Effect of feed restriction programs and slaughter age on digestive efficiency, growth performance and body composition of growing rabbits

Birolo, Marco; Trocino, A.; Zuffellato, A.; Xiccato, Gerolamo

doi:10.1016/j.anifeedsci.2016.10.014

Cited by 28 publications

(59 citation statements)

References 23 publications

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“…According to Gidenne et al (2009a), the decrease in feed intake level from 100 to 90, 80, 70 and 60% of ad libitum linearly enhanced feed conversion at the expense of daily growth and final LW. Only the mildest feed restriction (90% of ad libitum) improved feed conversion (3% compared to the control group) without worsening growth performance (Gidenne et al, 2009a), as confirmed in other trials (Birolo et al, 2016; present study).…”

Section: Effect Of Feed Restrictionsupporting

confidence: 76%

“…Under our condition, however, feed restriction did not affect nutrient digestibility coefficients (Table 3), as also found by Birolo et al (2016) in rabbits submitted to mild feed restriction rates (93% of ad libitum intake). In fact, in the present study, the digestibility trial took place during the 3 rd wk when R and L rabbits showed similar feed intake.…”

Section: Effect Of Feed Restrictionmentioning

confidence: 60%

“…Thus, feed restriction decreased body N at 55 d (P<0.001), as well as total N ingestion (-3.2%; P<0.05), and daily N excretion (-3.7%; P<0.05) in the whole trial (34-69 d) (Table 6). Similarly, other authors (Gidenne et al, 2013a;Birolo et al, 2016) found that both severe and mild feed restriction rates play a key role in reducing N excretion on rabbit farms due to the higher feed efficiency in comparison with ad libitum feeding.…”

Section: Effect Of Feed Restrictionmentioning

confidence: 99%

“…In fact, feed restriction may not prevent large changes in individual feed intake when rabbits are housed collectively and restricted on a quantitative base (Gidenne et al, 2009a;Knudsen et al, 2014), or when housed individually and restricted on the base of the access time to feeders (Romero et al, 2010). Differently, even a mild feed restriction (93% of ad libitum) during the first period may improve rabbit health status without impairing growth performance, slaughter results and carcass traits in rabbits housed individually and submitted to quantitative feed restriction (Birolo et al, 2016). High digestible energy (DE) diets are also currently used during fattening to optimise feed conversion (Maertens, 2010), whereas low-DE diets are usually fed during post weaning to reduce the risk of enteric diseases (Gidenne et al, 2010;Maertens and Gidenne, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Effect of feed restriction and feeding plans on performance, slaughter traits and body composition of growing rabbits

et al. 2017

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Two feeding systems (L, ad libitum vs. R, feed restriction) were combined with 3 feeding plans (MM, MH, HH) to evaluate the effects on performance, slaughter results, body composition and nitrogen balance of 300 commercial crossbred rabbits kept individually from weaning to slaughter (34-70 d of age). The R rabbits were fed from 80% (first days on trial) to 100% (end of 3 rd wk) of ad libitum intake, whereafter R rabbits had free access to feed. The 3 feeding plans were: MM plan, M diet with moderate digestible energy (DE) content, 10.6 MJ/kg, throughout the trial; HH plan, H diet with high DE content, 11.1 MJ/kg, throughout the trial; MH plan, M diet for the first 3 wk and H diet for the last 2 wk. Feed restriction did not affect nutrient digestibility, growth rate on the whole trial and slaughter results, but improved feed conversion (2.96 vs. 2.89 in L and R rabbits, respectively; P<0.01) and reduced N excretion (2.16 vs. 2.07 g excreted N/d, in L and R rabbits; P<0.05). At the end of the first period (55 d), R rabbits showed lower empty body protein, lipid, and gross energy gains than L rabbits, but differences disappeared within the end of the trial. The HH plan improved feed conversion (2.97 vs. 2.89 for MM vs. HH; P<0.05), but increased excreted N (2.03 vs. 2.17 g/d; P<0.001) in comparison with the MM plan due to the higher digestible protein/DE ratio of H diet, whereas the MH plan showed intermediate results. In conclusion, a moderate feed restriction during post weaning improved feed conversion and reduced N excretion without negative effects on growth or slaughter results. Moreover, N excretion was confirmed to depend largely on dietary nitrogen content.

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Section: Effect Of Feed Restrictionsupporting

confidence: 76%

Section: Effect Of Feed Restrictionmentioning

confidence: 60%

Section: Effect Of Feed Restrictionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of feed restriction and feeding plans on performance, slaughter traits and body composition of growing rabbits

et al. 2017

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“…En parallèle, l'indice de consommation technique (ICt) est amélioré de 10 à 15 % (figure 8b), mais avec une assez grande variabilité qui peut dépendre de la composition chimique de l'aliment. Des résultats similaires ont été enregistrés pour des systèmes cunicoles italiens (Birolo et al, 2016). L'application d'une restriction de 25 % entraîne une réduction de 34 % des débits fécaux (53 à 35 g MS/j), du fait d'une meilleure efficacité digestive (Gidenne et al, 2017a).…”

Section: Stratégie D'alimentation Et Indice De Consommationunclassified

Efficacité alimentaire en cuniculture : voies d'améliorations, impacts technico-économiques et environnementaux

Maertens

DROUILHET

2019

INRA Prod. Anim.

