Fontes e níveis de metionina em dietas para frangos de corte

Viana, Maurício Tárcio dos Santos; Albino, Fernando Teixeira; Rostagno, Horácio Santiago; Barreto, Sergio Luiz de Toledo; Carvalho, Débora Cristine de Oliveira; Gomes, Paulo Cézar

doi:10.1590/s1516-35982009000900016

Cited by 4 publications

(5 citation statements)

References 6 publications

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“…This result shows that there was 15.29 and 9.73% improvement in gain and 8.43 and 6.27% in feed conversion, respectively, for both DLM-65 and DL-HMB. These results differed from those previously reported by Payne et al (2006) and Viana et al (2009), who observed similar performance responses in birds that were supplemented with increasing levels of DL-HMB or DLM in an amount equivalent to 65% according to the amount of each level of DL-HMB.…”

Section: Resultscontrasting

confidence: 99%

Bioavailability of different methionine sources for broilers from 1 to 21 days old

et al. 2015

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. 2015. Bioavailability of different methionine sources for broilers from 1 to 21 days old. Cien. Inv. Agr. 42(1): 35-43. This trial aimed to evaluate the bioavailability of DL-2-hydroxy-4-(methyl) butanoic acid (DL-HMBA) and a poly-herbal ingredient (PHI) in relation to DL-methionine (DLM) on broilers. A sample of 1100 broiler chickens of the Cobb 500 strain, both male and female, were fed either a basal diet without industrial methionine supplementation or a basal diet that was supplemented with three DL-HMBA levels (0.170, 0.340, and 0.511%) or three DLM levels (0.111, 0.221, and 0.332%) in an amount equivalent to 65% of the respective DL-HMBA levels (on a product weight basis) and three levels of PHI (0.111, 0.221, and 0.332%) in amounts equivalent to the used DLM levels from 1 to 21 days of age. The simultaneous linear regression analysis (slope ratio) revealed a relative bioavailability of DL-HMBA of 39% compared to that of DLM for weight gain and 44% for feed conversion. However, the performance data from birds that were supplemented with PHI did not significantly adjust to simultaneous regression designs; therefore, it was not possible to determine the PHI bioavailability in relation to the DLM. Considering together all of the studied parameters, the relative bioavailability of DL-HMBA was 42% compared to the DLM on a product basis.

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Section: Resultscontrasting

confidence: 99%

Bioavailability of different methionine sources for broilers from 1 to 21 days old

et al. 2015

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“…Other studies, including Buresh and Harms (1986), Schutte and Weerden (1987) and Costa and Bastiani (1997), also found no significant differences in feed intake when comparing two methionine sources (DLM-99% and HMTBA-88%). Meanwhile, Viana et al (2009) studied two dietary methionine sources (DLM-99% and HMTBA-88%) observed no significant difference in feed intake.…”

Section: Resultsmentioning

confidence: 93%

“…() and Viana et al. () observed equivalence between supplemental methionine sources and the DLM‐99% (standard) source when studying supplemental methionine sources in the diet of broilers.…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, Viana et al. () studied two dietary methionine sources (DLM‐99% and HMTBA‐88%) observed no significant difference in feed intake.…”

Section: Resultsmentioning

confidence: 99%

“…,Bunchasak and Keawarun (2006),Elwert, Fernandes, and Lemme (2008),Leite et al (2009) andViana et al (2009) observed equivalence between supplemental methionine sources and the DLM-99% (standard) source when studying supplemental methionine sources in the diet of broilers.In another study,Rombola et al (2008) studied white-and brownegg replacement pullets and found that DLM-99% and HMTBA-88% led to similar performance in both lines. Regarding studies on laying hens,Carvalho et al (2009) evaluated the availability upon supplementation with HMTBA-88% and calculated values of 74.66, 73.97 …”

mentioning

confidence: 90%

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2‐Hydroxy‐4‐methylthio butanoic acid and DL‐methionine for Japanese quails in production

Vieira

Costa

Lima

et al. 2017

Animal Physiology Nutrition

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An experiment was performed using 1,000 laying Japanese quails to assess the availability of two alternative dietary methionine sources. Treatment 01 = Basal Feed that is deficient in digestible methionine + cystine (Met + Cys). The other treatments were constituted by Met + Cys levels of 0.8, 1.60 and 2.40 g/kg, supplemented with DL-Methionine-99%, HMTBA-88% and HMTBA-84%, being 10 treatments in total. The following characteristics were studied: feed intake (g/bird/day), egg production (egg/day × 100), egg weight (g/egg), egg mass (g/egg), feed conversion per egg dozen (kg feed/dozen eggs), feed conversion per egg mass (kg feed/kg eggs), relative yolk weight (g/100 g of egg), relative albumen weight (g/100 g of egg), relative shell weight (g/100 g of egg), shell thickness (mm) and specific gravity (g/cm ). In general result comment, supplemental methionine sources must be included in the poultry diet. The different methionine sources affect the performance of quails, and the increase in the levels within each source improves the performance variables. Significant effect was observable on performance variables and egg quality variables, being that DLM-99% is superior to the other sources. The HMTBA-88% source is superior to the HMTBA-84% source for the same aforementioned variables. In conclusion, the bioefficacy values of the HMTBA-88% and HMTBA-84% sources compared to the DLM-99% source on an equimolar basis were 81 and 79%, respectively, for the performance variables, and 83 and 74 while the methionine sources were equivalent for the variables related to egg quality.

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Letter to the editor

Lemme¹

2020

World's Poultry Science Journal

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Fontes e níveis de metionina em dietas para frangos de corte

Cited by 4 publications

References 6 publications

Bioavailability of different methionine sources for broilers from 1 to 21 days old

Bioavailability of different methionine sources for broilers from 1 to 21 days old

2‐Hydroxy‐4‐methylthio butanoic acid and DL‐methionine for Japanese quails in production

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