Effect of citric acid and microbial phytase enzyme on ileal digestibility of some nutrients in broiler chicks fed corn-soybean meal diets

Nourmohammadi, Rouhollah; Hosseini, Seyed Mohammad; Farhangfar, H; Bashtani, M

doi:10.4081/2326

Cited by 45 publications

(51 citation statements)

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“…These results are in agreement with those reported by Al-Harthi (2006) and Attia et al (2003aAttia et al ( , 2003bAttia et al ( , 2008. The improvement in BW and BWG which resulted from supplementation of either multienzyme plus phytase or phytase alone may be due to the improvement in the availability and absorption of nutrients through increasing the digestibility of the ingested diets, as proposed by Attia (2003), Choct (2006), Abudabos (2012), and Nourmohammadi et al (2012). However, the effect of phytase and multienzyme depends on dietary composition and type of enzyme (Zanella et al, 1999;Attia, 2003).…”

Section: Discussionsupporting

confidence: 83%

“…Supplementing multi-enzyme or phytase to corn-soy based broiler diets increased growth performance in comparison to unsupplemented diets (Kavitha et al, 2003;Choct, 2006). However, improved performance of poultry depends on dietary composition and type of supplemented enzyme (Attia, 2003;Abudabos, 2012;Nourmohammadi et al, 2012). The use of an enzyme complex containing carbohydrases and phytase should improve the ability of broilers, laying hens, ducks and Japanese quail to use the energy, protein, P and Ca they obtain from the diet (Attia, 2003;Attia et al, 2003aAttia et al, , 2003bAttia et al, , 2008Cowieson et al, 2006;Yang et al, 2010) and a small amount of these nutrients can be added to the diet.…”

Section: Introductionmentioning

confidence: 99%

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Effect of phytase with or without multienzyme supplementation on performance and nutrient digestibility of young broiler chicks fed mash or crumble diets

Attia¹,

El-Tahawy²,

El-Hamid³

et al. 2012

Italian Journal of Animal Science

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A total of 210 unsexed 1-day old Arbor Acres broiler chicks were wing banded and randomly distributed among 30 cages of 7 birds per cage keeping equal initial BW during days 1-20 of age. A factorial design (2×3) was used in which there were two feed forms (mash vs crumble diet) and three enzyme treatments (unsupplemented, phytase, phytase plus multienzyme). Each treatment was replicated 5 times with 7 chicks per replicate. Body weight (BW), body weight gain (BWG) and feed conversion ratio (FCR) of fed chicks were significantly improved when the crumble diet was administered. However, feed intake of chicks fed on the crumble feeds was significantly lower than those fed the mash diet. Digestibility of ether extract and crude fiber was significantly greater in groups fed the crumble diet than those fed the mash diet. Enzyme supplementation significantly and similarly increased growth and production index, and improved FCR. Also greater digestibility of crude protein and crude ash was observed but growth during days 8-14 of age and crude fibre digestibility were significantly greater in chicks receiving the multienzyme plus phytase supplement than those receiving phytase alone. Crumble feed supplemented with multienzyme resulted in the highest performance and nutrient digestibility of broilers during days 1-20 of age.

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Section: Discussionsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Effect of phytase with or without multienzyme supplementation on performance and nutrient digestibility of young broiler chicks fed mash or crumble diets

Attia¹,

El-Tahawy²,

El-Hamid³

et al. 2012

Italian Journal of Animal Science

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“…The improved performance may be due to decreased pH of the gut segment contents, the positive effect on gut size and morphometry as well as increased nutrient digestibility (Nourmohammadi et al, 2012). The main objectives of the present study were to determine the effects of high dietary levels of CA (60 g kg −1 ) in broiler chickens.…”

Section: Discussionmentioning

confidence: 99%

“…The recommended level for CA inclusion in poultry diets were confined to 0.5 to 1.5 % in the pioneer research. Indeed, early reports suggested low dietary levels of CA, but the recommended level has gradually increased to 2 % (Brenes et al, 2003), 2.5 % (Centeno et al, 2007), 3 % (Aydin et al, 2010), 4 % (Esmaeilipour et al, 2011), 5 % (Salgado-Tránsito et al, 2011 and even higher levels of 6 % (Nourmohammadi et al, 2012) and 7.5 % (Islam, 2012) of the poultry diets. Despite inconsistent results, it was concluded that CA at the dietary levels of 1 to 3 % promotes productive performance and gut health in broiler chickens (Boling et al, 2000;Boling-Frankenbach et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Acidic stress caused by dietary administration of citric acid in broiler chickens

Nourmohammadi

Khosravinia

2015

Arch. Anim. Breed.

