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Ocenjevanje vsebnosti presnovljive energije in neto energije za laktacijo v mrvi in travnih silažah : diplomsko delo : univerzitetni študij = Estimation of metabolizable energy and net energy for lactation content in hays and grass silages : graduation thesis : university studiesŽnidaršič, Tomaž, zootehnikaŠtiridesetim vzorcem mrve in 38 vzorcem travnih silaž smo na podlagi podatkov o kemični sestavi in volumnu plina, ki se razvije v 24 urah pri inkubaciji vzorcev z vampnim sokom in vitro izračunali ... presnovljivo energijo (ME) in netoenergijo za laktacijo (NEL). Te vrednosti smo primerjali z vrednostmi dobljenimi na podlagi kemične sestave in DLG preglednic ter vrednostmi dobljenimi na podlagi regresijskih enačb iz literature. Povprečno absolutno odstopanje uradnih nemških regresijskih enačb (GfE..., 1998) od naših rezultatov IVHPT znaša pri silažah 0,5 MJ NEL kg [gor]-1 sušine (SS), pri mrvi pa okrog 0,3 MJ NEL kg[gor]-1 SS. S pomočjo DLG preglednic iz leta 1991 ter 1997 se NEL pri mrvi in silažah razlikuje od vrednosti dobljenih s pomočjo IVHPT za 0,3+-0,31 MJ kg[gor]-1 SS in 0,58+-0,44 MJ kg [gor]-1 SS ter 0,28+-0,36 MJ kg [gor]-1 SS in 0,46+-0,42 MJ kg [gor]-1 SS. Novejše DLG preglednice (1991, 1997) in uradne nemške regresijske enačbe (GfE..., 1998) so primerne za ocenjevanje vzorcev mrve in silaž, ki vsebujejo več kot 5,3 in 5,5 MJ NEL kg[gor]-1 SS. Med DLG preglednicami so bile najbolj primerljive z rezultati IVHPT preglednice iz leta 1982, ki so NEL pri mrvi in silažah podcenile za 0,17+-0,35 MJ kg[gor]-1 SS in 0,4+-0,49 MJ kg[gor]-1 SS. Ugotovili smo, da je mogoče mrvo razmeroma primerljivo z rezultati IVHPT oceniti s pomočjo regresijske enačbe po Stekarjevi in sod. (1994). Vsebnost NEL se je od naših rezultatov razlikovala za -0,14+-0.33 MJ kg[gor]-1 SS. Tudi pri najbolj primerljivih ocenah znaša povprečno absolutno odstopanje od in vitro vrednosti 0,3 MJ NEL kg[gor]-1 SS, v nekaterih primerih pa so posamezni vzorci odstopali tudi za več kot 1 MJ NEL kg[gor]-1 SS. Enake ugotovitve veljajo tudi za vsebnost presnovljive energije (ME), saj sta z NEL v linearnem sorazmerju.Type of material - undergraduate thesisPublication and manufacture - Domžale : [T. Žnidaršič], 2001Language - slovenianCOBISS.SI-ID - 1157000
Author
Žnidaršič, Tomaž, zootehnika
Other authors
Verbič, Jože |
Lavrenčič, Andrej, 1965-
Topics
govedo |
krave |
molznice |
prehrana živali |
laktacija |
presnovljiva energija |
neto energija za laktacijo |
krma |
mrva |
travna silaža
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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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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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DRS, in which the journal is indexed
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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Žnidaršič, Tomaž, zootehnika | 22606 |
Verbič, Jože | 10035 |
Lavrenčič, Andrej, 1965- | 11889 |
Source: Personal bibliographies
and: SICRIS
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