Effect of supplemental fat in low energy diets on some blood parameters and carcass characteristics of broiler chicks

Monfaredi, A; Rezaei, Mansour; Sayyahzadeh, H.

doi:10.4314/sajas.v41i1.66036

Cited by 18 publications

(15 citation statements)

References 29 publications

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“…A greater level of saturation of dietary fat also increases the proportional weight of the abdominal fat pad (Crespo and Esteve Garcia, 2001). Additionally, in latter age periods, BW gain was increased with fat content due to increased abdominal deposition (Monfaredi et al, 2011). The reason for such a difference in fat types was originally explained through the effect of viscosity on fat emulsification; that is, tallow is harder to emulsify than soy oil and therefore is most susceptible to changes in intestinal viscosity.…”

Section: Discussionmentioning

confidence: 96%

The effect of reduced calorie diets, with and without fat, and the use of xylanase on performance characteristics of broilers between 0 and 42 days

O’Neill

Mathis²,

Lumpkins³

et al. 2012

Poultry Science

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When decreasing the energy value of broiler diets, nonstarch polysaccharide degrading enzymes, such as xylanase, are often used. In doing so, they are assigned an energy value and considered to contribute energy to the diet. The aim of this study was to determine the effect of decreasing energy in a broiler diet by 100 kCal/kg on performance and whether the expected drop in performance could be recovered with the use of xylanase. Two formulations were used to provide decreased energy diets, both with and without supplementary fat. Six hundred 1-d-old male Cobb broilers were placed in a 2 × 3 full factorial design in 5 randomized complete blocks. The treatments were enzyme dose at 0 or 16,000 U/kg, and the 3 different diets [positive control (PC), negative control 1, without fat (NC1), and negative control 2 with fat (NC2)]. At no point were there any interactions between diet type and enzyme inclusion; where there was an effect of xylanase, it was consistent regardless of the diet type. There was a significant effect of diet type on feed intake between d 0 to 35; NC1 and NC2 had significantly increased feed intake compared with the PC (P = 0.006). The feed conversion ratio was significantly increased in birds fed the negative control diets during 0 to 35 d and 0 to 42 d (P = 0.003 and P = 0.002, respectively). However, feed conversion ratio was significantly improved by the addition of enzyme during periods 0 to 35 d and 0 to 42 d. There were no significant main effects between d 0 and 21 (all responses P > 0.1). Liveability was not affected by any of the treatments (P > 0.1). Decreasing energy in broiler diets results in worsened performance. The use of xylanase may improve feed conversion ratio. The use of some fat may help, so the whole diet composition should be considered in conjunction with enzyme dose to achieve the best advantage.

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Section: Discussionmentioning

confidence: 96%

The effect of reduced calorie diets, with and without fat, and the use of xylanase on performance characteristics of broilers between 0 and 42 days

O’Neill

Mathis²,

Lumpkins³

et al. 2012

Poultry Science

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“…Lower abdominal fat percentage found in the broiler chickens fed on the SO-containing diets compared with those receiving the PF-containing diets may be attributable to various metabolic uses of the absorbed dietary fats. It is hypothesised that the influence of dietary fat on tissue fat deposition may be associated with the fact that energy from the SFA is less readily used for metabolic purposes rather than PUFA and thus accumulates as body lipid (30) . The higher percentage of abdominal fat in the PF-fed broilers in the present study is also consistent with a higher n-6:n-3 PUFA ratio in the PF-containing diet (Table 2), possibly suggesting the elevation of the inflammatory response.…”

Section: Discussionmentioning

confidence: 99%

Nutritional and physiological responses of broiler chickens to dietary supplementation with de-oiled soyabean lecithin at different metabolisable energy levels and various fat sources

et al. 2019

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A 42-d study was conducted to investigate the effects of an emulsifier supplementation (de-oiled soyabean lecithin (DSL)) of diets with different levels of metabolisable energy (ME) and various sources of fat on growth performance, nutrient digestibility, blood profile and jejunal morphology of broiler chickens. Diets were arranged factorially (2 × 2 × 2) and consisted of two concentrations of ME (normal and low), two fat sources (soyabean oil (SO) and poultry fat (PF)) and two levels of DSL supplementation (0 and 1 g/kg). A total of 800 1-d-old male broiler chickens were assigned to eight treatments with five replicates/treatment. The results showed the supplemental DSL caused improvements in the overall feed conversion ratio, fat digestibility and jejunal villus height:crypt depth ratio, but the magnitude of the responses was greater in the PF-containing diets, resulting in significant fat × DSL interactions (P<0·05). Abdominal fat percentage was also reduced by the PF-containing diet, but the response was greater in the normal ME diet, resulting in a significant ME × fat interaction (P = 0·048). Dietary DSL supplementation also increased nitrogen-corrected apparent ME values but decreased blood TAG (P = 0·041) and LDL (P = 0·049) concentrations, regardless of the source of fat used or the ME values in the diet. In conclusion, the present study suggests that the improvements in growth performance, fat digestibility and intestinal morphology that can be achieved with DSL supplementation are highly dependent on the degree of saturation of lipid incorporated into broiler chicken diets.

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“…Diets rich in unsaturated fatty acids have been found to reduce fat deposition in broiler chicks when compared to diets supplemented with the same inclusion rate of fats rich in saturated fatty acids (Sanz et al, 1999). Monfaredi et al (2011) reported that supplementation of broiler diets with up to 40 g soybean oil*kg -1 feed significantly reduced abdominal fat in comparison with chicks receiving diets containing beef tallow.…”

Section: Discussionmentioning

confidence: 99%

“…However, results of some studies do not agree with the findings of present experiment. Monfaredi et al (2011) reported that serum glucose and cholesterol were affected by the use of soybean oil in broiler chickens. They stated that broilers fed diets supplemented with soybean oil had a lower glucose and cholesterol concentration compared with those fed dietary beef tallow.…”

Section: Discussionmentioning

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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Effect of supplemental fat in low energy diets on some blood parameters and carcass characteristics of broiler chicks

Cited by 18 publications

References 29 publications

The effect of reduced calorie diets, with and without fat, and the use of xylanase on performance characteristics of broilers between 0 and 42 days

The effect of reduced calorie diets, with and without fat, and the use of xylanase on performance characteristics of broilers between 0 and 42 days

Nutritional and physiological responses of broiler chickens to dietary supplementation with de-oiled soyabean lecithin at different metabolisable energy levels and various fat sources

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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