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Kemijska sestava in prebavljivost organske snovi trav košenih v različnih razvojnih fazah = Chemical composition nad organic matter digestibility of grasses harvested at different morphological stagesLavrenčič, Andrej, 1965- ; Orešnik, Andrej, 1943-2016Šest vrst trav, mnogocvetno ljulko (Lolium multiflorum), trpežno ljulko (lolium perenne), pasjo travo (Dactylis glomerata), mačji rep (Phleum pratense), rdečo bilnico (Festuca rubra) in travniško ... bilnico (Festuca pratensis) smo vzorčili večkrat znotraj štirih košenj, da bi ugotovili vpliva zaporednega vzorčenja (zrelosti) in zaporedne košnje na kemijsko sestavo in invitro prebavljivost organske snovi (IVPOS). Ugotovili smo, da se s starostjo (zrelostjo) trav povečuje vsebnost rastlinske celične stene (vlaken, netopnih v nevtralnem detergentu; NDV) in njenih sestavin (surove vlaknine, SVI; vlaken, netopnih v kislem detergentu, KDV in ligniga, netopnega v kislem detergentu, KDL), medtem ko se vsebost surovih beljakovin (SB) in IVPOS zmanjšuje. Razlike v vsebnosti teh hranljivih snovi, pri zaporednih vzorčenjih druge košnje niso bile statistično značilne. Vsebnost SB se z zaporedno košnjo povečuje, medtem ko se vsebnost SVI, NDV, KDV in KDL med prvo in drugo košnjo povečajo, potem pa zmanjšujejo do jesenske košnje. Ravno obratno pa se IVPOS do druge košnje zmanjša, potem pa do jesenske košnje povečuje. Takšne spremembe vsebnosti so značilne za zaporedne košnje prvega vzorčenja, medtem ko med košnjama drugega in tretjega vzorčenja ni bilo statističnih razlik. Z IVPOS je bila najbolje povezana vsebnost KDV (r=-0,83, P<0,001). Analizirani vzorci vsebujejo manj SB in IVPOS ter več SVI kot jih navajajo DLG preglednice (1997), vendar so razlike znotraj posameznih trav občutne.Type of material - conference contributionPublish date - 2000Language - slovenianCOBISS.SI-ID - 1054344
Author
Lavrenčič, Andrej, 1965- |
Orešnik, Andrej, 1943-2016
Topics
krma |
trave |
organska snov |
in vitro prebavljivost |
zrelost |
košnja
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Lavrenčič, Andrej, 1965- | 11889 |
Orešnik, Andrej, 1943-2016 | 00486 |
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