Influence of threonine intake on whole-body protein deposition and threonine utilization in growing pigs fed purified diets.

Lange, C. F. M. de; Gillis, Aubrey; Simpson, Gregory J.G.

doi:10.2527/2001.79123087x

Cited by 43 publications

(34 citation statements)

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“…In the basal nutrient mix, the ratio of essential amino acids and total N to lysine was similar to that used previously by de Lange et al (2001), with the exception of MET and CYS. The basal nutrient mix was divided into five equal parts and varying amounts of MET and CYS.HCl were added to these parts to produce the five different "nutrient mixes" (Table 2).…”

Section: Experimental Diets and Feedingsupporting

confidence: 50%

“…The plateau in PD in this study occurred at a daily intake of approximately 5.4 g of available TSAA, or about 40 mmol d -1 of the two amino acids. Higher levels of PD (> 135 g d -1 ) were achieved by de Lange et al (2001) and de Lange et al (unpublished data) in a N-balance study using gilts of the same genotype and at a similar weight; however, in those studies the available TSAA intake was higher than in the current study. This allowed the gilts to better express their performance potential.…”

Section: Body Protein Depositioncontrasting

confidence: 48%

“…The amount of energy mix was adjusted with BW to ensure that energy intake exceeded 2.8 × maintenance energy requirements so that energy intake did not limit PD (Möhn and de Lange 1998;de Lange et al 2001). Feed wastage was collected daily on another tray and weighed for individual pigs at the completion of each N-balance period.…”

Section: Experimental Diets and Feedingmentioning

confidence: 99%

“…Given the large number of N balances that were conducted for each individual pig the risk of developing urinary infections was deemed too high when using urinary catheters. Rather, urine from each gilt was collected directly via a urine collection tray that then drained into collection containers, which contained 12 mL sulfuric acid added daily to avoid N losses by volatilization of ammonia (de Lange et al 2001).…”

Section: Experimental Designmentioning

confidence: 99%

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Influence of dietary methionine to methionine plus cysteine ratios on nitrogen retention in gilts fed purified diets between 40 and 80 kg live body weight

Gillis¹,

Reijmers²,

Pluske³

et al. 2007

Can. J. Anim. Sci.

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. 2007. Influence of dietary methionine to methionine plus cysteine ratios on nitrogen retention in gilts fed purified diets between 40 and 80 kg live body weight. Can. J. Anim. Sci. 87: [87][88][89][90][91][92]. The relationship between the ratio of available methionine (MET) to methionine plus cysteine (TSAA) intake and wholebody protein deposition (PD) was established using the nitrogen (N) balance technique in gilts between 40 and 80 kg live body weight (BW), according to a repeated 5 × 5 Latin square design. Pigs were fed casein-and cornstarch-based diets that supplied equal moles of TSAA supporting a PD of approximately 80% of the gilts' PD potential. On a weight basis, the target ratios of MET to TSAA were 42, 47, 52, 57 and 67% for the five experimental diets, respectively. This calculated to 37, 42, 47, 52 and 62.5% on a molar basis. Total N excretion (urine plus feces) was reduced (linear; P < 0.001) and PD was increased (linear; P < 0.001) when the available MET to TSAA ratio was increased to 52%; these values did not change (P > 0.05) when the MET to TSAA ratio was further increased. A number of statistical models were fitted to the data to establish the best fit of the model parameters. The greatest proportion of the variation (R 2 = 0.990) was explained with an asymptotic model; based on this model the optimum available MET to TSAA ratio (supporting 90% of the asymptotic value for PD) was 55% on a weight basis or 50.5% on a molar basis. The results indicate that the minimum contribution of available MET to TSAA requirements of growing pigs is higher than the value currently suggested by the National Research Council (46 to 48% on a weight basis). Les sujets ont reçu des rations à base de caséine ou de fécule de maïs qui fournissaient une quantité molaire identique de TSAA conduisant à un PD égal à environ 80 % du PD potentiel des animaux. Exprimé en fonction du poids, le ratio visé entre la MET et la TSAA s'établissait respectivement à 42, 47, 52, 57 et 67 % pour les cinq expériences, soit 37, 42, 47, 52 et 62,5 % en valeur molaire. Les auteurs ont observé une baisse de l'excrétion totale de N (urine et fèces) (linéaire; P < 0,001) et une hausse du PD (linéaire également; P < 0,001) quand le ratio entre la MET disponible et la TSAA passe à 52 %; ces valeurs restent identiques (P > 0,05) quand le ratio entre la MET et la TSAA continue de s'accroître. Les auteurs ont appliqué les données à plusieurs modèles statistiques en vue d'établir celui qui accepterait le mieux les paramètres. Un modèle asymptotique explique la majeure partie de la variation (R 2 = 0,990); selon ce modèle, le ratio optimal entre la MET et la TSAA (à savoir celui qui explique 90 % de la valeur asymptotique du PD) est de 55 % en poids ou de 50,5 % en valeur molaire. Les résultats indiquent que la contribution minimale de la MET aux besoins de TSAA des porcs en croissance est supérieure à ce que suggère actuellement le National Research Council (46 à 48 % selon le poids).

