Carbon balances for in vitro digestion and fermentation of potential roughages for pregnant sows

摘要: Abstract Ad libitum feeding of pregnant sows requires satiating, intake-restricting feed components to prevent from getting excessively fat. Because hindgut fermentation starts only after and proceeds much slower than enzymatic digestion in the small intestine, products might, as nutrients, induce a prolonged physiological satiation sows. To simulate determine fermentative release short-chain fatty acids (SCFA) vitro, gas production tests (GPTs) were performed with different raw materials removal enzymatically hydrolysable compounds. Fresh feces that received standard sow was used inoculum. Fresh, ensiled, or dehydrated by-products food industry (brewers’ grains, liquid yeast feed, maize gluten potato chips, steam peel, pressed pulp, sugar beet pulp (SBP)) whole-plant (grass, maize) tested individual products. Balances drawn up vitro flow organic carbon (OC) an “ileal” nutrient fraction, “hindgut” fraction SCFA gas, “fecal” remnants. The OC balances revealed large variations among terms their contribution fractions. Potato peel gave largest (77% total OC), lowest observed fresh (9% OC). In GPT, SBP, brought about highest yields (32–49% together amounts gas. Grass fermented most by-products. Moreover, larger portions by-products, exception brewer’s grains. Together straw, latter least degradable all tested. Among grass products, grass, chips left residues, i.e. they nutritionally utilized extent.