Roles of dietary fibre and ingredient particle size in broiler nutrition

Kheravii, Sarbast K.; Morgan, Natalie K.; Swick, Robert A.; Choct, Mingan; Wu, Shu‐Biao

doi:10.1017/s0043933918000259

Cited by 54 publications

(44 citation statements)

References 114 publications

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“…By delaying the transit time in the GI tract, the microbiota could spend more time attacking and hydrolyzing the dietary fiber fraction of the diet ( Delzenne et al., 2007 , Hooda et al., 2011 , Neyrinck et al., 2012 , Singh et al., 2012 , Müller et al., 2018 ). In addition, diets containing large amounts of soluble dietary fiber, for example, viscous WE-AX, are known to slow down gut transit, thereby increasing nutrient digestibility ( Hooda et al., 2011 , Kheravii et al., 2018 , Müller et al., 2018 ). Our data for AXOS-fed broilers suggest that similar phenomena could be taking place.…”

Section: Discussionmentioning

confidence: 99%

“…Dietary components are the predisposing factors regulating the microbial, digestive, and health status of the broiler and hence broiler performance outcomes. Thus, the nutritional quality of the dietary ingredients is of critical importance in formulating broiler feeds ( Keerqin et al., 2017 , Kheravii et al., 2018 ). In European countries, wheat is a major source of energy in poultry diets.…”

Section: Introductionmentioning

confidence: 99%

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Arabinoxylan-oligosaccharides kick-start arabinoxylan digestion in the aging broiler

Bautil¹,

Verspreet²,

Buyse

et al. 2020

Poultry Science

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While arabinoxylans ( AX ), an important dietary fiber fraction of wheat-based broiler diets, are known for exerting antinutritional effects in the gastrointestinal ( GI ) tract of broilers, the prebiotic potential of arabinoxylan-oligosaccharides ( AXOS ) is also well-documented. However, inconsistent performance responses as well as the effectiveness of low amounts of AXOS used in diets of previously conducted experiments put into question the classical prebiotic route being the sole mode of action of AXOS. The objective of this study was to investigate the effects of dietary AXOS addition on the rate of AX digestion in the gastrointestinal tract of broilers as a function of broiler age to gain more insight into the mode of action of these oligosaccharides. A feeding trial was performed on 480 one-day-old chicks (Ross 308) receiving a wheat-based diet supplemented with or without 0.50% AXOS, containing no endoxylanases. Digesta samples from ileum and caeca and fecal samples were analyzed for AX content, AX digestibility, intestinal viscosity, and microbial AX-degrading enzyme activities at 6 different ages (day 5, 10, 15, 21, 28, 35). Chicks fed from hatching with 0.50% AXOS demonstrated a higher ileal viscosity ( P < 0.05). Also higher levels of AX solubilization and fermentation compared to control birds at 10 D were observed. This was noted by the higher total tract AX digestibility of water-extractable AX (WE-AX) and total AX (TOT-AX) at this age ( P < 0.05). Although no significant difference in AX-degrading enzyme activities was observed among the dietary treatments, AXOS supplementation in young broilers was shown to stimulate or “kick-start” dietary AX digestion, thereby speeding up the development of a fiber-fermenting microbiome in the young broiler. This stimulation effect of AXOS could enable greater functional value to be extracted from dietary fiber in broiler feeds.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Arabinoxylan-oligosaccharides kick-start arabinoxylan digestion in the aging broiler

Bautil¹,

Verspreet²,

Buyse

et al. 2020

Poultry Science

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“…Generally, a well-developed gizzard is associated with powerful contractions of the muscular layers, which not only ensures the complete grinding of the feed, but also increases intestinal refluxes, facilitating the mixing of the digesta with digestive enzymes [ 7 ]. It has been documented that diet composition is important to the development of the gizzard [ 33 ]. In this study, the increased relative weight of the gizzard in WB at both evaluating periods was a good indicator of improved functioning of the gizzard, which may contribute to improve nutrient digestibility.…”

Section: Discussionmentioning

confidence: 99%

The Impact of Wheat Bran on the Morphology and Physiology of the Gastrointestinal Tract in Broiler Chickens

Shang

Liu

et al. 2020

Animals

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There is increasing evidence showing that moderate amounts of insoluble dietary fiber can improve nutrient utilization by positively influencing the physiology of the gastrointestinal tract. The present study was conducted to investigate the effects of wheat bran as a source of insoluble fiber on nutrient digestibility, serum antioxidant status, gastrointestinal development, digestive enzyme activities and intestinal morphology in broiler chickens. A total of 96 one-day-old male Arbor Acre broiler chickens were assigned to two treatments with six replicate cages per treatment and eight birds per replicate for 42 d. Dietary treatments consisted of the control group (CON, control diet) and wheat bran group (WB, 30 g/kg wheat bran). Inclusion of WB increased (p < 0.05) the digestibility of dry matter, organic matter, gross energy and crude protein on Day 42. Birds fed WB had lower (p < 0.05) serum total cholesterol concentration on Day 21, and lower (p < 0.05) serum concentrations of low-density lipoprotein, total cholesterol and total triglyceride on Day 42. Inclusion of WB increased (p < 0.05) serum glutathione peroxidase activity on Day 21 and superoxide dismutase activity on Day 42, but tended (p = 0.07) to decrease serum malondialdehyde concentration on Day 21, and significantly decreased (p < 0.05) serum malondialdehyde concentration on Day 42. Birds fed WB had a greater (p < 0.05) relative weight of gizzard on both Day 21 and 42. Inclusion of WB increased (p < 0.05) activities of amylase and trypsin in pancreas and jejunal mucosa on Day 21, and increased (p < 0.05) amylase activity in pancreas and jejunal mucosa. Birds fed WB had greater (p < 0.05) villus height and villus height to crypt depth ratio in jejunum and ileum on Day 42. In conclusion, supplementation of 30 g/kg WB enhanced nutrient digestibility by improving antioxidant status, gizzard development, intestinal digestive enzyme activities and morphology of broilers.

