Partial replacement of starch with acid detergent fibre and/or neutral detergent soluble fibre at two protein levels: Effects on ileal apparent digestibility and caecal environment of growing rabbits

Martínez-Vallespín, Beatriz; Martínez-Paredes, E.; Ródenas, L.; Moya, Victor; Cervera, C.; Pascual, Juan José Montero; Blas, E.

doi:10.1016/j.livsci.2013.02.012

Cited by 15 publications

(21 citation statements)

References 33 publications

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“…Consistently, fermentative activity estimated as the VFA concentration in caecal digesta was 26% higher in HSF than LSF diets. This effect of SF replacing starch has been also previously reported (Xiccato et al, 2011;Martínez-Vallespín et al, 2013;Trocino et al, 2013b;Soler, 2014;Ocasio-Vega et al, 2018), in accordance with caecal VFA concentration increasing linearly with dietary SF content (Trocino et al, 2013a). Higher VFA concentration in ileal digesta when SF replaced starch has been also reported (Ocasio-Vega et al, 2018).…”

Section: Soluble Fibre Replacing Starchsupporting

confidence: 84%

“…Higher VFA concentration in ileal digesta when SF replaced starch has been also reported (Ocasio-Vega et al, 2018). The effect on the caecal fermentation profile is controversial, as depending on the studies no changes (Trocino et al, 2013b; current study), an increase of butyrate at the expense of acetate (Martínez-Vallespín et al, 2013;Soler, 2014), and the opposite (Xiccato et al, 2011;Ocasio-Vega et al, 2018) have been observed. The discrepancies are probably due to methodological differences between experiments or/and to concurrent dietary changes induced by increasing SF at the expense of starch, which varied greatly between experiments, particularly those affecting the origin of the dietary soluble and, particularly, insoluble fibre.…”

Section: Soluble Fibre Replacing Starchmentioning

confidence: 61%

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Effect of increasing lignin in isoenergetic diets at two soluble fibre levels on digestion, performance and carcass quality of growing rabbits

Martínez-Paredes

Ródenas

Moya

et al. 2020

Animal Feed Science and Technology

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To assess the effect of increasing dietary lignin in isoenergetic diets at two soluble fibre (SF) levels on digestion, performance and carcass quality of growing rabbits, four diets were formulated according a 2×2 factorial design: low SF-low lignin (LSF/LL), low SF-high lignin (LSF/HL), high SF-low lignin (HSF/LL) and high SF-high lignin (HSF/HL). On average, in HSF diets SF was increased by 49 g/kg DM, mainly replacing starch (-53 g/kg DM), and in HL diets, lignin was increased by 40 g/kg, mainly reducing starch (-78 g/kg DM), with increasing EE (+31 g/kg DM). Two hundred and sixty crossbred weaned rabbits (35 days old) were assigned to the experimental diets, individually housed and fed ad libitum until 63 days of age. Digestibility (from 49 to 53 days old), growth performance (from 35 to 63 days old), carcass quality (at 63 days old) and caecal environment (at 63 days old) were studied in 12, 65, 45 and 16 rabbits per diet, respectively. High SF diets showed higher CTTAD of fibrous fractions (+0.206±0.011, +0.207±0.015, +0.214±0.011 and +0.167±0.015 for aNDFom, ADFom, hemicelluloses and cellulose, respectively, P<0.001), OM (+0.042±0. 004, P<0.001) and GE (+0.055±0.005, P<0.001), resulting in high DE content (10.6 vs. 9.30 MJ/kg DM). In contrast, CTTAD of CP was lower (-0.023±0.009, P=0.013), as well as the DP content (96.9 vs. 103 g/kg DM). This dietary variation reduced the DM content of caecal digesta (-28±3 g/kg, P<0.001), besides increasing its VFA concentration (+18.0±4.0 mmol/L, P<0.001) and reducing its pH (-0.28±0.05, P<0.001). Feed intake and LW gain decreased, with an improvement of feed to gain ratio (-13.8%, -4.7%, -9.4%, respectively; P<0.001).The proportion of gastrointestinal tract was increased, with a subsequent reduction in dressing out (+19±2 g/kg LW and -15±2 g chilled carcass weight/kg LW, respectively, P<0.001). High lignin diets showed lower CTTAD of OM (-0.055±0.004, P<0.001) and GE (-0.034±0.005, P<0.001) without affecting DE and DP contents. This dietary variation increased DM content of caecal digesta (+21±3 g/kg, P<0.001), but did not affect the other 2 caecal digesta traits. Feed intake was higher (+4.9%, P<0.001), although differences were dependent on the growth phase and the SF level (maximum difference at 35-49 days with low SF diets, +11.0%, P<0.001; minimum difference at 49-63 days with high SF diets, +1.0%, P=0.689), but did not affect LW gain and consequently impaired the feed to gain ratio (+5.1%, P<0.001). No effect was observed on dressing out, but the dissectible fat proportion increased (+6.7±1.1 g/kg reference carcass weight, P<0.001).

