Individual response of growing pigs to lysine intake

Heger, J.; Křížová, Ludmila; Šustala, M.; Nitrayová, S.; Patráš, P.; Hampel, David

doi:10.1111/j.1439-0396.2008.00837.x

Cited by 9 publications

(4 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The 5.2% coefficient of variation is consistent with the findings of published studies about the response of growing pigs to amino acid intake (Heger et al, 2007;Heger et al, 2008;Heger et al, 2009). This indicates that the maximum protein deposition rate also varies considerably among individuals, even when animals present homogenous characteristics (genetic strain, age, and sex) and are evaluated under the same environmental and health-challenged conditions.…”

Section: Discussionsupporting

confidence: 86%

Individual responses of growing pigs to threonine intake

et al. 2018

View full text Add to dashboard Cite

A nitrogen balance test was performed to evaluate the individual responses of growing pigs to threonine intake. Eight commercial barrows were used (body weight ranging from 15 to 20 kg). A dose-response study was performed, in which the threonine supply increased in seven equidistant steps (the seven dietary threonine levels ranged from 50 to 120% of the requirements) every three days for each pig. The levels of all other amino acids were 20% higher than the tested amino acid. Nitrogen retention as a function of threonine intake was calculated per individual and per group (NLIN and NLMixed, respectively) using a linear plateau model. The highest break point value was 42.42 g of threonine intake (the most demanding individual), whereas the lowest value was 34.16 g (the least demanding individual), corresponding to a difference of 19%. In terms of N retention, the highest plateau value was 66.71 g and the lowest was 49.48 g, with a difference of 25%. There was no significant correlation between slope and plateau values or between slope and break point values. When using the model in which all parameters were random effects, the variations in threonine intake and nitrogen retention were 1.68±1.30 and 0.01±0.10 g, respectively, and no variance in the slope of the curve was detected. The average daily threonine intake values for the maximum response obtained in the group, as calculated by the NLIN and NLMixed procedures, were 13.96 and 14.02 g/day, respectively. The threonine intake for the maximum N retention between individuals ranged from 34.16 to 42.42 g, corresponding to a difference of 19%. The current recommended intake to optimize N retention is 14.02 g/day. The group responses obtained by the NLMixed procedures are very similar to those estimated by the NLIN procedure (all individuals).

show abstract

Section: Discussionsupporting

confidence: 86%

Individual responses of growing pigs to threonine intake

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Pour l'obtention de valeurs individuelles de besoin, Heger et al (2007Heger et al ( , 2008Heger et al ( , 2009 ont utilisé une méthode de bilans azotés consécutifs de 24 heures chacun, en réponse à de petites augmentations de l'acide aminé limitant dans le régime. Après 4 jours d'adaptation au régime le plus carencé, chaque animal étudié reçoit consécutivement sur 15 jours, 15 niveaux d'apport de l'acide aminé étudié augmentant graduellement de 50 à 140% du besoin estimé.…”

Section: / Détermination Expérimentale De La Variabilité Des Besoins unclassified

“…L'ajustement d'un modèle quadratique plateau ou linéaire-plateau à la réponse de chaque individu permet d'obtenir le besoin en l'acide aminé étudié pour chaque porc et sa variabilité entre les animaux étudiés. Ces auteurs évaluent ainsi expérimentalement sur neuf femelles croisées Large White x (Large White x Landrace) le Coefficient de Variation (CV) du besoin en acide aminé (en valeur digestible standardisée) à 3% à 45 kg de Poids Vif (PV) pour la thréonine (Heger et al 2007), à 11% à 50 kg de PV pour la méthionine (Heger et al 2008) et à 10% à 47 kg de PV pour la lysine (Heger et al 2009).…”

Section: / Détermination Expérimentale De La Variabilité Des Besoins unclassified

Prise en compte de la variabilité individuelle dans la modélisation de la réponse des porcs en croissance aux apports alimentaires

