Vpliv sezone na in vitro razgradljivost in fermentabilnost krmil v vampovem soku navadnega jelena (Cervus elaphus L.)

Andrej LAVRENČIČ, Darko VETERNIK

Povzetek


Prehod iz poletja v zimo povzroči spremembe v fiziologiji prebavnega trakta navadnega jelena in v tam prisotnih prebavnih procesih. Zato je bil namen raziskave ugotoviti, kako sezona vpliva na in vitro navidezno (ivNRSS) in pravo razgradljivost suhe snovi (ivPRSS), na kazalnike in vitro tvorbe plina in na sproščanje hlapnih maščobnih kislin (HMK) iz enajstih krmil, ki jih zauživajo ali dokrmljujemo košutam navadnega jelena v Sloveniji (plodovi kostanja in gradna ter želod in dva vzorca sveže trave, dva vzorca mrve in travne silaže, jabolčne tropine in koreni sladkorne pese). IvNRSS in ivPRSS, določeni z inkubacijo krmil v puferiranem vampovem soku, se med sezonama nista razlikovali, prav tako tudi nismo ugotovili velikih razlik pri večini kazalnikov produkcije plina. Le kazalnik »C« (specifična hitrost tvorbe plina) je bil večji (p < 0,05) v zimski sezoni. Tudi količine HMK so bile med sezonama zelo podobne. Vendar pa je bil delež ocetne kisline pogosto nekoliko večji pozimi kot jeseni (0,05 < p < 0,10), medtem ko sta bila deleža propionske in maslene kisline pri krmilih, ki so vsebovala več vlaknine, večja (0,05 < p < 0,10) jeseni kot pozimi. Nasprotno pa smo ob inkubaciji krmil, ki vsebujejo veliko škroba (želod in kostanj), določili večji (p < 0,05) delež propionske kisline pozimi, medtem ko je bil pri teh krmilih delež maslene kisline večji (p < 0,05) jeseni. Čeprav sta bila tako število uporabljenih substratov (n = 11) kot število živali (n = 6), darovalk vampovega soka, majhna, pa ti rezultati kažejo na spremembo presnove vampovih mikroorganizmov med jesenjo in zimo.

Ključne besede


navadni jelen; Cervus elaphus L.; prehrana živali; sezona; krmila; in vitro prebavljivost; in vitro produkcija plina; hlapne maščobne kisline; vamp

Celotno besedilo:

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Literatura


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DOI: http://dx.doi.org/10.14720/aas.2021.117.4.987

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