diplomsko delo
Marina Nemec (Avtor), Vida Rezar (Recenzent), Marija Klopčič (Mentor)

Povzetek

Novorojeno tele je zaradi neprepustnosti placente brez imunskega sistema, zato je kakovostno mlezivo ključno za pasivno zaščito teleta, v prvih dneh življenja. Mlezivo se precej razlikuje po sestavi v primerjavi z mlekom. Vsebuje veliko Ig, predvsem IgG, beljakovin, maščob, mineralov in vitaminov. Novorojeno tele mora čimprej po rojstvu zaužiti vsaj 3 litre kakovostnega mleziva. S tem zagotovimo uspešen pasivni transport Ig. Na kakovost mleziva vplivajo številni dejavniki, kot so pasma, starost krave – zaporedna laktacija, prehrana krav v času presušitve, okolje, sezona telitve, dolžina presušitve in iztekanje mleziva med telitvijo. Kakovost mleziva oziroma vsebnost Ig v mlezivu lahko ugotavljamo s pripomočki kot so kolostrometer, refraktometer in digitalni refraktometer. Ocenimo pa ga lahko tudi vizualno, kar pa ni zanesljivo. Na osnovi znane kakovosti mleziva se odločimo ali je mlezivo primerno za napajanje novorojenih telet ali ne. Za namen diplomske naloge smo na domači kmetiji spremljali kakovost mleziva pri 13 kravah pri prvih 10 molžah po telitvi. Ugotovili smo, da so bile najvišje vrednosti za imunoglobuline ugotovljene pri prvi molži po telitvi. Potem pa so se vrednosti imunoglobulinov zelo hitro zmanjševale z vsako naslednjo molžo. V našem primeru so najvišje vsebnosti imunoglobulinov imele krave križanke.

Ključne besede

govedo;krave molznice;mlezivo;kakovost;dejavniki;diplomske naloge;

Podatki

Jezik: Slovenski jezik
Leto izida:
Tipologija: 2.11 - Diplomsko delo
Organizacija: UL BF - Biotehniška fakulteta
Založnik: [M. Nemec]
UDK: 636.2(043.2)
COBISS: 210417155 Povezava se bo odprla v novem oknu
Št. ogledov: 26
Št. prenosov: 4
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarni naslov: Influences on the quality of colostrum in dairy cows
Sekundarni povzetek: The newborn calf is born without an immune system due to the impermeability of the placenta, making high-quality colostrum crucial for the passive protection of the calf in the first days of life. Colostrum differs significantly in composition compared to milk. It contains high levels of immunoglobulins (Ig), primarily IgG, along with proteins, fats, minerals, and vitamins. The newborn calf must consume at least 3 litres of high-quality colostrum as soon as possible after birth. This ensures the successful passive transfer of immunoglobulins. Several factors affect colostrum quality, such as breed, cow age – parity, cow nutrition during the dry period, environment, calving season, dry period length, and colostrum leakage during calving. The quality of colostrum, or its Ig content, can be assessed using tools like a colostrometer, refractometer, or digital refractometer. Visual assessment is also possible, though not reliable. Based on the known quality of colostrum, we can decide whether it is suitable for feeding newborn calves. For the purpose of this thesis, we monitored colostrum quality of 13 dairy cows on a family farm during the first 10 milkings after calving. We found that the highest immunoglobulin levels were detected during the first milking post-calving. Immunoglobulin levels then rapidly decreased with each subsequent milking. In our study, the highest immunoglobulin content was found in crossbred cows.
Sekundarne ključne besede: cattle;dairy cows;colostrum;quality;factors;
Vrsta dela (COBISS): Diplomsko delo/naloga
Študijski program: 0
Komentar na gradivo: Univ. v Ljubljani, Biotehniška fak., Oddelek za zootehniko
Strani: 1 spletni vir (1 datoteka PDF (IX, 24 str.))
ID: 25151970