Rumen gas kinetics : a comparative analysis of two in vitro assessment methods for forage evaluation

Valcl, Nejc (author), Lavrenčič, Andrej (author)

Gas production from thirty samples of feedstuffs (10 samples of corn silage, grass silage, and grass hay, respectively) was assessed in vitro using two methods: the Hohenheim gas test (HGT) and the ANKOM RF Gas Production System (ANKOM). Samples were incubated in buffered rumen fluid. Gas kinetic parameters were calculated using the Gompertz model. Results revealed significantly lower gas production with the ANKOM compared to the HGT. Significant differences were observed between the HGT and ANKOM in the specific gas production rate (parameter C), maximum fermentation rate (MFR) and gas produced after 24 h of incubation (Gas24) for each feed group. High coefficients of determination (R2) were calculated between the methods for the gas kinetic parameters MFR, Gas24, total potential gas production (parameter B), decrease in the specific gas production rate (parameter A), moderate R2 for C, and low R2 for time of maximum fermentation rate (TMFR). Despite the lower quantities of gas generated with the ANKOM, there are strong correlations in the parameters of gas kinetics that promise the possibility of developing correction models. Future development of such models could position the ANKOM as a viable alternative to HGT, particularly for calculating metabolizable energy and net energy for lactation in feedstuffs.

• Language: English
• Keywords: animal nutrition, rumen, gas production, gas kinetic parameters, Ankom RF Gas Production System, Hohenheim Gas Test
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publication version: Version of Record
• Year: 2024
• Number of pages: 7 str.
• Numbering: Letn. 120, št. 1
• PID: 20.500.12556/RUL-163130
• UDC: 636.084/.087
• ISSN on article: 1854-1941
• DOI: 10.14720/aas.2024.120.1.16702
• COBISS.SI-ID: 206986755
• Publication date in RUL: 02.10.2024

Record is a part of a journal

• Title: Acta agriculturae Slovenica
• Publisher: Biotehniška fakulteta, Oddelek za agronomijo in Oddelek za zootehniko, Biotehniška fakulteta, Oddelek za agronomijo in Oddelek za zootehniko, Univerza v Ljubljani, Biotehniška fakulteta, Založba Univerze v Ljubljani
• ISSN: 1854-1941
• COBISS.SI-ID: 219581184

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Title: Kinetika plinov v vampu
• Keywords: prehrana živali, vamp, produkcija plinov, kinetika produkcije plinov, parametri, metoda ANKOM, Hohenheimski plinski test