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

Brandão, Patrícia Araújo; Costa, Fernando Guilherme Perazzo; Brandão, Jocelyn Santiago; Silva, José Humberto Vilar da

doi:10.1590/s1413-70542007000200033

Cited by 13 publications

(16 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, in addition to the increasing number of broilers produced per year, modern commercial broiler strains present rapid growth, and consequently, diet formulation needs to follow up the changes in their nutritional requirements (Brandão et al, 2007). Phosphorus is nutritionally essential, as evidenced by the different roles it plays in metabolism, and it is particularly important for broiler growth (Assuena et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Effect of ph and temperature on the activity of phytase products used in broiler nutrition

Naves

Ad²,

Bertechini³

et al. 2012

Rev. Bras. Cienc. Avic.

View full text Add to dashboard Cite

The activity of three commercial microbial phytase (Aspergillus oryzae, A. niger, and Saccharomyces cerevisae) products used in broiler nutrition was determined at different pH (2.0 to 9.0) and temperature (20 to 90°C) values. Enzymatic activity was determined according to the reaction of the phytase with its substrate (sodium phytate), in four replicates, and was expressed in units of phytase activity (FTU). A. oryzae phytase exhibited optimal activity at pH 4.0 and 40°C, but its absolute activity was the lowest of the three phytases evaluated. A. niger phytase exhibited maximal activity close to pH 5.0 and 45 o C, whereas S. cerevisae phytase presented its highest activity at pH close to 4.5 and temperatures ranging between 50 and 60°C. It was concluded that A. niger and S. cerevisae phytase products exhibited the highest absolute activities in vitro at pH and temperature values (pH lower than 5.0 and 41 o C) corresponding to the ideal physiological conditions of broilers, which would theoretically allow high hydrolysis rate of the phytate contained in the feed.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of ph and temperature on the activity of phytase products used in broiler nutrition

Naves

Ad²,

Bertechini³

et al. 2012

Rev. Bras. Cienc. Avic.

View full text Add to dashboard Cite

show abstract

“…Working with phytase in diets for broilers, Brandão et al (2007) verified no effect of the enzyme in carcass, breast and abdominal fat yield. However, considering the reduction of the crude protein in the diets, Faria Filho et al (2005) verified that the reduction from 21.5 to 18.5% decreased the breast yield and increased the abdominal fat of the birds at 21 days of age.…”

Section: Resultsmentioning

confidence: 93%

Carcass characteristics of broilers at 42 days receiving diets with phytase in different energy and crude protein levels

Nagata¹,

Rodrigues

Alvarenga

et al. 2011

Ciênc. agrotec.

Self Cite

View full text Add to dashboard Cite

The aim of this study was to evaluate carcass characteristics and quality of breast meat after the inclusion of phytase in broiler diets with different levels of apparent metabolizable energy (AMEn) corrected for nitrogen and reduced crude protein (CP) supplemented with essential amino acids following the concept of ideal protein. A total of 1,500 Cobb broilers from 22 to 42 days (initial weight of 833 ± 7 g and final weight of 2741 ± 48 g) were distributed in completely randomized design in a factorial 3x3+1 experiment (three levels of AMEn - 2,950; 3,100 and 3,250 kcal/kg - and three levels of CP - 14, 16 and 18% - and an additional treatment - control without phytase, with 3,100 kcal/kg EMAn, 19.2% PB and 0.4% available phosphorus), in six replications of 25 birds each. At the end of the trial, two birds of each experimental unit were slaughtered in order to measure carcass yield and yields of parts and to determine the chemical composition of the breast meat. The levels of AMEn and CP of diets with phytase influenced (P<0.05) the carcass, breast and abdominal fat yield and humidity, protein and fat percentage in the pectoralis major muscle of the birds. The levels of 3,100 kcal AMEn/kg and 18% CP showed higher carcass and breast yield and lower abdominal fat deposition, although with higher fat percentage in the breast meat. It was concluded that the manipulation of the energy levels of diets with reduced crude protein supplemented with amino acids and phytase influenced the yields of parts of carcass and the breast meat quality of the broilers at 42 days.

show abstract

“…The efficiency of phytase enzyme in hydrolyzing mineralphytic-acid complex, leaving them free for absorption and contributing to bone mineralization is evidenced, justifying higher percentages of Ca and P in the treatments with phytase. Oliveira et al (2008), evaluating the tibia bone density in their different areas (middle and distal epiphyseal and diaphyseal), observed that reducing the levels of available phosphorus in diets for broilers also reduces the density of the tibia regions, while the inclusion of phytase in the diet increases the density of different regions, since there were higher phosphorus supplies for bone deposition, demonstrating that the use of this enzyme increases the utilization of the organic phosphorus which is in the form of phytate, reducing the cost of adding inorganic phosphorus to the diet as elucidated by Brandão et al (2007).…”

Section: Resultsmentioning

confidence: 97%

“…Thus, it emphasizes the importance of using best quality feeds and the use of additives that enable broilers to take advantage of the nutrients in feeds (Brandão et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Digestibility, Determination of Metabolizable Energy and Bone Mineralization of Broilers Fed with Nutritionally Valued Phytase

Litz

Fernandes

Bueno

et al. 2017

Rev. Bras. Cienc. Avic.

View full text Add to dashboard Cite

Animal nutrition, dicalcium phosphate, meatand-bone meal, tibia.Submitted: Juney/2016 Approved: November/2016 ABStRACtThe objective of this study was to evaluate the effect of using exoenzyme phytase in broiler's diets on digestibility of nutrients, feed energy and tibia bone mineralization. A completely randomized design was used, with the following treatments: sorghum with dicalcium phosphate (SDP), corn with dicalcium phosphate (CDP), sorghum with meat and bone meal (SMBM), sorghum with valued phytase (SVP) and sorghum with phytase without valued (SPWV). For digestibility analysis, eighty 15 day old broilers were used, a total of 1400 male Hubbard Flex chickens, which were submitted to total excreta collection to obtain the percentages of food digestibility, crude protein, ether extract, apparent metabolizable energy, calcium and phosphorus while for tibias mineralization. Six birds per treatment were used, where determination of mineral matter, calcium and phosphorus were performed. Metabolizable energy (ME) and apparent metabolizable energy corrected for nitrogen (AMEn) of the feed were also calculated. Data were subjected to variation analysis and the average compared by 5% Tukey test. There was no difference between treatments for the digestibility at 15-20 day old as well as for the feed energy values, but the diets with phytase had higher phosphorous percentage values for tibia bone mineralization, demonstrating that exogenous phytase enzyme is able to hydrolyze phytate origininated from plant and release the phosphorus for assimilation by animals, acting as a substitute for phosphorus plant sources.

show abstract

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

Cited by 13 publications

References 10 publications

Effect of ph and temperature on the activity of phytase products used in broiler nutrition

Effect of ph and temperature on the activity of phytase products used in broiler nutrition

Carcass characteristics of broilers at 42 days receiving diets with phytase in different energy and crude protein levels

Digestibility, Determination of Metabolizable Energy and Bone Mineralization of Broilers Fed with Nutritionally Valued Phytase

Contact Info

Product

Resources

About