Performance of Chicks Fed Diets Formulated to Minimize Excess Levels of Essential Amino Acids

Waldroup, P. W.; Mitchell, R. J.; Payne, John R.; Hazen, Kenny R.

doi:10.3382/ps.0550243

Cited by 126 publications

(47 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, our current findings showed that feeding broilers with diets containing AA higher than the requirements under hot and humid condition is unnecessary. This result is in agreement with that reported by (Waldroup et al, 1976;Leeson, 1986;Cheng et al, 1997Cheng et al, , 1999) who emphasised the importance of maintaining optimal amino acid balance under hot weather conditions. The present findings support those of Swennen et al (2006) and Hernández et al (2012) who showed that birds fed unfortified low-CP diets had lower serum UA.…”

Section: Discussionsupporting

confidence: 83%

Amino Acids Fortification of Low-protein Diet for Broilers Under Tropical Climate. 2. Nonessential Amino Acids and Increasing Essential Amino Acids

Awad

Zulkifli

Farjam

et al. 2014

Italian Journal of Animal Science

View full text Add to dashboard Cite

A three-week trial was carried out to evaluate the effect of nonessential amino acids (NEAA) supplementation to a low-crude protein (CP) diet with adequate essential amino acids (EAA) level on growth performance, blood metabolites, and relative weights of abdominal fat, breast yield, and internal organs in broiler chickens raised under tropical hot and humid environment. Five isocaloric (3000 metabolisable energy/kg) corn-soybean diets were administered (1 to 21 days) to 5 groups of broilers (60 birds/group) as follows: i) 22.2% CP (positive control; PC); ii) 16.2% CP+all EAA to meet or exceed the National Research Council (1994) recommendations (negative control; NC); iii) NC+further EAA to equal the levels in the PC diet; iv) NC+NEAA to equal the levels in the PC; v) NC+EAA and NEAA to equal the amino acids levels in the PC diet. The results showed that the fortification of EAA alone, only improved feed intake (FI), whereas, addition of NEAA or EAA+NEAA significantly enhanced body weight, daily weight gain, and FI and decreased the feed conversion ratio to the same levels as in PC. Serum uric acid was significantly reduced and serum triglyceride increased in NC group. Dietary treatments had no significant effect on relative weights of heart, liver, abdominal fat, breast meat yield, serum albumin, and serum total protein. In conclusion, these results suggest that NEAA fortification may improve the growth performance of broilers fed an excessive low-CP diet under tropical hot and humid condition.

show abstract

Section: Discussionsupporting

confidence: 83%

Amino Acids Fortification of Low-protein Diet for Broilers Under Tropical Climate. 2. Nonessential Amino Acids and Increasing Essential Amino Acids

Awad

Zulkifli

Farjam

et al. 2014

Italian Journal of Animal Science

View full text Add to dashboard Cite

show abstract

“…Não houve efeito (P>0,05) dos níveis de lisina sobre o consumo de ração das fêmeas, exceto para os machos que responderam linearmente (P<0,05). Quanto às fêmeas, estes resultados foram semelhantes aos obtidos por WALDROUP et al (1976) e COLNAGO e JENSEN (1992). Como pode ser visto na Tabela 2, os níveis de lisina influenciaram de forma quadrática o ganho de peso e a conversão alimentar das aves, independente do sexo, o que confirma os resultados obtidos por HAN e BAKER (1991,1992), CONHALATO (1998) e BARBOZA e ROSTAGNO (1998a).…”

Section: Níveis De Lisina Da Ração No Desempenho De Frangos De Corteunclassified

Níveis dietéticos de lisina para frangos de corte de 1 a 21 e 22 a 40 dias de idade

