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Vpliv glutamina in prebiotikov na kakovost jajčne lupine : diplomsko delo : univerzitetni študij = Effect of glutamine and prebiotics on egg-shell quality : graduation thesis : university studiesKorošec, Tamara, 1978-, zootehnikAbsorbcija mineralov je v pozni nesnosti omejena oz. zmanjšana, zaradi česar pride do motenj v presnovi mineralov in s tem posledično do slabše kakovosti jajčne lupine. V raziskavi smo preučevali ali ... je mogoče z dodajanjem glutamina (Gln) in prebiotikov v krmo, ugodno vplivati na prebavila in tako z izboljšanjem črevesne absorbcije izboljšati kakovost jajčne lupine in mineralno sestavo kosti pri kokoših v pozni nesnosti. Poskus smo optavili na 90 kokoših Ross 308, starih 60 tednov. Oblikovali smo pet skupin po 18 živali,ki smo jih krmili z različnimi aditivi. Prva skupina je bila kontrolna,trem skupinam smo dodajali Gln in sicer 0,65 %, 1,3 % in 1,95 % ter peti skupini prebiotski preparat Profeed v deležu 0,15 %. Živali so bile krmljene restriktivno s 158-162 g krme na dan, vodo pa so imele na voljo. Kokoši so imele dnevno 17 ur svetlobe in 7 ur teme. Količino zaužite krme smo spremljali tedensko. Jajca smo zbirali, tehtali, določili vsebnost surovega pepela (SP) in merili trdnost. Kokošim smo ob zakolu odvzeli stegnenico in v njej določili vsebnost SP, Ca, P in Mg. Rezultati kažejo, da se skupine krmljene z različno koncentracijo Gln in prebiotikom v začetni in končni telesni masi ter prirastu niso statistično značilno razlikovale med seboj. Dodatek Gln in prebiotika ni vplival na nesnost in povprečno maso jajc. Kokošiz najmanjšo nesnostjo (20-49 %), ki so dobivale Gln in prebiotik, so nesle težja jajca kot kokoši z večjo nesnostjo. Krmni dodatki prav tako niso vplivali na izboljšanje trdnosti jajčne lupine, na vsebnost SP v lupini in na zmanjšanje poškodb lupine. Če upoštevamo vpliv nesnosti, je bilo ob dodatku Gln in probiotika opazno izboljšuje v vsebnost SP, Ca, Mg in P v stegnenici pri kokoših z največjo nesnostjo (70-100 %). To kaže, da je dodatek Gln in prebiotika v krmi izboljšal oskrbo z mineralu, kar pa ni vplivalo na kakovost jajčne lupine.Type of material - undergraduate thesisPublication and manufacture - Domžale : [T. Frankič], 2003Language - slovenianCOBISS.SI-ID - 1487496
Author
Korošec, Tamara, zootehnik, 1978-
Other authors
Salobir, Janez |
Holcman, Antonija
Topics
jajca |
jajčna lupina |
prehrana živali |
perutnina |
kakovost |
kokoši |
krmni dodatki |
glutamin |
prebiotiki |
diplomske naloge
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Library | Call number – location, accession no. ... | Copy status |
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BF, Dept. of Animal Science, Ljubljana | Naloge Dn FRANKIč Vpliv pre IN: 120030271 |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Korošec, Tamara, zootehnik, 1978- | 25513 |
Salobir, Janez | 00886 |
Holcman, Antonija | 08187 |
Source: Personal bibliographies
and: SICRIS
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