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Section: Soluble Fibre Replacing Starchsupporting

confidence: 84%

Section: Soluble Fibre Replacing Starchmentioning

confidence: 61%

Effect of increasing lignin in isoenergetic diets at two soluble fibre levels on digestion, performance and carcass quality of growing rabbits

Martínez-Paredes

Ródenas

Moya

et al. 2020

Animal Feed Science and Technology

Self Cite

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“…The quantification of soluble fibre in the digesta is more complex than in the diet/ingredients because the ethanol used to precipitate soluble fibre (in TDF analysis) also precipitates partially the intestinal mucins leading to an overestimation of ileal TDF content (Abad et al, 2013;Montoya et al, 2015). This seems to be the reason why the ileal digestibility of soluble fibre and TDF showed very low or even negative values both in rabbits (Gidenne, 1992;Martínez-Vallespín et al, 2013) and pigs (Jørgensen et al, 1996;Wilfart et al, 2007). A simple correction of digesta TDF values by the mucin carbohydrate fraction retained in the TDF residue was proposed by Abad et al (2013) and its application is essential when determining ileal digestibility of soluble fibre or TDF (especially in diets with low TDF or soluble fibre content) due to the relatively high ileal mucin content.…”

Section: Methods For Estimating the Dietary Fibre Content Of Animal Feedsmentioning

confidence: 99%

Fibre digestion.

Carabaño¹,

Abad-Guamán²,

Garcia³

et al. 2020

Nutrition of the Rabbit

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“…Meeting these requirements as accurately as possible with an adequate balance in essential nutrients can furthermore impact positively animal health. The literature has shown that in growing rabbits, an excess of dietary protein can contribute to a high incidence of mucoid enteropathy [ 5 , 6 , 7 , 8 ]. There are other studies, however, where the relationship between dietary protein and health status in growing rabbits is unclear [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Do Growing Rabbits with a High Growth Rate Require Diets with High Levels of Essential Amino Acids? A Choice-Feeding Trial

Marín-Garcia

López-Luján

Ródenas

et al. 2021

Animals

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As a consequence of the genetic selection process in growing rabbits, there are currently fast-growing animals exhibiting an average daily gain that may exceed 45 g/d. The protein requirements of these animals, namely amino acid requirements, may differ from animals with low growth rates. The objective of this work was to evaluate growth performance, the coefficient of total tract apparent digestibility (CTTAD), the apparent ileal digestibility (AID) of amino acids and nutrient retention of fast-growing rabbits when they had access to a diet with high levels of amino acids and/or a diet formulated with current nutritional recommendations in a choice-feeding trial. To this end, two diets were formulated: the M diet following current nutritional recommendations for growing rabbits (including 8.1, 5.8 and 6.9 g/kg dry matter (DM) of total lysine, sulphur amino acids and threonine, respectively) and the H diet with higher levels of total lysine, sulphur amino acids and threonine (9.4, 6.6 and 7.8 g/kg DM, respectively). A total of 220 weaned rabbits, from a paternal line selected for the growth rate, had free access to the M diet, the H diet or both (MH) diets from 28 to 63 days of age. The CTTAD of DM, crude protein and gross energy from 49 to 53 days of age as well as the AID of amino acids of the diets at 63 days of age were determined. Protein, amino acids and energy retained in the empty body from 28 to 63 days of age were also registered. No significant differences in growth performance, CTTAD, AID and nutrient retention between dietary treatments were observed. However, animals fed the H diet showed a higher AID of cysteine (p < 0.05) and higher threonine retention (p < 0.05) compared to the M diet. As regards the choice-feeding trial, MH animals showed a higher feed intake of the M diet compared to the H diet (+8.61%; p < 0.001), and furthermore, more than 50% of the animals preferred the M diet throughout the experimental period (p < 0.05). Our results suggest that animals with high growth rates do not show significantly higher productive traits when fed the H diet compared to the M diet. As regards choice feeding, MH animals were capable of choosing their preferred diet, showing high intra-individual repeatability in preference for the M diet. It would be interesting to continue studying this behaviour of choice based on amino acid levels.

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Partial replacement of starch with acid detergent fibre and/or neutral detergent soluble fibre at two protein levels: Effects on ileal apparent digestibility and caecal environment of growing rabbits

Cited by 15 publications

References 33 publications

Effect of increasing lignin in isoenergetic diets at two soluble fibre levels on digestion, performance and carcass quality of growing rabbits

Effect of increasing lignin in isoenergetic diets at two soluble fibre levels on digestion, performance and carcass quality of growing rabbits

Fibre digestion.

Do Growing Rabbits with a High Growth Rate Require Diets with High Levels of Essential Amino Acids? A Choice-Feeding Trial

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