Costa

Rostagno²,

Albino³

et al. 2001

R. Bras. Zootec.

View full text Add to dashboard Cite

RESUMO -Foram realizados dois experimentos para determinar a exigência nutricional de lisina total para frangos de corte Ross de ambos os sexos, nos períodos de 1 a 21 e 22 a 40 dias de idade, respectivamente. Foram avaliados o ganho de peso, consumo de ração, conversão alimentar e avaliação de carcaça. Para cada experimento, o delineamento utilizado foi o inteiramente casualizado, em esquema fatorial 2x6, constituídos de dois sexos e seis níveis dietéticos de lisina, com seis repetições e um total de 1440 aves. As dietas basais com 1,03% de lisina total, 22,00% PB e 3000 kcal EM/kg, no primeiro experimento, e 0,92% de lisina total, 20,00% PB e 3150 kcal EM/ kg no segundo experimento, foram suplementadas com seis níveis de lisina pura (0; 0,06; 0,12; 0,18; 0,24 e 0,30%). Considerando-se os dados de ganho de peso e conversão alimentar, as exigências nutricionais estimadas para o experimento de 1 a 21 dias foram 1,303 e 1,249% de lisina total e 1,183 e 1,129% de lisina digestível, para os machos e fêmeas, respectivamente. Para o experimento de 22 a 40 dias, levando em consideração os parâmetros analisados de desempenho e avaliação de carcaça, pode-se estimar uma exigência de 1,164 e 1,143% de lisina total e 1,044 e 1,023% de lisina digestível para machos e fêmeas Ross, respectivamente.Palavras-chave: avaliação de carcaça, exigência nutricional, frangos de corte, lisina total Dietary Lysine Levels for Broilers Chickens from 1 to 21 and 22 to 40 Days of AgeABSTRACT -Two experiments were carried out to determine the nutritional requirement of total lysine for Ross broiler chickens from one to 21 and 22 to 40 days of age, of both sexes. The parameters evaluated were weight gain, feed intake, feed conversion and carcass evaluation. In each experiment, a completely randomized experimental design, in a 2 x 6 (two sexes and six dietary lysine levels) factorial arrangement with six replicates, using a total of 1440 birds, was used. The basal diets with 1.03% total lysine, 22.0% CP and 3000 kcal ME/kg in the first experiment and 0.92% total lysine, 20.0% CP and 3150 kcal ME/kg in the second experiment, suplemented with six levels pure lysine (0.0; 0.06; 0.12; 0.18; 0.24 and 0.30%), were used. Considering weigth gain and feed conversion, the dietary requirement estimates for the experiment from 1 to 21 days were 1.303 and 1.249% total lysine and 1.183 and 1.129% digestible lysine for males and females, respectively. For the experiment from 22 to 40 days, the performance and evaluation carcass values were 1.164 and 1.143% total lysine and 1.044 and 1.023% digestible lysine for males and females, respectively. Key Words: broiler chickens, carcass evaluation, nutritional requirement, total lysine 1 Parte da tese apresentada à Universidade Federal de Viçosa para a obtenção do título de "Doctor Science". 2 Professor do Departamento de Zootecnia da UFPB, Areia-PB. E.mail: fperazzo@cca.ufpb.br 3 Professor do Departamento de Zootecnia da UFV, Viçosa-MG. E.mail: rostagno@mail.ufv.br 4 Aluno do curso de Pós-Graduação da UFV, Viçosa-MG...

show abstract

“…As to dietary protein concentration, two strategies are suggested to minimize CHS effects on growth rate: a) the use of low-protein diets in order to decrease heat increment, with some authors recommending lowering dietary protein content with the supplementation of essential amino acids (Waldroup, 1976;Austic, 1985;Cheng et al, 1997); and b) the use of high-protein diets to compensate lower feed intake caused by heat, as recommended by Temim et al (2000).…”

Section: Introductionmentioning

confidence: 99%

Effects of the reduction of dietary heat increment on the performance, carcass yield, and diet digestibility of broilers submitted to heat stress

Laganá¹,

Ribeiro

Kessler

et al. 2007

Rev. Bras. Cienc. Avic.

View full text Add to dashboard Cite

This experiment aimed at verifying the effect of different diets and thermal environments on the performance, carcass yield, and diet digestibility of 21 to 42-day-old broilers. A total number of 288 21-day-old male Ross broilers were distributed in a 2 x 2 + 2 factorial arrangement, with six replicates, including the following factors: two environments (TNE - thermoneutral: 21-25ºC and 73% RH; CHS - cyclic heat stress: 25-32ºC and 65%RH), and two diets (control: 2.4% soybean oil and 19.5% protein; summer: 4.0% soybean oil and 18.5% protein). In TNE, two additional treatments were included with feed restriction of birds fed both the control and summer diets (pair-feeding), thereby maintaining the same feed intake level for both types of diet. Diet did not influence performance, dry matter and protein digestibilities, or carcass and part yields. TNE birds had better performance (p<0.001) as compared to CHS birds, but FCR was not different. CHS birds had lower breast yield (p<0.0001), and higher thigh yield (p<0.02) than TNE birds. In the pair-feeding treatments, environment did not influence performance, but dry matter digestibility was significantly lower in CHS (p<0.03), whereas protein digestibility was not affected. The difference in feed intake was the main responsible factor for the variation in the performance of heat-stressed birds

show abstract

Performance of Chicks Fed Diets Formulated to Minimize Excess Levels of Essential Amino Acids

Cited by 126 publications

References 18 publications

Amino Acids Fortification of Low-protein Diet for Broilers Under Tropical Climate. 2. Nonessential Amino Acids and Increasing Essential Amino Acids

Amino Acids Fortification of Low-protein Diet for Broilers Under Tropical Climate. 2. Nonessential Amino Acids and Increasing Essential Amino Acids

Níveis dietéticos de lisina para frangos de corte de 1 a 21 e 22 a 40 dias de idade

Effects of the reduction of dietary heat increment on the performance, carcass yield, and diet digestibility of broilers submitted to heat stress

Contact Info

Product

Resources

About