Utjecaj dodatka sirutke na kemijski sastav fermentirane krme poluprirodnog travnjaka

Scientific paper - Original scientific paper

• Title (english): The effect of whey supplementation on the chemical composition of fermented forage
• Author: Mateo Papac
• Author: Marina Vranić
• Author: Monika Nekić
• Author: Nataša Pukec Pintić
• Author: Andreja Babić
• Author: Ivica Vranić
• Author: Krešimir Bošnjak:
• Author's institution: University of Zagreb; Faculty of Agriculture
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract (croatian)

Cilj istraživanja bio je utvrditi utjecaj dodatka sirutke u prahu biljnoj masi poluprirodnog travnjaka na kemijski sastav i pH vrijednost fermentirane krme. U istraživanju je analizirano pet razina dodatka sirutke u prahu biljnoj masi poluprirodnog travnjaka kod siliranja u laboratorijske silose: (i) 0 %; (ii) 3 %, (iii) 6 %, (iv) 12 % i (v) 24% dodane sirutke. Laboratorijski silosi su otvoreni 47. dan od zatvaranja radi utvrđivanja pH vrijednosti i sadržaja suhe tvari (ST) fermentirane krme. NIR aparatom je procijenjen kemijski sastav fermentirane krme: sadržaj sirovih proteina (SP), sirovih masti (SM), sirovih vlakana (SV), pepela i ne dušićnih ekstraktivnih tvari (NET). S povećanjem dodatka sirutke u prahu biljnoj masi kod siliranja utvrđeno je linearno povećanje sadržaja ST (P<0,001) fermentirane krme. Utvrđen je statistički značajan kvadratni trend dodatka sirutke u prahu na sadržaj SP (P<0,001) i sadržaj SM (P<0,001). Dodatkom sirutke u prahu (od 3 % do 24 %) biljnoj masi prilikom siliranja utvrđeno je linearno opadanje sadržaja SV u fermentiranoj krmi (P<0,001). Sadržaj pepela se nije statistički značajno razlikovao između istraživanih tretmana (P>0,05). Dodatak sirutke u prahu je snizio pH vrijednost fermentirane krme (P<0,05). Zaključeno je da preporučena količina sirutke u prahu koju bi trebalo dodati biljnoj masi poluprirodnog travnjaka sadržaja ST oko 30 % prilikom siliranja je različita za pojedine kemijske parametre. Za snižavanje pH vrijednosti dovoljno je dodati 3% sirutke u prahu, za povećanje sadržaja ST 6 % dok za smanjenje sadržaja vlakana 24 %.

Abstract (english)

The objective of the study was to determine the effect of dried whey supplementation at ensiling on chemical composition and quality of fermented forage originated from semi-natural grassland. The study consists of 5 levels of dried whey supplemented to forage at ensiling into laboratory siloses: (i) 0%; (ii) 3%, (iii) 6%, (iv) 12% and (v) 24%. After 47 days fermentation the laboratory siloses, the pH value of fermented forage and the dry matter content (DM) were determinedd. The NIR instrument was applied to predict the chemical composition and quality parameters of fermented forage: crude protein (CP), crude fat (CF), ash and non-nitrogen extractives (NET). With an increase in dried whey supplementation at ensiling, a linear increase in the DM content (P<0.001) of fermented forage was found. A statistically significant square trend of whey powder supplementation to CP content (P <0.001) and CF content (P<0.001) was found. The whey supplementation (from 3% to 24%) to forage at ensiling showed a linear decrease in CF content in fermented forage (P<0.001). The ash content did not differ significantly between the investigated treatments (P>0.05). The whey supplementation lowered the pH of the fermented forage (P<0.05). It was concluded that the recommended quantity of whey powder that should be added to semi-natural forage ensiled at about 30% is different for individual chemical parameters. To lower the pH value, it is enough to add 3% whey powder, to increase the content of ST 6% while to reduce fiber content by 24%.

• Keywords (croatian): poluprirodni travnjak; sirutka u prahu; fermentirana krma
• Keywords (english): semi-natural grassland; whey powder; fermented fodder
• Language: croatian
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - domestic
• Publication version: Published version
• Journal title: Stočarstvo : Časopis za unapređenje stočarstva
• Numbering: vol. 76, no. 1-2, pp. 3-12
• p-ISSN: 0351-0832
• e-ISSN: 1848-9044
• DOI: https://doi.org/10.33128/s.76.1-2.1
• URN:NBN: urn:nbn:hr:204:295792
• Publication: 2022
• Document URL: https://hrcak.srce.hr/280919
• Type of resource: Text
• Access conditions: Open access
• Repository: Repository Faculty of Agriculture University of Zagreb
• Created on: 2024-02-07 09:00:34