Níveis de proteína bruta e de aminoácidos sulfurados totais sobre o desempenho, a qualidade dos ovos e a excreção de nitrogênio de poedeiras de ovos marrons

Pavan, Ana Claudia Lemes; Móri, Cleusa; Garcia, Edivaldo Antônio; Scherer, Miriani Rosa; Pizzolante, Carla Cachoni

doi:10.1590/s1516-35982005000200026

Cited by 28 publications

(40 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This variable depends on feed intake and egg production, which was influenced by the different met+cys intakes (Togashi et al, 2002). In contrast to the results of this study, some authors observed no significant differences in this variable (Pavan et al, 2005). The values of feed conversion per mass were higher with lower levels of met+cys, which was most likely caused by the low protein content in this diet test (Harper et al, 1970).…”

Section: Resultscontrasting

confidence: 91%

Response of laying hens to methionine + cystine intake by dilution technique

et al. 2015

View full text Add to dashboard Cite

-The objective of this study was to measure the response of Dekalb White laying hens to different intakes of digestible methionine + cystine (met+cys) to optimise their performance. Two hundred eighty-eight Dekalb White laying hens, ranging in age from 33 to 48 weeks, were used in the study. The birds were randomly allocated into eight treatment (levels of met+cys and the control treatment) groups with six replicates of six hens per unit. The experimental diets consisted of seven increasing levels of met+cys (1.37, 2.75, 4.14, 5.51, 6.89, 7.92 and 8.95 g kg −1 ) and were prepared using a dilution technique. A control treatment was used to confirm that the limiting response was due to met+cys intake. Egg production, feed intake, egg weight, egg mass and feed conversion per mass were measured. The data were analysed with repeated measures and regression analyses using Broken Line and Quadratic models, as well as using the combination of both models. The different met+cys intakes influenced the studied variables; all the variables except feed conversion per mass were significantly different between the periods and levels. The digestible met+cys intakes based on the association of the Broken Line and Quadratic models to optimise the birds' response to egg mass are 671 mg/bird d for 33 to 36 weeks, 728 mg/bird d for 37 to 40 weeks, 743 mg/bird d for 41 to 44 weeks, and 770 mg/bird d for 45 to 48 weeks.

show abstract

Section: Resultscontrasting

confidence: 91%

Response of laying hens to methionine + cystine intake by dilution technique

et al. 2015

View full text Add to dashboard Cite

show abstract

“…However, Costa et al (2004) fed layers with different crude protein levels (15.5-17.5%) and verified a positive linear response in eggshell percentage. In a study with brown layers after the peak of lay, Pavan et al (2005) did not find any significant differences in the eggshell percentage of layers fed 14 or 17% crude protein.…”

Section: High-fiber Diets With Reduced Crude Protein For Commercial Lmentioning

confidence: 77%

High-fiber diets with reduced crude protein for commercial layers

Praes

Junqueira

Pereira

et al. 2014

Rev. Bras. Cienc. Avic.

View full text Add to dashboard Cite

KeywordsRice hulls, cottonseed hulls, soybean hulls, crude protein, egg production. ABSTRACTThis study aimed at evaluating diets containing different fiber sources and two crude protein levels on the performance, egg quality, and nitrogen metabolism of commercial layers. In total, 392 48-wk-old Isa Brown layers were distributed according to a completely randomized experimental design in a 3x2+1 (control) factorial arrangement, resulting in seven treatments with seven replicates of eight birds each. Treatments consisted of three fiber feedstuffs (cottonseed hulls, soybean hulls, and rice hulls) and two dietary crude protein levels (12% and 16%). Cottonseed hulls associated with the high crude protein level (16%) resulted in the worst feed conversion ratio per dozen eggs. Diets with 16% crude protein resulted in the highest feed intake, egg production, egg weight, egg mass values, and improved feed conversion ratio (kg eggs/kg feed). The dietary inclusion of soybean hulls determined low yolk pigmentation, and of rice hulls, low egg specific gravity. The 16% crude protein diet with rice hulls promoted the best feed conversion ratio. Hens fed the reference diet presented higher egg mass and better feed conversion ratio per kg eggs and per dozen eggs. Hens fed the diets with low crude protein level (12%) had reduced nitrogen excretion, but presented worse egg production.

