Diets formulated on total or digestible amino acid basis with different energy levels and physical form on broiler performance

Maiorka, Alex; Dahlke, Fabiano; Penz, Antônio Mário; Kessler, Adriana

doi:10.1590/s1516-635x2005000100008

Cited by 15 publications

(9 citation statements)

References 6 publications

(6 reference statements)

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“…The physical form of pre-start diet (1-7 days) influences the performance of broilers until the end of the initial phase (8-21 days old), but the effects diminish until slaughter age with no effect on carcass characteristics (Freitas et al, 2009). Several studies are in line with the increase of broiler performance when processed diets are offered, which is mostly explained both by improvements in weight gain and feed conversion (Jones et al, 1995;Scott et al, 1997;Leeson et al, 1999;Lecznieski et al, 2001;Vargas et al, 2001;Greenwood et al, 2004;Silva et al, 2004;Maiorka et al, 2005;Lara et al, 2008); development of the digestive tract (Shamoto & Yamauchi, 2000; Feeding Behaviour of Broiler Chickens: a Review on the Biomechanical Characteristics Engberg et al, 2002;Dahlke et al, 2003;Zang et al, 2009); increasing of feed density leading both to nutrient intake and to growth rate (Engberg et al, 2002;McKinney & Teeter 2004;Lemme et al, 2006;Freitas et al, 2008;Meurer et al, 2008;Freitas et al, 2009); greater nutrient digestibility (Moreira et al, 1994;Vargas et al, 2001;Goodband et al, 2002;Freitas et al, 2008;Zang et al, 2009); reduction on particles selectivity by the birds and better palatability (Gadzirayi et al, 2006;Lara et al, 2008); minimization of energy expenditure during feeding (Nir, et al, 1994c;Leeson et al, 1999;Jensen, 2000;López et al, 2007); decreasing of wastage (Jensen, 2000;…”

Section: Feeding Behaviour Of Broiler Chickens: a Review On The Biomementioning

confidence: 85%

Feeding behaviour of broiler chickens: a review on the biomechanical characteristics

Neves

Banhazi

Nääs

2014

Rev. Bras. Cienc. Avic.

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Feed related costs are the main drivers of profitability of commercial poultry farms, and good nutrition is mainly responsible for the exceptional growth rate responses of current poultry species. So far, most research on the poultry feeding behaviour addresses the productivity indices and birds' physiological responses, but few studies have considered the biomechanical characteristics involved in this process. This paper aims to review biomechanical issues related to feed behaviour of domestic chickens to address some issues related to the feed used in commercial broiler chicken production, considering feed particle size, physical form and the impact of feeders during feeding. It is believed that the biomechanical evaluation might suggest a new way for feed processing to meet the natural feeding behaviour of the birds.

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Section: Feeding Behaviour Of Broiler Chickens: a Review On The Biomementioning

confidence: 85%

Feeding behaviour of broiler chickens: a review on the biomechanical characteristics

Neves

Banhazi

Nääs

2014

Rev. Bras. Cienc. Avic.

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“…In addition, in many studies it was observed that pellet diets improve FCR compared to mash feed. These improvements have been associated with greater digestibility of nutrients and less feed wastage and microbial load (Kilburn & Edwards 2001, Engberg et al 2002, Maiorka et al 2005, Salari et al 2006, Amerah et al 2007, Attia et al 2012. The nutritive value of pellet diets may be improved as a result of increasing starch gelatinization in the pellet process (Heffner & Pfost 1973, Moritz et al 2005.…”

Section: Discussionmentioning

confidence: 99%

“…Investigations have to be continued to decrease cost of broiler production and improve broiler performance. Pellet feed has been shown to have the greatest potential to improve feed conversion ratio (FCR) and reduce cost compared to mash feed (Maiorka et al 2005, Salari et al 2006, Amerah et al 2008. These improvements have been associated with changes in nutrients, digestibility and less feed wastage (Amerah et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Effect of feed form, pellet diameter and enzymes supplementation on growth performance and nutrient digestibility of broiler during days 21-37 of age

