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Carneiro ALM, Café MB, Carvalho FBD, Oliveira HFD, Carvalho DP, Carvalho GBD, Gomides LPS, Stringhini JH. Effects of a monocomponent protease from Bacillus licheniformis on broiler performance, digestibility, and carcass yield. ACTA SCIENTIARUM: ANIMAL SCIENCES 2022. [DOI: 10.4025/actascianimsci.v45i1.58499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
Two experiments were carried out to evaluate the effects of protease addition to the diet of broilers at a higher level (1× or 2×) than the nutritional value proposed for the enzyme. The first experiment, 1280 day-old chicks (Cobb500®) were randomly allocated (randomized block design, 2×2+1 factorial arrangement), five treatments, eight replicates containing 32 birds/replicate. Treatments consisted: control diet without protease (CD); CD + 1× nutritional value of the enzyme (CDM1); CD + 2× nutritional value of the enzyme (CDM2); CDM1 + protease; and CDM2 + protease. The experimental period was 42 days. The mean weight (AFW), feed intake (FI), weight gain (WG), feed conversion, and carcass yield were evaluated. Significant differences were observed for AFW, WG, FI, abdominal fat yield, and feet percentage in the carcass. In the second experiment, 120 Cobb500® chicks at 14 days of age were allotted in a completely randomized design, 2×2+1 factorial arrangement, five treatments, six replicates with four birds/replicate. The treatments were consistent with the first experiment. Significant improvements in the nitrogen balance were observed for the broilers that received protease. The use of the enzyme tested is recommended with the recommended nutritional matrix, improving the zootechnical indices of broilers.
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Soares KR, Lara LJC, Martins NRDS, Silva RRE, Pereira LFP, Cardeal PC, Teixeira MDPF. Protein diets for growing broilers created under a thermoneutral environment or heat stress. Anim Feed Sci Technol 2020. [DOI: 10.1016/j.anifeedsci.2019.114332] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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PASTORE SM, ALBINO LFT, GOMES PC, OLIVEIRA WPD, SILVA EAD, VIANA GDS, MENDES MFDSA, ALVES WJ, IGLESIAS E. Relação treonina: lisina digestíveis na dieta de poedeiras leves de 42 a 58 semanas de idade. REVISTA BRASILEIRA DE SAÚDE E PRODUÇÃO ANIMAL 2016. [DOI: 10.1590/s1519-99402016000300010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
RESUMO Este estudo foi realizado para determinar a relação ideal de treonina:lisina digestíveis para poedeiras leves no período de 42 a 58 semanas de idade. Foram utilizadas 240 poedeiras Hy Line W-36 com 42 semanas de idade durante 16 semanas. Os tratamentos foram distribuídos em delineamento inteiramente casualizado, com oito repetições e seis aves por unidade experimental. As dietas experimentais foram formuladas com cinco níveis de treonina digestível (0,461; 0,515; 0,569; 0,622 e 0,676%) proporcionando as cinco relações treonina:lisina digestíveis (60; 67; 74; 81 e 88%) estudadas. As variáveis analisadas foram: produção de ovos; consumo de ração, de lisina e de treonina; massa e peso médio dos ovos; eficiências de utilização da lisina por massa e ovos produzidos; conversões alimentares por massa e dúzia de ovos; pesos médios de: gema, albúmen e de casca; ganho de peso; peso corporal final das aves; e balanço de nitrogênio. As relações treonina:lisina digestíveis na dieta não influenciaram as variáveis analisadas, exceto o consumo de treonina que apresentou efeito linear. A relação ideal de treonina:lisina digestíveis na dieta para galinhas poedeiras leves de 42 a 58 semanas de idade é de 60%, que corresponde ao nível de 0,461% de treonina digestível na dieta e ao consumo diário de treonina digestível de 446mg/ave.