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Comme l'alimentation est le premier poste composant le coût de production (± 60 % du coût total) en élevage, la mesure de l'efficacité alimentaire est un indicateur majeur pour juger la performance et la rentabilité d'un élevage. L'amélioration de l'efficacité alimentaire est aussi un enjeu pour réduire l'impact environnemental de l'élevage, par la réduction des rejets animaux et une moindre production de matières premières alimentaires. Cette efficacité se mesure couramment par l'indice de consommation, et en cuniculture conventionnelle, l'indice de consommation économique (ICe = maternité+engraissement) a été réduit de 10 % (3,8 vs 3,4) ces 15 dernières années, de même que les rejets azotés et phosphorés. Cette amélioration provient des progrès conjoints sur la maîtrise sanitaire, l'alimentation (notamment les stratégies de restriction), la maîtrise du logement et le potentiel génétique des animaux. Cette article de synthèse résume l'impact de ces facteurs pour améliorer l'efficacité alimentaire en cuniculture conventionnelle. Après la gestion sanitaire, les performances reproductives du troupeau sont un levier majeur d'amélioration de l'ICe. L'usage d'aliments préservant la santé digestive du lapin en croissance, associé à une stratégie appropriée de restriction post-sevrage sont aussi de bons leviers. Les recherches en génétique peuvent contribuer à réduire l'ICe par 2 voies, l'amélioration de la vitesse de croissance et/ou la réduction de la consommation d'aliment à croissance fixée. L'impact environnemental de la cuniculture varie entre 7,6 et 10,5 kg d'équivalent CO2/kg de carcasse produite (légèrement supérieure au poulet) et ne diffère pas de celui du porc. À l'avenir, il semble possible d'améliorer encore l'efficacité alimentaire, et donc de réduire à la fois les intrants et les rejets, pour atteindre un ICe proche de 3,0 similaire aux systèmes porcins.

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Effects of feeding methods on growth and slaughter performance, blood biochemical indices, and intestinal morphology in Minxinan black rabbits (Oryctolagus cuniculus)

Chen

Sun

Chen

et al. 2023

Trop Anim Health Prod

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Feed restriction after weaning is a common strategy used in commercial rabbit farms to improve feed efficiency, promote health, and reduce mortality. However, few studies have investigated the feed restrictions of Minxinan black rabbits (Oryctolagus cuniculus). Thus, the effects of feed restriction on growth and slaughter performance, intestinal morphology, and blood biochemical indices of Minxinan black rabbits were evaluated in this study. Rabbits in group A (control group) had ad libitum intake, while those in feed restriction groups (groups B, C, and D) were restricted to 80% of the average daily feed intake (ADFI) of group A the day before. The rabbits in group B were fed once per day at 8:00 am. Rabbits in groups C and D were fed twice per day at 8:00 am (50%) and 4:00 pm (50%) and 8:00 am (30%) and 4:00 pm (70%), respectively. The experimental period lasted for 8 weeks. Compared to that in group A, the diarrhea rate of group C was significantly decreased (P < 0.05), and the ADFI, feed conversion ratio, abdominal fat weight, abdominal fat rate, total protein, albumin, globulin, alanine aminotransferase (ALT), low-density lipoprotein, and intestinal crypt depth of all feed restriction groups were significantly reduced (P < 0.01). Feed conversion ratio in group D was significantly better than that in groups B and C (P < 0.05). The efficiency index (EI) of groups C and D was higher than that of groups A and B (P < 0.01). Triglyceride levels in groups C and D were significantly lower than those in group A. The villus length to crypt depth of the duodenum and jejunum in group D was significantly higher than that in group A (P < 0.01). In conclusion, the following parameters can be improved by feed restriction: feed conversion ratio, diarrhea rate, abdominal fat rate, serum ALT, lipid indices and intestinal health of Minxinan black rabbits, and the EI of the farm. Feeding twice per day, 30% at 8:00 am and 70% at 4:00 pm, had the best comprehensive effects.

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Effect of feed restriction programs and slaughter age on digestive efficiency, growth performance and body composition of growing rabbits

Cited by 28 publications

References 23 publications

Effect of feed restriction and feeding plans on performance, slaughter traits and body composition of growing rabbits

Effect of feed restriction and feeding plans on performance, slaughter traits and body composition of growing rabbits

Efficacité alimentaire en cuniculture : voies d'améliorations, impacts technico-économiques et environnementaux

Effects of feeding methods on growth and slaughter performance, blood biochemical indices, and intestinal morphology in Minxinan black rabbits (Oryctolagus cuniculus)

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