20.500.12556/RUL-184966 Primerjava hranilne vrednosti travnih silaž z različnih kmetijskih gospodarstev magistrsko delo Comparison of the nutritional value of grass silages from different farms M. Sc. thesis V magistrskem delu smo primerjali hranilno vrednost in kakovost travnih silaž z različnih kmetijskih gospodarstev, analiziranih pri predmetu Znanost o krmi. Namen raziskave je bilo ovrednotiti hranilno vrednost in kakovost analiziranih travnih silaž ter glede na vsebnosti hranljivih snovi in kazalcev kakovosti ugotoviti razlike med vzorci in med leti ter zaporednimi košnjami. V raziskavo je bilo vključenih 98 vzorcev travnih silaž, analiziranih med letoma 2022 in 2026 na Biotehniški fakulteti, Oddelku za zootehniko. Vzorce so prispevali študenti s svojih ali bližnjih kmetij, pri čemer so bili v analizo namerno vključeni tudi vzorci slabše kakovosti. Študenti so vzorce organoleptično ocenili ter opravili kemijsko analizo, ki je vključevala celotno wendsko analizo, določanje detergentske vlaknine (NDV, KDV), rudninskih snovi ter kazalnikov kakovosti silaže (pH, hlapne maščobne kisline in amonijakov dušik). Iz kemijske sestave smo izračunali vsebnost brezdušičnega izvlečka, nevlaknastih ogljikovih hidratov, presnovljive energije (ME) in neto energije za laktacijo (NEL). Za obdelavo podatkov smo uporabili statistični program SAS/STAT. Rezultati so pokazali veliko variabilnost med vzorci. V primerjavi z literaturo so bile analizirane slovenske travne silaže v povprečju bolj suhe in energijsko revnejše. Povprečne vsebnosti kazalcev kakovosti so bile večinoma znotraj priporočenih vsebnosti, kar kaže, da so silaže v povprečju dobre kakovosti. Med posameznimi leti in zaporednimi košnjami so bile ugotovljene statistično značilne razlike za nekatere vsebnosti hranljivih snovi, za kazalce kakovosti je bila statistična razlika med leti, med zaporednimi košnjami pa ni bilo statističnih razlik. Rezultati kažejo, da na hranilno vrednost travnih silaž v Sloveniji pomembno vpliva čas košnje oziroma zrelost trave. In the master's thesis, we compared the nutritional value and quality of grass silage from different farms, analyzed in the course of Feed Science. The purpose of the research was to evaluate the nutritional value and quality of the analyzed grass silages and, based on the content of nutrients and quality indicators, to determine differences between samples and between years and successive cuttings. The research included 98 samples of grass silages analyzed between 2022 and 2026 at the Biotechnical Faculty, Department of Animal Science. The samples were contributed by students from their own or nearby farms, with samples of poorer quality intentionally included in the analysis. The students evaluated the samples organoleptically and performed a chemical analysis, which included a complete proximate analysis, determination of detergent fiber (NDF, ADF), mineral substances and silage quality indicators (pH, volatile fatty acids and ammoniacal nitrogen). From the chemical composition, we calculated the nitrogen-free extract, non-fiber carbohydrates, metabolizable energy (ME) and net energy for lactation (NEL) content. The statistical program SAS/STAT was used to process the data. The results showed a large variability between samples. Compared to the literature, the analyzed Slovenian grass silages were on average drier and lower in energy. The average contents of quality indicators were mostly within the recommended contents, which indicates that the silages are on average of good quality. Statistically significant differences were found for some nutrient contents between individual years and successive cuttings, for quality indicators there was a statistical difference between years, but there were no statistical differences between successive cuttings. The results show that the nutritional value of grass silages in Slovenia is significantly affected by the time of cutting or the maturity of the grass. prehrana živali krma travna silaža hranilna vrednost kakovost silaže magistrska dela animal nutrition feed grass silage nutritional value silage quality true false false B. Šink Slovenski jezik Angleški jezik Magistrsko delo/naloga 2026-07-19 07:15:10 2026-07-19 07:15:26 2026-07-20 10:41:19 0000-00-00 00:00:00 2026 0 Ljubljana 2026 Ljubljana 1 spletni vir (1 datoteka PDF (IX, [41] str.)) 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 636.084/.087(043.2) 282210 285398531 59244.pdf 59244.pdf 1 4CDC96247B753F5031651F69D8006204 f27b0fe0f5e42980fe046233a86b40e9605574aa800d2202c046e3dc76ddef8b ad782170-8330-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=240427 Biotehniška fakulteta 0 0 0