Povezave med kondicijo krav in rastjo telet pri šarole in limuzin pasmi

Zajec, Boštjan (author), Žgur, Silvester (mentor), Voljč, Mojca (co-mentor)

Telesna kondicija pri domačih živalih je ocena založenosti s telesno maščobo in je pokazatelj prehranskega statusa. Pri reji krav dojilj je pomembno, da so krave v posameznem proizvodnem obdobju v optimalni kondiciji, saj je to povezano s proizvodnimi lastnostmi, plodnostjo in zdravstvenim stanjem živali. Na PRC Logatec smo v letu 2021 ocenjevali kondicijo pri kravah šarole in limuzin pasme v času od telitve do odstavitve. Namen naloge je bil preveriti vpliv spremembe kondicije krav na dnevne priraste (DP) telet v različnih obdobjih in na dobo med telitvama (DMT). Pri teletih krav limuzin pasme se je izkazalo, da je izboljšanje kondicije dojilj med 90. in 210. dnevom po telitvi ter med začetkom paše in 210. dnevom po telitvi pozitivno vplivalo na njihov prirast. Tako je bil DP od 90. do 210. dneva višji za 133,53 ± 58,62 g/dan, od začetka paše do 210. dneva po telitvi pa za 147,72 ± 65,96 g/dan, če se je kondicija mater v tem času povečala za eno oceno (na skali od 1 do 10). Pri kravah šarole pasme pa ni bilo povezav med njihovo spremembo kondicije in DP telet v različnih obdobjih. Sprememba kondicije od telitve do odhoda na pašo ni vplivala na DMT

• Language: Slovenian
• Keywords: govedo, pasme, limuzin, šarole, krave dojilje, kondicija, proizvodne lastnosti, plodnost
• Work type: Master's thesis/paper
• Organization: BF - Biotechnical Faculty
• Year: 2024
• PID: 20.500.12556/RUL-154158
• COBISS.SI-ID: 183576579
• Publication date in RUL: 28.01.2024

Secondary language

• Language: English
• Title: Relationships between the body condition score of Charolais and Limousin cows and the growth rate of their calves

Abstract

The body condition scoring is used to evaluate the body fat content and is an indicator of the nutritional status of the animal. It is very important that cows have optimal body condition in each production period between calving, as this is linked to health, reproduction and production performance. We have estimated the body condition scores of Charolais and Limousin suckler cows in 2021 on PRC Logatec. The body condition score was determined from calving to weaning. The aim of the study was to evaluate the effect of the change in the body condition score of the cows on the average daily weight gain of the calves in different time periods and on the length of the calving interval. The change in body condition of cows from 90 to 210 days after calving and from the beginning of grazing to 210 days after calving of Limousin cows affected the average daily gains of their calves in the same period. The average daily gain in the period from 90 to 210 days after calving and the average daily gain from the start of grazing to 210 days after calving were 133.53 ± 58.62 g/day and 147.72 ± 65.96 g/day higher if the body condition of the cows improved by one grade (on a scale of 1 to 10) in the respective periods. There was no such effect in Charolais cows. The change in body condition between calving and the start of grazing had no effect on the length of the calving interval.

• Keywords: cattle, breeds, Charolais, Limousin, suckler cows, body condition, production performance, reproduction