Threonine Supplementation of Practical Diets for 3- to 60 Wk-Old Broilers

Penz, Antônio Mário; Colnago, G. L.; Jensen, L. S.

doi:10.1093/japr/6.4.355

Cited by 17 publications

(3 citation statements)

References 7 publications

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“…In addition, Kidd and Kerr (1997) fed graduations of Thr to Ross )Ross 308 male broilers in a cornÁpeanut meal-based diet and determined that the live performance needs during 30 to 42 d are satisfied with 0.70% total Thr. These live performance needs for Thr (Kidd & Kerr 1997) are in agreement with the former estimates (Webel et al 1996;Penz et al 1997), since they were obtained in the last half of the 21-to 42-d period. Similar to the result of the current study, Kidd and Kerr (1997) evaluated carcass traits and found that a higher level of Thr (0.78% total of diet) was needed to yield good breast meat accretion.…”

Section: Journal Of Applied Animal Research 479supporting

confidence: 89%

“…Dietary Thr needs observed for live performance measurements are in agreement with those previously published for birds during the same age period (Webel et al 1996;Penz et al 1997;Mack et al 1999). Webel et al (1996) fed graduations of Thr to Ross )Hubbard broilers from d 21 to 42 in a cornÁpeanut meal-based diet and reported that optimal feed conversion occurred when dietary Thr was 0.70%.…”

Section: Journal Of Applied Animal Research 479supporting

confidence: 88%

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Estimation of dietary threonine requirement for growth and immune responses of broilers

Taghinejad-Roudbaneh

Babaee

Afrooziyeh

et al. 2013

Journal of Applied Animal Research

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This study was conducted to determine the effects of supplementing threonine (Thr) at different levels in the diets on growth performance and immune responses of broiler chickens challenged with infectious bursal disease (IBD) and also to estimate Thr requirement based on different response criterion. A total of 300 one-day-old male broiler chicks were assigned to one of the six dietary treatments. Chickens were fed eight graded levels of Thr: 0.60, 0.67, 0.74, 0.81, 0.88 or 0.95% from day 21 to 42 of age. On day 28, all birds were challenged with a commercial live-IBDV vaccine. Body weight gain (BWG), feed conversion ratio (FCR) and carcass characterisation (breast, thigh and fat pad percentage) were significantly influenced by Thr levels. Increasing advisable level up to 0.81% of the diet resulted in significant improvement in the FCR and BWG. Thr supplementation had great effects on the antibody titer against IBD; the broilers receiving the Thr levels of higher than National Research Council (NRC) recommendation have a higher IBD antibody titer than those that received lower levels of Thr. The highest (0.822490.0211) and the lowest (0.724090.0140) were estimated with straight broken-line analysis for immune response (14 days post-challenge) and breast weight, respectively. The results obtained in the present study indicated that Thr requirements of broiler based on the recommendation of NRC are not sufficient to meet the requirement of the new commercial broiler companies under stress and non-hygienic conditions. The best level of Thr based on the current study was 0.81% for support growth performance and immune function.

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Section: Journal Of Applied Animal Research 479supporting

confidence: 89%

Section: Journal Of Applied Animal Research 479supporting

confidence: 88%

Estimation of dietary threonine requirement for growth and immune responses of broilers

Taghinejad-Roudbaneh

Babaee

Afrooziyeh

et al. 2013

Journal of Applied Animal Research

View full text Add to dashboard Cite

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“…Our result is an agreement with Penz et al (1991), who recommended 0.68% Thr for optimal feed efficiency from 21-42 days of age. Also, Penz et al (1997) concluded that the total Thr requirement was no greater than 0.70% of diet. In addition, Li (2000) reported that the requirement of the total Thr was 0.66% from 3-6 weeks of age.…”

Section: Resultsmentioning

confidence: 99%

Effects of Dietary Threonine Levels and Stocking Density on the Performance, Metabolic Status and Immunity of Broiler Chickens

Azzam¹,

El-Gogary²

2015

Asian J. of Animal and Veterinary Advances

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A total of 240 Cobb 500 broiler chicks, 18 days old, were allocated to 10 treatments groups, each of which included 4 replicates. Experimental treatments consisted of a 5×2 factorial arrangement with 5 levels of L-threonine (Thr) supplementation and 2 levels of stocking density (11.90 birds mG 2 as the normal stocking density or 16.66 birds mG 2 as the high stocking density). L-Thr was added to a basal diet at 0.0 (control group), 0.25, 0.50, 0.75 and 1.00 g kgG 1 diet. Dietary Thr values were 0.69, 0.71 (deficient), 0.74 (adequate; 100% NRC), 0.76 and 0. 79% (excess) of the current NRC recommendations. At 42 days of age, dietary Thr levels had no significant effect on performance, immunity, plasma total protein and glucose (GLU). However, plasma cholesterol (CHO) levels decreased significantly (p<0.05) with L-Thr supplementation and the lowest value occurred at 0.74% total dietary Thr. In addition, plasma triiodothyronine (T3) and thyroxine (T4) levels were higher (p<0.05) at 0.76% total dietary Thr compared with the control group. The normal stocking density resulted in better performance (p<0.05) compared with the high stocking density. However, stocking density did not affect plasma total protein, total Ig, IgG, IgM, total lipids, GLU, CHO, T3 and T4 levels. Interactions between Thr level and stocking density were observed for plasma levels of total lipids and cholesterol. In conclusion, total dietary Thr level at 0.69% (93% of NRC recommendations) is sufficient to improve broiler performance or immunity under high stocking density. However, 0.74% total dietary Thr level has a positive effect on decreasing plasma total lipids and cholesterol levels during growing-finishing phase.

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Influence of sex and rearing method on performance and flock uniformity in broilers—implications for research settings

England¹,

Gharib-Naseri²,

Kheravii³

et al. 2023

Animal Nutrition

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Threonine Supplementation of Practical Diets for 3- to 60 Wk-Old Broilers

Cited by 17 publications

References 7 publications

Estimation of dietary threonine requirement for growth and immune responses of broilers

Estimation of dietary threonine requirement for growth and immune responses of broilers

Effects of Dietary Threonine Levels and Stocking Density on the Performance, Metabolic Status and Immunity of Broiler Chickens

Influence of sex and rearing method on performance and flock uniformity in broilers—implications for research settings

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