Effects of cereals and/or protein supplement extrusion on diet utilisation and performance of intensively reared cattle

Solanas, E.; Castríllo, C.; Fondevila, M.; Narváez, Q.O. Ruiz; Guada, J.A.

doi:10.1016/j.livsci.2007.12.014

Cited by 16 publications

(30 citation statements)

References 43 publications

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“…The reduction in the NDF content in the corn as a result of extrusion has also been observed in lupins, mixtures of pea with extruded rapeseed cakes, extruded cereals, and rapeseed cakes (Cros et al, 1991;Chapoutot and Sauvant, 1997;Solanas et al, 2008;Barchiesi and Anrique, 2011). This reduction may be due to a partial depolymerization of polysaccharides of the cell wall, make them more soluble in acid and alkaline solutions used in fiber analysis (Solanas et al, 2005).…”

Section: Nutritional Composition Of the Feedmentioning

confidence: 73%

Microbial protein synthesis in young steers fed with grass silage and extruded corn

Barchiesi-Ferrari

Anrique

2012

Chilean J. Agric. Res.

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Microbial protein synthesis is essential to meet protein requirements in ruminants. The aim of this investigation was to evaluate the effect of incorporating extruded corn (Zea mays L.) into the ration of young steers fed with grass silage on microbial protein synthesis (MPS). Twenty young steers in metabolic cages were used for supplying food. The treatments consisted of combinations of extruded corn (EC) and ground corn (GC) EC-10 (10% EC-30% GC); EC-25 (25% EC-15% GC) and EC-40 (40% EC-0% GC). These foods constituted 40% of the ration (DM-based) and the remaining 60% was grass silage. The MPS was calculated through the excretion of purine derivatives (PD) in the urine, using total collection of urine . The microbial protein absorption and flow of duodenal N also increased with a higher portion of extruded corn (EC-40, P < 0.05). The differences between treatments can be explained by the effect of corn extruding. This allows more energy available for ruminal bacteria and improved synchrony between energy and protein.

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Section: Nutritional Composition Of the Feedmentioning

confidence: 73%

Microbial protein synthesis in young steers fed with grass silage and extruded corn

Barchiesi-Ferrari

Anrique

2012

Chilean J. Agric. Res.

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“…The lower ammonia concentrations registered with extruded diets compared with diet NE could be due to the lower protein degradation observed with these diets (Table 4), especially with diet CPE, which showed the lowest protein degradation and ammonia concentration values. On the other hand, in an in vitro gas production trial, Solanas et al. (2004) found a higher fermentation rate of diets containing the CE, which could lead as well to a greater ammonia and preformed amino acid uptake by micro‐organism for protein synthesis, decreasing the ammonia concentration in ruminal fluid (Hristov et al., 2005).…”

Section: Discussionmentioning

confidence: 99%

“…The chemical composition of experimental treatments was scarcely affected by the extrusion of the ingredients (mean values of 172, 62 and 54 g/kg dry matter (DM) of crude protein, ether extract and crude fibre respectively); whereas the Gelatinization Index (GI) increased in all compounds including some extruded ingredient, particularly the cereal blend (GI of 25.9%, 92.6%, 45.7% and 83.8%, respectively, for NE, CE, PE and CPE), and the Nitrogen Solubility Index clearly decreased in compounds including the extruded protein supplement blend (60.5%, 53.0%, 31.6% and 28.6%, respectively, for NE, CE, PE and CPE) (Solanas et al., 2004).…”

Section: Methodsmentioning

confidence: 99%

“…The extrusion of concentrate has been shown to have some positive results in beef production, mainly in young animals (Serrano et al., 1998; Solanas et al., 2004). This effect would be related to different physicochemical modifications that extrusion produces in nutrients, affecting both carbohydrate and protein digestion.…”

Section: Introductionmentioning

confidence: 99%

“…Many authors have shown a decrease in the in situ protein degradability of different feed sources, mainly protein supplements, without an adverse effect on the post‐ruminal digestion of non‐degraded protein (Prestløkken, 1999; Solanas et al., 2005a) when conventional heat treatments are applied. On the other hand, extrusion leads to an extensive starch gelatinization that allows an increased rumen fermentation of cereals and compound feeds (Solanas et al., 2004, 2005b). Higher energy availability in rumen, because of starch gelatinization could lead to a higher microbial growth and increased bacterial protein flow to the duodenum.…”

Section: Introductionmentioning

confidence: 99%

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Effect of extruding the cereal and/or the legume protein supplement of a compound feed on in vitro ruminal nutrient digestion and nitrogen metabolism

Solanas

Castríllo

Calsamiglia

2007

Animal Physiology Nutrition

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An experiment was performed to evaluate the effect of extruding the cereal and/or the protein supplement of a compound feed for intensively reared calves on ruminal N metabolism using an in vitro culture system. A conventional compound feed was produced without extruding [treatment non-extruded (NE)], with the cereal blend extruded (CE), with the protein blend extruded (PE) and with both cereal and protein blends extruded (CPE). Four experimental diets, consisted of 0.90 of each experimental compound feed and 0.10 barley straw were assessed using dual-flow continuous-culture fermenters. (15)N infusion as ammonia sulphate was used to label the microbial population. Average NH(3) concentration in fermenter effluents ranged from 270 mg/l with diet NE to 69 mg/l for diet CPE (p < 0.05) and volatile fatty acid concentrations ranged from 161 mm in diet PE to 130 mm in diet CPE (p < 0.05). Diets PE and CPE showed a lower true organic matter degradability (49.5% and 48.2%) than NE and CE (52.8% and 52.2%). Non-ammonia nitrogen flow in effluents was highest on diet CPE, intermediate on diets CE and PE and lowest on diet NE (p < 0.01), reflecting the differences in dietary N flow and dietary protein degradability (71.2%, 63.7%, 61.2% and 50.0%, respectively, for NE, CE, PE, CPE; p < 0.001). In contrast, microbial protein synthesis efficiency was lower for treatments including the cereal blend extruded, although the resulted differences were only significant (p < 0.001) for CPE diet.

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Effect of pelleting and pellet size of a concentrate for intensively reared beef cattle on in vitro fermentation by two different approaches

Bertipaglia

Fondevila

Laar

et al. 2010

Animal Feed Science and Technology

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Effects of cereals and/or protein supplement extrusion on diet utilisation and performance of intensively reared cattle

Cited by 16 publications

References 43 publications

Microbial protein synthesis in young steers fed with grass silage and extruded corn

Microbial protein synthesis in young steers fed with grass silage and extruded corn

Effect of extruding the cereal and/or the legume protein supplement of a compound feed on in vitro ruminal nutrient digestion and nitrogen metabolism

Effect of pelleting and pellet size of a concentrate for intensively reared beef cattle on in vitro fermentation by two different approaches

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