Effect of dietary nutrient density and vitamin premix withdrawal on performance and meat quality of broiler chickens

Mirshekar, Reza; Dastar, B; Shábanpour, Bahareh; Hassani, S.

doi:10.1002/jsfa.6127

Cited by 13 publications

(18 citation statements)

References 43 publications

(98 reference statements)

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“…The LND vs HND diet contained less energy and nutrients by one percent point of crude protein (CP), 50 kcal of nitrogen-corrected true metabolizable energy, 0.05 percent point of available phosphate, and 0.05 percent point of lysine. These nutrient reduction can be considered moderate as compared with the previous studies ( Brickett et al, 2007 ; Zhao et al, 2009 ; Li et al, 2010 ; Mirshekar et al, 2013 ), in which the LND vs HND diet was formulated to reduce CP levels by 2 percent points, and energy levels by more than 150 kcal/kg of diet. Diet and water were provided ad libitum .…”

Section: Methodsmentioning

confidence: 84%

Growth Performance, Relative Meat and Organ Weights, Cecal Microflora, and Blood Characteristics in Broiler Chickens Fed Diets Containing Different Nutrient Density with or without Essential Oils

Kim

Lee

Kang

et al. 2016

Asian Australas. J. Anim. Sci

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The present study was conducted to investigate whether dietary essential oils could affect growth performance, relative organ weights, cecal microflora, immune responses and blood profiles of broiler chickens fed on diets containing different nutrient densities. A total of eight hundred-forty 1-d-old male broiler chicks were randomly allotted into twenty-eight pens (7 pens per treatment, 30 chicks per pen). There were four experimental diets containing two different nutrient densities and supplemented with or without essential oils. Experimental period lasted for 35 days. No clear interaction between nutrient density and essential oils on any of growth performance-related parameters was observed. Live body weights were affected (p<0.05) by nutrient density at 21 days and by dietary essential oils at 35 days. Essential oils significantly (p<0.05) increased daily body weight gain and feed conversion ratio during the periods of 22 to 35 and 1 to 35 days, but failed to affect feed intake during the entire experimental period. Daily weight gain at 1 to 21 days and feed intake at 1 to 21 and 1 to 35 days were significantly impaired (p<0.05) by nutrient density. There were significant treatment interactions (p<0.05) on relative weights of bursa of Fabricius and abdominal fat contents. Finally, either essential oil or nutrient density did not influence the relative percentages of breast and leg meats, the population of cecal microflora, blood parameters and antibody titers against Newcastle disease and infectious bronchitis in broiler chickens. It was concluded that dietary essential oils, independent to nutrient density, failed to stimulate feed intake, but increased growth performance in broiler chickens.

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Section: Methodsmentioning

confidence: 84%

Growth Performance, Relative Meat and Organ Weights, Cecal Microflora, and Blood Characteristics in Broiler Chickens Fed Diets Containing Different Nutrient Density with or without Essential Oils

Kim

Lee

Kang

et al. 2016

Asian Australas. J. Anim. Sci

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“…Birds were weighed and feed intake was measured weekly. At 42 days of age, following 6 h fasting, chickens were weighed and then slaughtered by cervical dislocation . First of all, liver samples were removed immediately.…”

Section: Methodsmentioning

confidence: 99%

Longer consumption of flaxseed oil enhances n‐3 fatty acid content of chicken meat and expression of FADS2 gene

