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Ekološka prireja jajc : diplomsko delo : univerzitetni študij = Ecological egg production : graduation thesis : university studiesDrev, BernardaNa ekološki kmetiji v kurnici z izpustom smo v jati 50 prelux-G kokoši eno leto spremljali nesnost, spreminjanje telesne mase in porabo krme. Enkrat mesečno smo na vzorcu 30 jajc ocenili fizikalne ... lastnosti jajc. Rezultate smo primerjali s proizvodnimi rezultati enako starih 113 prelux-G kokoši v baterijski reji. V ekološki reji je kokoš v 52 tednih znesla povprečno 293 jajc in povprečna nesnost je bila 80,5 %, v baterijski reji pa je znesla 303 jajca in povprečna nesnost je bila 83,2 %. V 72. tednu starosti so kokoši povprečno tehtale 2,4 kg v ekološki, in 2,5 kg v baterijski reji. Kokoši v ekološki reji so pojedle več krme (135,4 g/dan, brez krme, ki so jo pojedle v izpustu) ter dosegle slabšo konverzijo krme (178,1 g krme/jajce) kot kokoši v baterijski reji, ki so pojedle 120.3 g/dan in 147,6 g krme za eno jajce. Jajca kokoši iz ekološke reje so bila lažja za 0,34 g, imela so višji gosti beljak za 0,17 mm, za 1,10 enote večjo vrednost HE, za 4,84 % svetlejšo jajčno lupino, za 0,13 g lažjo lupino, za 1,51 mg/cm2 manjšo maso lupine na enoto površine ter za 2,75 enote svetlejši jajčni rumenjak kot jajca iz baterijske reje. Reja je statistično značilno vplivala (p<0,05) na vse fizikalne lastnosti jajc, razen na maso jajc in debelino lupine. Jajca iz ekološke reje so v povprečju vsebovala manj krvnih in mesnih peg (13,0 %) kot jajca iz baterijske reje (42,6 %). V obeh rejah smo na podlagi ocenjevalne sheme v 36. in 72. tednu starosti ocenjevali poškodovanost perja in povrhnjice kokoši. Ob koncu celoletne nesnosti so bile kokoši v ekološki reji bolje operjene.Type of material - undergraduate thesisPublication and manufacture - Ljubljana : [B. Drev], 2004Language - slovenianCOBISS.SI-ID - 1608072
Author
Drev, Bernarda
Other authors
Holcman, Antonija |
Salobir, Janez
Topics
perutnina |
kokoši |
nesnice |
pasme |
prelux-G |
jajca |
ekološka reja |
baterijska reja |
fizikalne lastnosti |
Slovenija |
diplomske naloge
Library/institution |
City | Acronym | For loan | Other holdings |
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BF, Zootechnical Department, Ljubljana | Domžale | BFZOO |
reading room 1 cop.
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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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Drev, Bernarda | |
Holcman, Antonija | 08187 |
Salobir, Janez | 00886 |
Source: Personal bibliographies
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