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Section: Experimental Diets and Feedingsupporting

confidence: 50%

Section: Body Protein Depositioncontrasting

confidence: 48%

Section: Experimental Diets and Feedingmentioning

confidence: 99%

Section: Experimental Designmentioning

confidence: 99%

See 2 more Smart Citations

Influence of dietary methionine to methionine plus cysteine ratios on nitrogen retention in gilts fed purified diets between 40 and 80 kg live body weight

Gillis¹,

Reijmers²,

Pluske³

et al. 2007

Can. J. Anim. Sci.

View full text Add to dashboard Cite

show abstract

“…The experiments by de Lange et al (2001) also suggest that the efficiency of threonine utilization is not constant within the whole range of suboptimal threonine intake. Using a serial slaughter technique, de Lange et al (2001) found that the efficiency of threonine utilization above maintenance increased significantly as threonine intake decreased from 70 to 60% of requirement. The efficiency values calculated from N balance data showed a linear increase as threonine intake decreased from 100 to 60% of requirement.…”

Section: Discussionmentioning

confidence: 99%

Assessment of statistical models describing individual and group response of pigs to threonine intake

Heger¹,

Křížová²,

Šustala³

et al. 2007

J. Anim. Feed Sci.

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A nitrogen balance experiment was conducted to study the individual and group response of growing pigs to threonine (Thr) intake. A series of fifteen purified diets with increasing concentration of Thr was fed sequentially to nine pigs during a 15-d experimental period. The concentration of Thr ranged from 50 to 140% of its assumed requirement while other essential amino acids were given in a 25 % excess. N retention was related to Thr intake using rectilinear and curvilinear models. The quadratic-plateau model fitted the individual data significantly better (P=0.02) than the linear-plateau model. The R 2 statistic indicated that the group response of pigs to Thr intake was better described by the linear-plateau and quadratic-plateau models than by exponential, saturation kinetics or four-parameter logistic models. Significant differences (P=0.004) were found between individual plateau values in the linear-plateau model while the slopes of the regression lines did not differ. No significant correlation was found between the slope and plateau or breakpoint values of the linear-plateau model. Marginal efficiency of Thr utilization derived from the linear-plateau model was 0.67. In the quadratic-plateau model, marginal efficiency of Thr utilization was dependent on Thr intake and ranged from 0.77 (50% of requirement) to 0.42 (100% of requirement). Based on linear-plateau and quadratic-plateau models, daily requirement of Thr for a 45 kg pig was calculated to be 11.5 and 12.1 g, respectively.

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Pig Breeding for Increased Sustainability

Knap

2022

Encyclopedia of Sustainability Science and Technology Series

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Influence of threonine intake on whole-body protein deposition and threonine utilization in growing pigs fed purified diets.

Cited by 43 publications

References 0 publications

Influence of dietary methionine to methionine plus cysteine ratios on nitrogen retention in gilts fed purified diets between 40 and 80 kg live body weight

Influence of dietary methionine to methionine plus cysteine ratios on nitrogen retention in gilts fed purified diets between 40 and 80 kg live body weight

Assessment of statistical models describing individual and group response of pigs to threonine intake

Pig Breeding for Increased Sustainability

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