Primerjava mlečnosti prvesnic črnobele pasme glede na izvor

magistrsko delo

Maja Vocovnik (Author), Marjan Janžekovič (Mentor)

Abstract

Prireja mleka ima v Sloveniji dolgo tradicijo. Govedoreja se je od sredine devetdesetih let 20. stoletja koncentrirala in specializirala, kar se izraža v zmanjševanju števila rejcev, povečevanju povprečne velikosti črede na gospodarstvo, rasti mlečnosti krav in v večji kakovosti mleka. V Sloveniji se soočamo z neurejenim trgom plemenske živine, kar predstavlja za rejce, ki želijo kupiti večje število plemenskih živali, velik problem. V izogib temu vse več rejcev izvaja nakup plemenskih živali v tujini v upanju, da bodo kupili genetsko boljše živali kot v Sloveniji. V naši raziskavi smo poskušali ugotoviti, ali obstajajo razlike v proizvodnih parametrih prvesnic, ki so bile pripeljane iz Danske kot breje telice v primerjavi s slovenskimi vrstnicami. Kmetija A in kmetija B sta iz Danske v letu 2019 uvozili vsaka po 17 brejih telic črnobele pasme z namenom, da bi povečali število živali in izboljšanji genetski potencial. Ugotovili smo, da so danske telice statistično značilno (P < 0,01) telile mlajše, namolzle več ECM, priredile več beljakovin (kg) in maščob (kg) ter dosegle višji delež beljakovin v mleku. S tem ugotavljamo, da so uvožene prvesnice v ključnih proizvodnih parametrih boljše od slovenskih vrstnic.

Keywords

krave molznice;črnobela pasma;prireja mleka;proizvodne lastnosti;

Data

Language:	Slovenian
Year of publishing:	2021
Typology:	2.09 - Master's Thesis
Organization:	UM FKBV - Faculty of Agriculture
Publisher:	[M. Vocovnik]
UDC:	636.2.082:637.12(043)=163.6
COBISS:	78022403
Views:	305
Downloads:	33
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Milk yield comparison of primiparous holstein cows based on their origin
Secondary abstract:	Milk production has a long tradition in Slovenia. Cattle breeding has been concentrated and specialized since the mid-1990s, which is reflected in a reduction in the number of breeders, an increase in the average herd size per farm, an increase in the milk yield per cow and a higher milk quality. In Slovenia, we are facing an unregulated market for breeding livestock, which is a big problem for farmers who want to buy larger numbers of breeding heifers. To avoid this, more and more farmers are buying breeding heifers abroad in hope that they will buy genetically superior animals than in Slovenia. In our research, we tried to determine whether there are differences in the production traits of primiparous cows that were imported from Denmark as pregnant heifers compared to Slovenian peers. In 2019, Farm A and Farm B, each imported 17 pregnant Holstein heifers from Denmark, with the aim of increasing the number of animals and improving their genetic potential. We found that Danish heifers calved statistically significantly (P
Secondary keywords:	dairy cows;holstein cows;milk production;production traits;
Type (COBISS):	Master's thesis/paper
Thesis comment:	Univ. v Mariboru, Fak. za kmetijstvo in biosistemske vede
Pages:	IX, 22 str.
ID:	13291318