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Bezerra RM, Costa FGP, Givisiez PEN, Freitas ER, Goulart CC, Santos RA, Souza JG, Brandão PA, Lima MR, Melo ML, Rodrigues VP, Nogueira ET, Vieira DVG. Effect of l-glutamic acid supplementation on performance and nitrogen balance of broilers fed low protein diets. J Anim Physiol Anim Nutr (Berl) 2015; 100:590-600. [PMID: 26614118 DOI: 10.1111/jpn.12405] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 08/13/2015] [Indexed: 11/27/2022]
Abstract
The aim of this study was to evaluate the effect of protein reduction and supplementation of l-glutamic acid in male broiler diets. A total of 648 chicks of the Cobb 500 strain were distributed in a completely randomized design with six treatments and six replications with eighteen birds per experimental unit. The study comprised pre-starter (1-7 days), starter (8-21 days), growth (22-35 days) and final (36-45 days) phases. The first treatment consisted of a control diet formulated according to the requirements of essential amino acids for each rearing phase. The second and third treatments had crude protein (CP) reduced by 1.8 and 3.6 percentage points (pp) in relation to the control diet respectively. In the fourth treatment, l-glutamic acid was added to provide the same glutamate level as the control diet, and in the last two treatments, the broilers were supplemented with 1 and 2 pp of glutamate above that of the control diet respectively. The reduction in CP decreased the performance of broilers and the supplementation of l-glutamic acid did not influence performance when supplied in the diets with excess of glutamate. The lowest excreted nitrogen values were observed in the control diet, and treatments 2 and 3, respectively, in comparison with treatments with the use of l-glutamic acid (5 and 6). Retention efficiency of nitrogen was better in the control diet and in the treatment with a reduction of 1.8 pp of CP. It was verified that the serum uric acid level decreased with the CP reduction. A reduction in CP levels of up to 21.3%, 18.8%, 18.32% and 17.57% is recommended in phases from 1 to 7, 8 to 21, 22 to 35 and at 36 to 42 days, respectively, with a level of glutamate at 5.32%, 4.73%, 4.57%, 4.38%, also in these phases.
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Affiliation(s)
- R M Bezerra
- Department of Animal Science, Federal University of Paraíba, Areia, Paraíba, Brazil
| | - F G P Costa
- Department of Animal Science, Federal University of Paraíba, Areia, Paraíba, Brazil
| | - P E N Givisiez
- Department of Animal Science, Federal University of Paraíba, Areia, Paraíba, Brazil
| | - E R Freitas
- Department of Animal Science, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - C C Goulart
- Department of Animal Science, State University of Acarau Valley, Sobral, Ceará, Brazil
| | - R A Santos
- Department of Animal Science, Federal University of Rio Grande do Norte, Macaíba, Rio Grande do Norte, Brazil
| | - J G Souza
- Department of Animal Science, Federal University of Rio Grande do Norte, Macaíba, Rio Grande do Norte, Brazil
| | - P A Brandão
- Department of Veterinary Medicine, Federal University of Campina Grande, Patos, Paraíba, Brazil
| | - M R Lima
- Department of Animal Science, Federal University of Paraíba, Areia, Paraíba, Brazil
| | - M L Melo
- Department of Animal Science, Federal University of Paraíba, Areia, Paraíba, Brazil
| | - V P Rodrigues
- Department of Animal Science, Federal University of Paraíba, Areia, Paraíba, Brazil
| | | | - D V G Vieira
- Department of Animal Science, Federal University of Paraíba, Areia, Paraíba, Brazil
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Sousa JPLD, Albino LFT, Vaz RGMV, Rodrigues KF, Stringhini JH, Knopp RM, Kaneko IN, Kreuz BS. Balanços nutricionais e excreção de nutrientes para frangos alimentados com dietas contendo fitase do 14.o ao 24.o dias de idade. REVISTA BRASILEIRA DE SAÚDE E PRODUÇÃO ANIMAL 2014. [DOI: 10.1590/s1519-99402014000200014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Objetivou-se com este estudo avaliar o efeito da redução de nutrientes e energia suplementada ou não com fitase para frango de corte na fase 14 a 24 dias de idade no consumo, excreção e balanço de nitrogênio, de cálcio e de fósforo. Foram distribuídos 392 frangos de corte em delineamento inteiramente casualizado, utilizando-se arranjo fatorial 3 x 2 + 1 que consistiram de nível reduzido de cálcio e fósforo; níveis reduzidos de aminoácidos e energia; níveis reduzidos cálcio, fósforo, aminoácidos e energia x com e sem enzima + controle positivo, totalizando sete tratamentos com oito repetições de sete aves por unidade experimental. Nas dietas com fitase utilizou-se 500 FTU de fitase/kg de ração. Os dados foram submetidos à análise de variância e as médias comparadas por contrastes ortogonais através do teste F. Os resultados demonstram que a enzima fitase utilizada permitiu diminuir a quantidade de nutriente e energia das rações, proporcionando redução de 21,34% na excreção de cálcio e balanço de cálcio de 20,16%. Similarmente, reduções das quantidades de excreção de nitrogênio em 7,56% e fósforo em 21,34%, diminuindo a excreção desses nutrientes e aumentando o balanço de nitrogênio e fósforo em 9,41 e 33,94% em média, respectivamente.
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