In vitro acidification potential and fermentation pattern of cereal grains incubated with inoculum from animals given forage or concentrate based diets

Amanzougarene, Z (Universidad de Zaragoza) ; Yuste, S. (Universidad de Zaragoza) ; Castrillo, C. (Universidad de Zaragoza) ; Fondevila, M. (Universidad de Zaragoza)

Resumen: This work aimed to study the acidification and fermentation pattern of maize (M1, M2, M3), barley (B1, B2, B3) and sorghum (S1, S2, S3) varieties depending on the rumen environment (inoculum from forage or concentrate diets, FI or CI), in 10 h incubation series with a low buffered medium. With CI, gas volume from barley was similar to maize (P > 0.05) except at 4 and 6 h, when M2 and M1 were lower. Barley or maize varieties did not differ in gas production (P > 0.05). After 10 h, barley and maize produced on average 82.5 and 73.0 mL/g organic matter (OM), whereas S1, S2 and S3 rendered 68.4, 31.1 and 39.7 mL/g. With FI, differences between barley and maize were detected after 6 h (61.0, 35.3 and 14.1 mL/g OM at 10 h for barley, maize and sorghum). Among inocula, pH with CI was lower than with FI (P < 0.001). Incubation pH at 10 h was 5.51, 5.21 and 5.00 with CI, and 5.52, 5.85 and 5.91 with FI, for sorghum, maize and barley varieties. Gas production and total volatile fatty acid (VFA) concentration were higher (P < 0.001) with CI than FI (67.3 vs 36.8 mL/g and 31.0 vs 19.9 mmol/L at 10 and 8 h). Butyrate and valerate proportions were higher with CI (P < 0.001), whereas acetate and branched chain VFA were lower (P < 0.001). Fermentative activity against vitreous starch such as maize or sorghum was lower for forage than concentrate inoculum. Study of fermentation of starch-rich substrates in a low buffered medium gives a more realistic picture than conventionally buffered conditions.

Idioma: Inglés

DOI: 10.1071/AN16425

Año: 2018

Publicado en: ANIMAL PRODUCTION SCIENCE 57, 12 (2018), 2300-2307
ISSN: 1836-0939

Factor impacto JCR: 1.275 (2018)

Categ. JCR: AGRICULTURE, DAIRY & ANIMAL SCIENCE rank: 26 / 61 = 0.426 (2018) - Q2 - T2

Factor impacto SCIMAGO: 0.631 - Food Science (Q2) - Animal Science and Zoology (Q2)

Financiación: info:eu-repo/grantAgreement/ES/MICINN/AGL2013-46820

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Producción Animal (Dpto. Produc.Animal Cienc.Ali.)