technology)
Zagreb
Defense date and country2016-09-29, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Agronomy
Dairy
Abstract
Sadržaj ureje u kravljem mlijeku jedan od primjenjivih indikatora opskrbljenosti mliječnih krava proteinima i energijom. Na njen sadržaj utječu brojni faktori od kojih je sezona prepoznata kao jedan važan čimbenik. Sezona na sadržaj ureje u mlijeku djeluje neposredno preko utjecaja mikroklimatskog okruženja odnosno posredno preko hranidbe mliječnih krava. Cilj istraživanja bio je utvrditi značajnost utjecaja sezona na sadržaj ureje u mlijeku krava. Istraživanjem je obuhvaćeno 6.057 analitičkih zapisa sadržaja ureje u mlijeku za 880 mliječnih krava simentalske i Holstein pasmine. Prosječni sadržaj ureje u mlijeku za obje pasmine bio je 27,31mg/mL. Samo se 31,74 % mliječnih krava obzirom na poželjni sadržaj ureje i proteina u mlijeku nalazilo u hranidbeno energetsko-proteinskom balansu. Utvrđen je značajan (P<0,01) utjecaj sezone na sadržaj ureje u mlijeku krava. Veći sadržaj urejeu mlijeku od preporučenog tijekom proljetnih i ljetnih mjeseci treba korigirati menadžment hranidbe stada. Zapažena je pozitivna korelacija između sadržaja ureje u mlijeku naspram dnevne količine mlijeka i udjela mliječne masti (P<0,05), dok je korelacija između sadržaja ureje u mlijeku i udjela proteina u mlijeku imala negativan predznak (P<0,05).
Abstract (english)
The content of urea in cow's milk is one of the applicable indicators supply cows with proteins and energy. On ureas content affected by many factors of which the season is recognized as one of important factors. On the urea concentration in milk seasons acts directly through the influence of microclimate environment or indirectly by feeding cows. The goal of the research was to examine the effect of the seasons on the content of urea in milk of cows. The study included 6,057 analytical records of concentration of urea in milk of 880 cows of Simmental and Holstein breed. Average concentration of urea in milk was 27.31 mg / ml. Only 31.74% of cows due to the desirable content of urea and protein in milk were in the feeding energy-protein balance. A significant (P <0.01) effect of season on the content ofurea in milk of cows was found. The higher concentration of urea in milk than recommended during the spring and summer months should be corrected to Management feeding of the flock. The positive correlation was observed between the content of urea in milk in relation to daily quantity of milk and of milk fat content (P<0.05), while the correlation between the content of urea in milk and protein contentis negative (P <0.05).
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:204:956371
Study programmeTitle: Production and Processing of Milk
Study programme type: university
Study level: graduate
Academic / professional title: magistar / magistra inženjer/inženjerka proizvodnje i prerade mlijeka (magistar / magistra inženjer/inženjerka proizvodnje i prerade mlijeka)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2017-01-26 10:56:36