show abstract

“…The treatments with 15.5% CP (T2) and 14% CP (T3) showed the lowest results for uric acid, but not different from each other and from the treatments with 15.17% CP + 0.341% L-glutamic acid (T4). Pavan et al (2005) evaluated protein reduction (17, 15.5 and 14% CP) in brown-egg hens and observed that the ingestion of diets with 14% CP, reduced nitrogen excretion by 27% as compared with diets with 17% CP. In the same way, Ishibashi and Yonemochi (2003) studied amino acid requirement and protein reduction on egg production and nitrogen excretion and observed an evident drop in nitrogen excreted when dietary protein was reduced.…”

Section: Resultsmentioning

confidence: 99%

<b>Glutamic acid supplementation on low protein diets for laying hens

Bezerra

Costa

Givisiez

et al. 2015

Acta Sci. Anim. Sci.

View full text Add to dashboard Cite

ABSTRACT. With the objective of evaluating the effect of reducing crude protein (CP) and L-glutamic acid supplementation, Dekalb Brown laying hens with 34 weeks of age. The birds were distributed in six treatments in a completely randomized design, eight replications of eight birds. The control diet contained 17% CP. The second and third treatments had CP reduced by 1.5 and 3.0 percentage points (pp) of CP in relation to the control diet, respectively. In the fourth treatment, was added the same amount of glutamate of the control diet (2.982%), and the last two treatments was added 1 and 2 pp of glutamate in relation to control diet (3.982 and 4.98%), respectively. The treatment with 15.17% CP + 0.341% L-glutamic acid (T4) promoted higher egg production, and the control diet showed greater egg weight than others treatments. There was no significant effect on the variables on quality of eggs. The T4 presented values of excreted nitrogen similar to the others treatments, with lower concentration of uric acid than the control diet and lower cost in the production. In conclusion, it is recommended the treatment with 15.17% CP + 0.341% L-glutamic acid for Brown laying hens with 34 weeks of age.Keywords: egg production, nitrogen, performance, uric acid.Ácido glutâmico suplementado em dietas de baixa proteína para poedeiras semipesadas RESUMO. Com o objetivo de avaliar o efeito da redução da proteína bruta (PB) e suplementação de L-glutamato em poedeiras da linhagem Dekalb Brown com 34 semanas de idade, as aves foram distribuídas em seis tratamentos em um delineamento experimental inteiramente casualizado com oito repetições. A dieta controle continha 17% PB. Os segundo e terceiro tratamentos tinham redução de 1,5 e 3,0 pontos percentuais (pp) de PB em relação à dieta controle, respectivamente. No quarto tratamento, foi adicionada a mesma quantidade de glutamato da dieta controle (2,982%), e nos dois últimos tratamentos foram adicionados 1 e 2 pp de glutamato em relação à dieta controle (3,982 e 4,98%), respectivamente. O tratamento com 15,17% CP + 0,341% L-glutâmico (T4) promoveu maior produção de ovos, e a ração controle apresentou maior peso de ovos do que os outros tratamentos. Não houve efeito significativo sobre as variáveis relativas à qualidade dos ovos. O T4 apresentou valores de nitrogênio excretado semelhante aos demais tratamentos, com menor concentração de ácido úrico que a dieta controle e menor custo na produção. Em conclusão, recomenda-se o tratamento com 15,17% PB + 0,341% de ácido L-glutâmico para poedeiras semipesadas com 34 semanas de idade.Palavras-chave: produção de ovos, nitrogênio, desempenho, ácido úrico.

show abstract

Níveis de proteína bruta e de aminoácidos sulfurados totais sobre o desempenho, a qualidade dos ovos e a excreção de nitrogênio de poedeiras de ovos marrons

Cited by 28 publications

References 9 publications

Response of laying hens to methionine + cystine intake by dilution technique

Response of laying hens to methionine + cystine intake by dilution technique

High-fiber diets with reduced crude protein for commercial layers

<b>Glutamic acid supplementation on low protein diets for laying hens

Contact Info

Product

Resources

About