Navegando por Autor "Fassani, Édison José"

Agora exibindo 1 - 2 de 2

Evaluation of the use of probiotic (Bacillus subtilis C-3102) as additive to improve performance in broiler chicken diets
(Brazilian Journal of Animal Science, 2012-11) Nunes, Jaqueline Oliveira; Bertechini, Antonio Gilberto; Brito, Jerônimo Ávito Gonçalves de; Fassani, Édison José; Mesquita, Fabrício Rivelli; Makiyama, Letícia; Meneghetti, Camila
The objective of this experiment was to evaluate the use of probiotic based upon Bacillus subtilis C-3102 (BS) in broiler diets containing or not conventional additive growth-promoter (AGP). A total of 1,824 one-day-old chicks of the Cobb-500 strain were used and distributed into 48 plots (1.50 × 2.00 m). A completely randomized design with four treatments and 12 repetitions was adopted. The treatments evaluated were: 1- Negative Control - AGP-free diet (NC); 2 - Positive Control, with AGP halquinol 30 mg/kg diet (PC); 3 - NC + BS (3x105 cfu/g diet); and 4 - PC + BS (3x105 cfu/g diet). The diets were on corn, soybean meal and meat and bone meal basis, formulated according to the nutrient allowances of the Strain Cobb Guide, following a feed program with three diets (starter, grower and finisher). At 21 and 42 days of age, feed intake, weight gain and feed conversion were evaluated, and carcass yield characteristics were determined at 42 days of age. Throughout the trial period (starter and total phases), better feed conversion was found for broilers fed diet with both additives (AGP and BS) combined. At the end of the experiment (1 to 42 days), the highest weight gain also occurred in broilers fed diets with a combination of the two additives. In present study, the use of BS or AGP alone in diets did not affect the performance of broilers. The carcass yield was not influenced by the use of the additives and beneficial effects of supplementation of BS and AGP combined in the diet on broiler performance were observed.
Relação lisina digestível:proteína bruta em dietas para frangos de corte no período de 1 a 21 dias de idade. Desempenho e metabolismo
(Revista Brasileira de Zootecnia, 2007-09-04) Rodrigues, Kênia Ferreira; Rodrigues, Paulo Borges; Freitas, Rilke Tadeu Fonseca de; Bertechini, Antonio Gilberto; Albino, Luiz Fernando Teixeira; Fassani, Édison José
Objetivou-se neste experimento testar diferentes relações lisina digestível:proteína bruta (PB) em dietas para frangos de corte na fase inicial de criação. Utilizou-se um lote misto de 1.800 aves da linhagem Cobb, com um dia de idade. O delineamento foi inteiramente casualizado com um modelo de classificação hierárquica com três níveis de PB e quatro relações lisina digestível:PB. No ensaio de desempenho, as rações foram fornecidas a 30 aves em cada uma das cinco repetições. Aos 21 dias de idade, avaliaram-se consumo de ração, ganho de peso e conversão alimentar. Não houve efeito significativo das diferentes relações dentro dos três níveis de PB. Observou-se comportamento linear do ganho de peso nas relações de lisina dentro dos níveis de 18,5 e 21,5% de PB. A conversão alimentar melhorou linearmente segundo as relações de lisina dentro dos três níveis de PB estudados. O rendimento de carcaça elevou-se linearmente com o aumento das relações no nível de 15,5% de PB, não sendo significativo nos demais níveis. No ensaio de metabolismo, as relações lisina digestível:proteína bruta apresentaram efeito linear sobre a EMAn (21,5% de PB) e excreção de nitrogênio (18,5% de PB) e efeito quadrático sobre a EMAn (15,5 e 18,5% de PB) e o coeficiente de retenção de N (15,5% de PB). Considerando os resultados de ganho de peso, a relação ideal de lisina digestível:proteína bruta na fase inicial foi de 6,8% (18,5% de PB) e 5,9% (21,5% de PB) ou 1,26 e 1,27% de lisina digestível. Os teores de PB das rações para frangos de corte na fase inicial podem ser reduzidos para 18,5%, sem afetar o desempenho das aves, mas reduzindo a excreção de nitrogênio em 24%, desde que as rações sejam suplementadas com aminoácidos sintéticos. The experiment aimed to test different ratios digestible lysine:crude protein (CP) in diets for broiler until 21 days. One thousand and eight hundred 1-d birds of Cobb strain were allotted to a completely randomized design with a hierarchical rank model with three levels of CP and four ratios digestible lysine:CP was used. In the performance trial, the diets were fed to 30 birds in each of the five replicates. At 21 days of age, feed intake, weight gain and feed conversion were evaluated. A linear increase on weight gain was observed in the 18.5 and 21.5% of CP levels. Feed conversion improved linearly according to the ratios of lysine within the three levels of CP studied. Carcass yield increased linearly with increasing rations at the level of 15.5% of CP, it not being significant at the other levels of CP studied. In the metabolism trial, the ratios digestible lysine:CP showed linear effect on EMAn (21.5% of CP) and nitrogen excretion (18.5% of CP), quadratic effect on EMAn (15.5 and 18.5% of CP) and N retention coefficient (15.5% of CP). Based on the results of weight gain, the ideal digestible lysine:CP ratio in the initial phase was of 6.8% (18.5% of CP) and 5.9% (21.5% of CP), or 1.26 and 1.27% of digestible lysine. The dietary CP contents fed to broilers in the initial phase can be reduced to 18.5%, with no effect on bird performance, but by decreasing nitrogen excretion to 24%, since the diets are supplemented with synthetic aminoacids.