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Abstract. Citric acid (CA) is commonly used in poultry diets to promote growth by acidifying the gastrointestinal contents, improving nutrient digestibility, and reducing pathogen loads; therefore, this study was conducted to demonstrate the effects of 0, 30 and 60 g of CA per kilogramme of diet on productive performance, selected blood metabolites, immune response and certain gut-related variables in broiler chickens using 150, 7-day-old Ross 308 male broiler chicks in five replicates of 10 birds each per diet. Growth performance, daily feed intake and tibia phosphorous (P) retention were significantly improved by the diets containing 30 g kg −1 of CA (P < 0.01) but were suppressed as CA increased to 60 g kg −1 . Dietary CA increased proventriculus, gizzard and ileum percentage and villus length, crypt depth and goblet cell number in duodenum, jejunum and ileum as well as ileal digestibility of crude protein, apparent metabolisable energy and total phosphorus while it decreased the pH of contents in the gut segments concerned (P < 0.01). Diets containing 60 g kg −1 of CA significantly reduced plasma P and Fe levels as well as cholesterol level and Alkaline phosphatase activity (P < 0.05) while increasing the aspartate aminotransferase and lactate dehydrogenase activities (P < 0.01) in the blood serum of the birds at day 42 of age. The percentage of bursa and thymus was greater in the birds fed on diets containing 60 and 30 g kg −1 of CA, respectively (P < 0.01). It was concluded that inclusion of 60 g kg −1 of CA in the diet resulted in a severe reduction in performance, nutrient digestion and absorption and liver dysfunctions in broiler chickens, a phenomenon we call as acidic stress.

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“…It is postulated that excessive amounts of dietary citric acid inclusion may compromise performance because two experiments using 60 g/kg citric acid in diets reported significant decreases in body weight gain. (Patten and Waldroup, 1988;Alçiçek et al, 2004;Leeson et al, 2005;Gunal et al, 2006;Hernández et al, 2006;García et al, 2007;Paul et al, 2007;Biggs and Parsons, 2008;Pirgozliev et al, 2008;Samanta et al, 2008;Al-Kassi and Mohssen, 2009;Ao et al, 2009;Bozkurt et al, 2009;Chowdhury et al, 2009;Kim et al, 2009;Mahdavi and Torki 2009;Panda et al, 2009a,b;Haque et al, 2010;Nourmohammadi et al, 2010;Smulikowska et al, 2010;Esmaeilipour et al, 2011;SalgadoTránsito et al, 2011;Aghazadeh and Tahayazdi, 2012;Nourmohammadi et al, 2012;Świątkiewicz and Arczewska-Wlosek, 2012). 2 Detailed information for each organic acid was provided in the Tables 5 through 9.…”

Section: Citric Acidmentioning

confidence: 99%

Dietary organic acids for broiler chickens: a review

Kim¹,

Kim²,

Dy³

2015

Rev Colomb Cienc Pecu

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SummaryThe objective was to summarize and describe the possible mode of action of dietary organic acids and their effects on growth performance of broiler chickens. Previous experiments have suggested that dietary organic acids decrease pH in diets and subsequently reduce pH in the proximal and distal intestine, increase nutrient utilization, and inhibit pathogenic bacterial growth in the gastrointestinal tract (GIT). The degree of pH reduction is usually greater in the upper part of the GIT (crop, proventriculus, and gizzard) than in the lower part of the GIT (duodenum, jejunum, ileum, and cecum). Bactericidal effects of dietary organic acids have been observed for pathogenic bacteria and even for beneficial bacteria to some extent. However, few significant results regarding bacterial modulation in the GIT have been reported. Dietary organic acids can improve dry matter and protein utilization in some experiments, but the extent of improvement in nutrient utilization is smaller than has been anticipated. Growth performance is likely improved, but results have been inconsistent due to variations in sources and inclusion levels of dietary organic acids. Differences in other dietary components and experimental environments among previous experiments likely contribute to the variable results. This review suggests that the effects of dietary organic acids on broiler chickens are not fully understood. Further experiments are required to reliably demonstrate the mode of action of dietary organic acids and their growth-promoting effects on broiler chickens. Keywords: acidifiers, gastrointestinal pH, growth performance, microbial population, nutrient utilization. ResumenEl objetivo fue resumir y describir el posible modo de acción de los ácidos orgánicos en la dieta y sus efectos sobre el crecimiento de los pollos de engorde. Experimentos previos sugieren que los ácidos orgánicos dietarios disminuyen el pH de la dieta y posteriormente reducen el pH en el intestino proximal y distal, aumentan la utilización de los nutrientes, e inhiben el crecimiento de bacterias patógenas en el tracto gastrointestinal (GIT). El grado de reducción del pH es generalmente mayor en la parte superior (buche, proventrículo y molleja) que en la parte inferior del GIT (duodeno, yeyuno, íleon y ciego). Se han observado efectos bactericidas de los ácidos orgánicos sobre bacterias patógenas e incluso sobre bacterias beneficiosas en cierta medida. Sin embargo, se han reportado algunos resultados significativos con respecto a la modulación bacteriana en el GIT. Los ácidos orgánicos en la dieta pueden mejorar la utilización de la materia seca y la proteína en algunos experimentos, pero el grado de mejora en la utilización de los nutrientes es más bajo que lo esperado. El crecimiento probablemente mejora, pero los resultados han sido inconsistentes debido a las variaciones en las fuentes y a los niveles de inclusión de los ácidos orgánicos en la dieta. Las diferencias en otros componentes de la dieta y entornos experimentales entre los ensayos anterio...

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Effect of citric acid and microbial phytase enzyme on ileal digestibility of some nutrients in broiler chicks fed corn-soybean meal diets

Cited by 45 publications

References 0 publications

Effect of phytase with or without multienzyme supplementation on performance and nutrient digestibility of young broiler chicks fed mash or crumble diets

Effect of phytase with or without multienzyme supplementation on performance and nutrient digestibility of young broiler chicks fed mash or crumble diets

Acidic stress caused by dietary administration of citric acid in broiler chickens

Dietary organic acids for broiler chickens: a review

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