Mirshekar

Boldaji

Dastar

et al. 2015

Euro J Lipid Sci & Tech

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The aim of this study was to evaluate the effect of different durations of flaxseed oil consumption on broiler performance, fatty acid content of meat and expression of FADS2 gene in the liver of chicken. A total of 336 unsexed day old chicks were randomly assigned to 7 dietary treatments with 4 replicates of 12 chickens in each. Body weight, weight gain, feed intake and feed conversion ratio were not affected by dietary treatments. Longer consumption of flaxseed oil resulted in higher deposition of long chain n‐3 fatty acids in broiler breast and thigh (P < 0.05). Regression analysis showed that feeding broilers with diet enriched with flaxseed oil 17 and 7 days prior to slaughter for breast and thigh respectively, is enough for producing n‐3 labeled meat. Weekly replacement of oil source of diet (soybean oil) with flaxseed oil increased expression of FADS2 gene. To incorporate enough n‐3 fatty acids into chicken meat through addition of flaxseed oil to broiler diet and to maximize de novo long chain n‐3 fatty acid synthesis in broiler body, we recommend adding flaxseed oil to broiler diets 17 days prior to slaughter. Practical applications: Omega‐3 enrichment of broiler chickens depends on both nutrition and gene expression. Flaxseed oil is an omega‐3 oil source that can be supplemented to broiler diet to enrich chicken meat with the beneficial n‐3 fatty acids. However, adding such oil sources to broiler rations is restricted because of their negative effects on broiler performance and meat quality. Therefore, shorter period of such oil sources consumption is preferred. Flaxseed oil consumption can affect gene expression too. Thus, it is necessary to determine the optimum duration of flaxseed oil supplementation to broiler diets to produce omega‐3 labeled chicken using both nutrition and gene expression. Flaxseed oil consumption can affect fatty acid profile of chicken meat through manipulation of fatty acid deposition, de novo fatty acid synthesis, fatty acid oxidation and expression of genes involved in fatty acid metabolism. To incorporate enough n‐3 fatty acids into chicken, providing at least 3 g n‐3 fatty acid per kilogram of meat, by adding flaxseed oil to broiler diet, we recommend adding flaxseed oil to broiler diets 17 days prior to slaughter.

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“…The effect of vitamin level in poultry diets on performance remains controversial. Khajali, Khoshoei, and Moghaddam (2007) reported that removing vitamin from broiler diets from 28 to 49 days of age had a little impact on growth performance, the same point was supported by Mirshekar, Dastar, Shabanpour, and Hassani (2013), in which vitamin withdrawal has no significant effect on 42-day broiler's body weight. Results from the growth performance were similar to those observed by Moravej, Alahyari-Shahrasb, Kiani, Bagherirad, and Shivazad (2013), in that broiler chickens fed five treatment groups (basal diet 0, 33%, 66%, 100%…”

Section: Discussionmentioning

confidence: 82%

Effects of commercial premix vitamin level on sternum growth, calcification and carcass traits in meat duck

Zhang

Liao

Zeng

et al. 2018

Animal Physiology Nutrition

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The present study was conducted to investigate the effects of dietary vitamin level on sternum growth, calcification and carcass traits in meat duck. A total of 432 1‐d‐old mixed‐sex Cherry Valley ducks (216 males and 216 females) were randomly allocated and fed low‐vitamin level diet (70% NRC vitamin regimen), high‐vitamin level diet (DSM vitamin regimen) or medium‐vitamin level diet (50% low‐vitamin level diet and 50% high‐vitamin level diet). Sternum and serum were harvested after 49 d of feeding. Compared with the low‐vitamin level group, dietary high‐vitamin level increased body weight (BW) at d 49 (p = 0.029) but did not alter all parameters of carcass trait (p > 0.05). Medium‐ and high‐vitamin level increased sternum defatted weight, density, ash and calcium (Ca) concentration (p < 0.05). Meanwhile, the medium and high‐vitamin level group significantly decreased the relative proportions of the keel cartilage at 49 d (p < 0.05) and decreased the sternum length and height (p < 0.05) in meat ducks at 49 d. Likewise, high‐vitamin level improved serum Ca and phosphate (P) content (p < 0.05) and declined serum Alkaline phosphatase (ALP) activity (p = 0.003) compared with the low‐vitamin level group. Our study indicates that high‐vitamin level did not affect the examined carcass traits; however, high‐vitamin level improved growth performance and sternum calcification.

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Effect of dietary nutrient density and vitamin premix withdrawal on performance and meat quality of broiler chickens

Abstract: Increasing dietary nutrient density improved broiler performance but impaired meat quality while vitamin premix withdrawal during finisher periods had no negative effect on broiler performance and meat quality.

Cited by 13 publications

References 43 publications

Growth Performance, Relative Meat and Organ Weights, Cecal Microflora, and Blood Characteristics in Broiler Chickens Fed Diets Containing Different Nutrient Density with or without Essential Oils

Growth Performance, Relative Meat and Organ Weights, Cecal Microflora, and Blood Characteristics in Broiler Chickens Fed Diets Containing Different Nutrient Density with or without Essential Oils

Longer consumption of flaxseed oil enhances n‐3 fatty acid content of chicken meat and expression of FADS2 gene

Effects of commercial premix vitamin level on sternum growth, calcification and carcass traits in meat duck

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