In vitro ruminal fermentation, methane production and nutrient degradability as affected by fruit and vegetable pomaces in differing concentrations

• DOI: 10.1111/jpn.13656
• Publication Date: 2021-10-27T04:41:02Z
• Authors: Katrin Giller; Laura Bossut; Lukas Eggerschwiler; Melissa Terranova
• Keywords: Pomace; Tannin; Neutral Detergent Fiber; Condensed tannin

Pomaces are food industry by-products and may serve as animal feed to increase sustainability of meat milk production. The aim the present study was evaluate fermentation characteristics dried fruit vegetable pomaces in a short-term vitro experiment using Hohenheim Gas Test. A selection six (apple, aronia, orange, pomegranate, red, white grape) three (beetroot, carrot, tomato) tested concentrations (150, 300, 500 g kg-1 dry matter (DM)) supplement basal diet (hay, used control). Three runs were performed, rumen fluid from one different rumen-cannulated cows each run. Per run, compound duplicate. After 24 h incubation, total gas production, methane CO2 concentration, short-chain fatty acids, organic digestibility well microbial counts determined. In addition, pomaces' polyphenol content including fractions non-tannin phenols, condensed tannins hydrolysable analysed. Most did not significantly affect any dosages thus be applied ruminant nutrition without adverse effects. Aronia decreased (-14.5%) highest concentration whereas apple (+12%), carrot (+10%) beetroot (+8%) increased formation related digestible matter. dosage pomegranate by about 28% impairing digestibility. Pomegranate only pomace those high that contained exceptionally amounts (90% tannins) proportionally low (10% tannins), indicating most likely reduced Therefore, an interesting option for mitigating ruminants should considered following vivo testing.