et al. 2012

View full text Add to dashboard Cite

Chez le porc en croissance, la connaissance des besoins nutritionnels, notamment en acides aminés, est nécessaire pour formuler des aliments permettant d'optimiser l’efficacité alimentaire et potentiellement de réduire l’impact environnemental de cette production. Cependant, tous les animaux ne présentent pas les mêmes besoins et donc pas les mêmes réponses à des apports équivalents, ce qui résulte de la variabilité du potentiel des animaux au sein d'un groupe. Cet article présente les outils disponibles pour évaluer la variabilité individuelle des besoins en acides aminés chez le porc en croissance. Nous montrons ensuite comment il est possible d'intégrer cette variabilité aux outils de modélisation afin d'optimiser les stratégies d'alimentation. Si les techniques expérimentales actuelles permettent une détermination individuelle des besoins, la représentativité des résultats obtenus sur la variabilité des besoins est limitée par le nombre restreint d’animaux étudiés. Tout en nécessitant un nombre important de données, l’intégration de la variabilité individuelle dans les modèles mathématiques de croissance du porc offre la possibilité d’analyser la variabilité des besoins de façon dynamique et sur des populations plus grandes. En utilisant ces modèles pour simuler des populations d’animaux et non plus un individu unique, des stratégies alimentaires adaptées aux populations considérées peuvent être définies pour optimiser leurs résultats zootechniques et économiques tout en minimisant l’impact environnemental. L’apport de la modélisation et la prise en compte de la variabilité individuelle amènent également à envisager le développement de nouvelles pratiques telles que l’alimentation de précision.

show abstract

“…Other studies have demonstrated the lack of difference between pigs fed below the requirement with l-Lys·HCl or soybean meal (SBM)-bound Lys for PD (Susenbeth et al 1994;Liebert, 1995;Colina et al, 2013). Moreover, Heger et al (2009) indicated that pigs with a greater PD rate do not utilize Lys more efficiently compared to pigs with less PD.…”

mentioning

confidence: 99%

Body composition, tissue deposition, and lysine utilization for protein deposition of barrows and gilts fed crystalline or protein-bound lysine1

Colina

Miller

Lewis

et al. 2016

Journal of Animal Science

View full text Add to dashboard Cite

An experiment with 2 trials (28 d/trial) was conducted to determine body composition, tissue deposition, and utilization of Lys for protein deposition (PD) of barrows and gilts fed -Lys·HCl (CLys) or protein-bound Lys in soybean meal (SBM). Thirty-two growing pigs (16 barrows and 16 gilts; average initial BW of 18.6 kg) were used in each of 2 trials. Four pigs (2 barrows and 2 gilts) were euthanized at the start of each trial to determine initial body composition. The remaining pigs were euthanized at the end of the trials to determine empty-body composition and deposition rates of water, protein, fat, ash, and AA. Pigs were randomly allotted to 1 of 7 dietary treatments. There were 2 replications per treatment in each trial for a total of 4 replications. Dietary treatments consisted of a corn-SBM basal diet (0.48% Lys) and diets containing 0.56%, 0.65%, and 0.74% standardized ileal digestible (SID) Lys that were achieved by adding Lys to the basal diet from either SBM or CLys. Pigs fed the CLys-supplemented diets at 0.65% SID Lys had more ( < 0.05) body water (663 vs. 624 g/kg) and less ( < 0.01) body protein (153 vs. 160 g/kg) than pigs fed the SBM-supplemented diets. Body fat content decreased ( < 0.01) as the dietary Lys increased similarly for pigs fed Lys from SBM and pigs fed CLys. Gilts had greater ( = 0.05) body Lys content in body protein than barrows (7.68 vs. 7.52 g/100 g). Empty-body ash contents were not different between pigs fed CLys or SBM-supplemented diets. Water deposition and PD increased linearly ( < 0.01) with dietary Lys and were least ( < 0.01) in pigs fed the basal diet but were similar when comparing pigs fed CLys and SBM-supplemented diets at the same dietary Lys concentration. Lysine deposition showed a linear increase ( < 0.01) with dietary Lys but was not different between pigs fed the 2 Lys sources at the same concentration. Barrows and gilts did not differ in tissue deposition rates. Overall, empty-body contents and deposition rates of essential and nonessential AA were not different between pigs fed CLys and pigs fed SBM-bound Lys. The amount of SID Lys required for PD ranged between 0.09 and 0.13 g/g for both sources of Lys. The Lys deposition:SID Lys intake ratio was greater ( < 0.01) in gilts than barrows (0.62 vs. 0.56). Body composition, tissue deposition, and utilization of Lys for PD and Lys deposition were not different in pigs fed diets supplemented with -Lys·HCl with respect to protein-bound Lys in SBM.

show abstract

Individual response of growing pigs to lysine intake

Cited by 9 publications

References 25 publications

Individual responses of growing pigs to threonine intake

Individual responses of growing pigs to threonine intake

Prise en compte de la variabilité individuelle dans la modélisation de la réponse des porcs en croissance aux apports alimentaires

Body composition, tissue deposition, and lysine utilization for protein deposition of barrows and gilts fed crystalline or protein-bound lysine1

Contact Info

Product

Resources

About