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“…A number of studies have shown impaired broiler performance when birds are challenged with subclinical NE ( Cooper, 2007 , Timbermont et al., 2011 , Saleem, 2013 ). Most of studies also have shown improved broiler performance when broilers are fed fibre supplementation in their diets at different ages ( Hetland et al., 2003 , González-Alvarado et al., 2010 , Jimenez-Moreno et al., 2009 , Jimenez-Moreno et al., 2010 , Jiménez-Moreno et al., 2013a , Jiménez-Moreno et al., 2016 , Mateos et al., 2012 , Kheravii et al., 2016b ). The improvement in growth performance due to the addition of moderate amounts of structural fibre in the diet was more pronounced in young broilers ( Jimenez-Moreno et al., 2009 , Jimenez-Moreno et al., 2010 , Jiménez-Moreno et al., 2013a , Jiménez-Moreno et al., 2016 ).…”

Section: Discussionmentioning

confidence: 99%

“…It is speculated that structural fibres play an important role in enhancing performance and intestinal health by selectively stimulating the growth and/or activity of beneficial bacteria in gut. Insoluble fibre, a key component of structural fibres, certainly improves intestinal barrier function and host immunity by reducing pathogen load (e.g., Clostridia), and enhancing short chain fatty acid production ( Glenn and Roberfroid, 1995 , Amerah et al., 2009 , Choct, 2009 , Slavin, 2013 , Jiménez-Moreno et al., 2016 , Kheravii et al., 2016b ). It has also been reported that feeding broilers insoluble fibre improves gizzard function and stimulates mucosal layer, and increases gut motility, thereby reducing C. perfringens adhering to the mucosal surface in the distal part of the gastrointestinal tract ( Kalmendal et al., 2011 ).…”

Section: Introductionmentioning

confidence: 99%

Effect of oat hulls as a free choice feeding on broiler performance, short chain fatty acids and microflora under a mild necrotic enteritis challenge

et al. 2018

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Structure of fibre has been reported to enhance performance, intestinal function and modify the composition and quantity of the microbial population in the chicken gastrointestinal tract. It is hypothesised that insoluble fibre in oat hulls may improve gut health and reduce intestinal Clostridium perfringens number. This research assessed the effect of free choice oat hulls (OH) on performance and gut microbiota in broilers during a mild (subclinical) necrotic enteritis (NE) challenge. A total of 240 day-old male Ross 308 broiler chickens were assigned to 24 cages in a 2 × 2 factorial arrangement of treatments. Factors were challenge − or +; and OH − or +. On d 16, challenged broilers had lower weight gain and feed intake (P < 0.05) compared with unchallenged broilers. On d 16, broilers given OH had lower feed intake (P < 0.05) and tended to have lower (P = 0.062) feed conversion ratio (FCR) compared with those without access to OH. Broiler performance, however, was not affected by OH nor by challenge on d 24 and 35. The broilers given OH had heavier gizzards (P < 0.05) compared with those without OH at d 35 but not at d 13 or 16. Increased numbers of C. perfringens (P < 0.001) and reduced numbers (P < 0.05) of Lactobacillus and Salmonellae were observed in the caecal contents of challenged broilers on d 16. Challenged broilers had a lower concentration of caecal acetic acid (P < 0.01) compared with unchallenged broilers at d 16. The broilers given OH had lower concentrations of caecal acetic acid (P < 0.05), propionic acid (P < 0.05), and valeric acid (P < 0.01) compared with those without access to OH. An OH by challenge interaction on succinic acid concentration was observed on d 16 (P < 0.05). Oat hulls elevated the caecal succinic acid concentration only in the unchallenged broilers. This study indicated a positive role of OH through improved gizzard function and increased succinic acid in the gut but its role in controlling NE was not conclusive.

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Roles of dietary fibre and ingredient particle size in broiler nutrition

Cited by 54 publications

References 114 publications

Arabinoxylan-oligosaccharides kick-start arabinoxylan digestion in the aging broiler

Arabinoxylan-oligosaccharides kick-start arabinoxylan digestion in the aging broiler

The Impact of Wheat Bran on the Morphology and Physiology of the Gastrointestinal Tract in Broiler Chickens

Effect of oat hulls as a free choice feeding on broiler performance, short chain fatty acids and microflora under a mild necrotic enteritis challenge

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