Uso de enzimas em dietas contendo níveis crescentes de farelo de arroz integral para frangos de corte

Bonato, Elivelton Luiz; Zanella, Irineo; Santos, Ricardo dos; Gasparini, Sandra Paula; Magon, Leandro; Rosa, Alexandre Pires; Brittes, Lourdes Padilha

doi:10.1590/s0103-84782004000200027

Cited by 6 publications

(10 citation statements)

References 5 publications

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“…Feed intake was the least in birds fed rice bran, broken rice and in fasting birds, noting that the latter started to receive feed ad libitum on the 10th experimental day. This agrees with Bonato et al (2004), who, studying feeds with increasing levels of rice bran, observed the occurrence of a decrease in feed intake when birds were fed levels of rice bran addition above 30%. Similar results were found by Santos et al (2004), who observed that as level of inclusion of rice bran in the diet was increased, the feed intake and body weight of birds decreased.…”

Section: Resultssupporting

confidence: 91%

Feed type for induced molting of commercial layer hens

et al. 2014

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-An experiment employing three hundred and twenty 81-week-old Lohmann LSL commercial-breed hens was conducted to compare alternative induced-molting methods with the conventional method (fasting). Induced molting lasted 28 days at most, production and quality being monitored for four periods of 28 days thereafter. A completely randomized experimental design with five treatments, eight replicates of eight birds each per plot was adopted. The following experimental treatments were applied until a loss of 26% of body weight was reached: T1 -fasting, T2 -wheat bran ad libitum, T3 -rice bran ad libitum, T4 -cracked rice ad libitum, T5 -ground alfalfa ad libitum. Birds were then fed production diet ad libitum, except for those on treatment T1 (fasting) which received 30, 60 and 100 g/bird/day and then feed ad libitum. During induced molting the birds were exposed to a natural photoperiod and at day 28 that period was increased by 30 minutes/week until reaching 16 hours of light/day. The characteristics evaluated during induced molting were: feed intake, body weight changes and laying percentage. In the post-molt period, performance (feed intake, laying percentage, egg weight, egg mass, feed conversion ratio per dozen and per egg mass and percentage of broken eggs) and egg quality (specific gravity, eggshell breaking strength, percentages of eggshell, yolk, and albumen, eggshell thickness, yolk color and Haugh unit) were evaluated. Every 28 days one egg was collected from each repetition for three consecutive days for quality assessment. The use of rice bran and wheat bran is viable as molting inducers since the birds given those treatments display performance and egg quality similar to those fasted during the induced molting and also because these ingredients promote easier handling, eliminates the need for grinding and feed-mixing equipment and, being less aggressive, provide greater bird welfare.

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Section: Resultssupporting

confidence: 91%

Feed type for induced molting of commercial layer hens

et al. 2014

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“…The nutritional reduction of the diets was not offset by the effect of the enzyme complexes under study. This result corroborates other authors who reported effects of diet density on broiler performance despite enzyme supplementation (Bonato et al 2004). In practical terms, this result demonstrates that for the products tested here to be used without performance losses, these levels should be reduced to no more than 100 Kcal ME/kg apparent ME, 3% limiting AA, and 2 units of crude protein.…”

Section: Factorsupporting

confidence: 93%

Evaluation of the “Enzymmix F” Product as an Additive for Broilers Reared in an Antibiotic-Free System

Pereira¹,

Pereira²,

Filho³

et al. 2018

RBAS

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This experiment was undertaken to compare the effects of using the Enzymmix F product with a Brazilian enzyme blend in diets with different nutritional levels. A total of 1,080 male broiler chicks were distributed into a randomized-block design with a 3 × 2 factorial arrangement consisting of three enzyme complexes (Enzyme Blend, Enzymmix F, and the combination of both) and two nutritional levels (regular and reduced). We evaluated the birds' performance in the periods of 1 to 21 and 1 to 42 days of age. The yields of carcass and cuts and intestinal integrity were evaluated at 45 days of age. During the analyzed periods, no significant difference was observed for the performance parameters considering the "enzyme" factor. However, the reduction in the nutritional level of the diet resulted in inferior performance in both periods. There was no statistical difference for the yields (%) of carcass and cuts. Enzymmix F provided the greatest villus height in the jejunum segment. The use of the Enzyme Blend in the nutritionally reduced diet led to a lower crypt depth. In conclusion, Enzymmix F increased the weight of wings (g) and the villus height in the jejunum.

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“…Pelos resultados obtidos, observou-se que houve diferença significativa (P<0,01) entre os tratamentos para ganho de peso e conversão alimentar, sem haver, portanto, interferência da utilização da fitase sobre as duas rações sugeridas pelas empresas. Estes resultados coincidem com os obtidos por Bonato et al (2001), McKnight (1999 e Sebastian et al (1996).…”

Section: Período De Crescimento (22 a 35 Dias De Idade)unclassified

Efeito da adição de fitase em rações de frangos de corte, durante as fases de crescimento e final

et al. 2007

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Os experimentos tiveram como objetivo avaliar os efeitos da enzima fitase nas rações de frangos de corte sobre o desempenho e avaliação de carcaça durante os períodos de crescimento (21 a 35 dias) e final (36 a 45 dias de idade). Duas rações comerciais foram utilizadas, sendo a primeira formulada por uma empresa integradora de frangos de corte (E-1) e a segunda sugerida pela empresa fornecedora da enzima (E-2). Os tratamentos foram: T1 e T4 - ração sem adição da enzima e T2 e T3 - ração com fitase. O delineamento experimental utilizado foi o inteiramente casualizado, em arranjo fatorial 2 x 2 (duas rações e dois níveis de enzima), com nove repetições e trinta aves por parcela. A enzima fitase foi adicionada na quantidade de 100 g/t. Houve diferença significativa (P<0,01) para ganho de peso e conversão alimentar na fase de crescimento, não ocorrendo o mesmo na fase final (P>0,05). Quanto à avaliação dos rendimentos de partes das aves, só o de pernas apresentou diferença significativa com a ração formulada pela E-2, sem fitase. As rações formuladas pela E-1 apresentaram melhores resultados de desempenho, quando comparadas com as rações sugeridas pela E-2.

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Uso de enzimas em dietas contendo níveis crescentes de farelo de arroz integral para frangos de corte

Cited by 6 publications

References 5 publications

Feed type for induced molting of commercial layer hens

Feed type for induced molting of commercial layer hens

Evaluation of the “Enzymmix F” Product as an Additive for Broilers Reared in an Antibiotic-Free System

Efeito da adição de fitase em rações de frangos de corte, durante as fases de crescimento e final

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