et al. 2014

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A total of 420 21-day-old broilers were wing banded and randomly distributed among 60 cages of 7 birds per cage during days 21-37 of age. A factorial design (4×3) was used in which there were four feed forms (mash vs. pellet diet with diameter 2-2 mm, 2-3 mm and 3-3.5 mm, respectively) and three enzyme treatments (unsupplemented, phytase, phytase plus multi-enzyme). Each treatment was replicated 5 times with 7 broilers per replicate. Body weight gain of broilers fed 2-3 mm-diet was significantly greater than that of those fed mash diet and 2-2 mm or 3-3.5 mm pellet-diet. Feed conversion ratio was the best in broilers fed 2-3 mm and 3-3.5 mm pellet-diets. However, feed intake was significantly lower in broilers fed pellet-diets than that of those fed the mash diet. The production index and economic efficiency were significantly higher in groups fed 2-3 mm pellet diameter compared to those fed 2-2 mm and 3-3.5 mm pellet diets. Digestibility of crude protein, ether extract, crude fibre and crude ash were significantly and similarly greater in groups fed pellet diets in comparison with those fed mash diet. Enzyme supplementations significantly and similarly increased growth and production index whereas improved feed conversion ratio and economic efficiency than the control group and this concurred with greater digestibility of crude protein, ether extract and crude ash. However, multi-enzymes plus phytase induced greater effect on the production and economic traits than phytase alone showing synergetic effects. Pellet diet at 2-3 mm supplemented with multi-enzyme plus phytase resulted in the highest performance and nutrient digestibility of broilers during day 20-37 d of age.

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“…In addition, recent interest in poultry feed formulation has led to take into account the digestible amino acids rather than total (Khaksar and Golian, 2009). In this regard, there have been a number of papers demonstrating the advantages of using digestible rather than total amino acids to formulate broiler diets (Maiorka et al, 2004(Maiorka et al, , 2005Farrell et al, 1999). However, no reports on the interaction between this method of amino acid formulation and the use of soybean oil with dietary bile salts found in broiler chickens.…”

Section: Introductionmentioning

confidence: 99%

Growth performance, carcass characteristics and blood metabolites of broiler chickens fed diets formulated on total or digestible amino acids basis with bovine bile salts powder and soybean oil

Rezaeipour¹,

Alinejad²,

Asadzadeh³

2016

JCEA

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An experiment was conducted to evaluate the growth performance, carcass characteristics and blood metabolites of broiler chickens fed diets formulated on total or digestible amino acids (TAA or DAA) basis with bovine bile salts powder (BBSP) and different levels of soybean oil (SO). A total of two hundred and forty 1-day old chicks were randomly allocated to eight treatments with three replicates of 10 birds. The experiment was carried out in a completely randomized design with 2×2×2 factorial arrangement, including two levels of BBSP, two levels of SO and two methods of amino acids balance (TAA or DAA) in diets. The results showed that main effects of BBSP, SO and feed formulation procedures (TAA or DAA) had no effects on all growth performance parameters (P > 0.05). Carcass traits, except for thigh weight, were not influenced by all dietary treatments (P > 0.05). The birds fed diets with BBSP had a greater thigh weight than the other group. The results of blood biochemical metabolites indicated that serum triglyceride was affected by amino acid formulation method (P < 0.05). In contrast, the other serum metabolites did not alter by dietary treatments (P > 0.05). The results indicated that liver enzymes activities including alanine aminotransferase (ALT) and aspartate aminotransferase (AST) were not influenced by dietary BBSP and SO (P > 0.05). However, AST activity was affected by amino acids formulation procedure (P < 0.05). In conclusion, the addition of bile salts (BBSP), different inclusion rate of SO and amino acids balance method (DAA or TAA) in broiler diets had no negative effects on all growth performance and carcass traits.

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Diets formulated on total or digestible amino acid basis with different energy levels and physical form on broiler performance

Cited by 15 publications

References 6 publications

Feeding behaviour of broiler chickens: a review on the biomechanical characteristics

Feeding behaviour of broiler chickens: a review on the biomechanical characteristics

Effect of feed form, pellet diameter and enzymes supplementation on growth performance and nutrient digestibility of broiler during days 21-37 of age

Growth performance, carcass characteristics and blood metabolites of broiler chickens fed diets formulated on total or digestible amino acids basis with bovine bile salts powder and soybean oil

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