Dnevni prirast ovnov v direktnem testu na testni postaji Logatec : magistrsko delo

Baša, Naja (avtor), Simčič, Mojca (mentor)

Namen magistrske naloge je bil proučiti dnevne priraste ovnov jezersko-solčavske in oplemenjene jezersko-solčavske pasme v direktnem testu na testni postaji Logatec. V raziskavo smo vključili 1.606 ovnov, testiranih v obdobju od leta 2014 do 2024. Podatke smo pridobili iz Centralne podatkovne zbirke Drobnica. Preučevali smo vplive pasme, velikosti gnezda, zaporedne jagnjitve, starosti ob uhlevitvi v izolatorij, izvornega rejca in sezone na dnevni prirast. Ugotovili smo, da so na dnevni prirast od rojstva do uhlevitve v izolatorij statistično značilno vplivali velikost gnezda, zaporedna jagnjitev in starost ob uhlevitvi v izolatorij. Enojčki so v tem obdobju priraščali največ (237,03 g/dan), sledili so trojčki in četverčki (230,02 g/dan) ter dvojčki (225,81 g/dan). Jagnjeta iz četrte zaporedne jagnjitve so priraščala najbolje, 239,88 ± 3,71 g/dan. Bolje so priraščali ovni, ki so bili ob uhlevitvi v izolatorij mlajši. Razlika med pasmama je bila samo v dnevnem prirastu od rojstva do uhlevitve v izolatorij, kjer so ovni jezerskosolčavske pasme dosegli 226,01 g/dan, ovni oplemenjene jezersko-solčavske pasme pa 235,90 g/dan, razlika pa je bila na meji statistične značilnosti. Na dnevni prirast v času direktnega testa na testni postaji sta statistično značilno vplivala zaporedna jagnjitev in starost ob uhlevitvi v izolatorij. Najbolje so priraščala jagnjeta mater, ki so imele 8. zaporedno jagnjitev (171,24 ± 4,91 g/dan). Starost ob uhlevitvi v izolatorij kot linearna regresija je pokazala negativen trend, saj so mlajši ovni ob uhlevitvi, dosegli večji dnevni prirast v času direktnega testa kot starejši. Delež pojasnjene variance za vpliv izvornega rejca na dnevne priraste je bil največji (46,9 %) v obdobju med rojstvom in uhlevitvijo v izolatorij. Delež pojasnjene variance za vpliv sezone na dnevne priraste je bil največji (82,9 %) v obdobju med uhlevitvijo v izolatorij in prvim tehtanjem.

• Jezik: Slovenski jezik
• Ključne besede: ovce, pasme, jezersko-solčavska ovca, oplemenjena jezersko-solčavska ovca, prirast, lastni preizkusi, magistrska dela
• Vrsta gradiva: Magistrsko delo/naloga
• Tipologija: 2.09 - Magistrsko delo
• Organizacija: BF - Biotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Kraj izida: Ljubljana
• Založnik: N. Baša
• Leto izida: 2026
• Št. strani: 1 spletni vir (1 datoteka PDF (VII, [40] str.))
• PID: 20.500.12556/RUL-188565
• UDK: 636.3(043.2)
• COBISS.SI-ID: 292970499
• Datum objave v RUL: 24.09.2026

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Daily gain of rams in the performance test at the test station Logatec : M. Sc. thesis

Izvleček

The aim of this master’s thesis was to examine the daily gains of rams of the JezerskoSolčava and Improved Jezersko-Solčava breeds in a performance test at the Logatec testing station. The study included 1,606 rams tested between the years 2014 and 2024. Data were obtained from the Central Database for Small Ruminants. We examined the effects of breed, litter size, parity, age at entry into the isolation pen, breeder of origin, and season on daily gains. We found that litter size, parity, and age at entry into the isolation pen had a significant effect on daily gain between birth and entry into the isolation pen. Single lambs gained the most weight during this period (237.03 g/day), followed by triplets and quadruplets (230.02 g/day) and twins (225.81 g/day). Lambs from the 4th parity gained 239.88 ± 3.71 g/day. Rams that were younger at the time of transfer to the isolation pen gained weight more effectively. The difference between the breeds was in the daily gain between birth and entry into the isolation pen, where the Jezersko-Solčava breed rams achieved 226.01 g/day, while the Improved JezerskoSolčava breed rams reached 235.90 g/day, the difference was on the borderline of significance. Daily gain during performance test at the test station was significantly affected by parity and age at entry into the isolation pen. The lambs of ewes in their 8th parity gained the most weight (171.24 ± 4.91 g/day). Age at entry into the isolation pen, as a linear regression, showed a negative trend, as younger rams at entry achieved higher daily gain during the performance test than older ones. The proportion of variance explained by the effect of the breeder of origin on daily gains was the highest (46.9%) in the period between birth and entry into the isolation. The proportion of variance explained by the effect of season on daily gains was the highest (82.9%) during the period between transfer to the isolation and the first weighing.

• Ključne besede: sheep, breeds, Jezersko-Solčava sheep, Improved Jezersko-Solčava sheep, daily gain, performance testing