Efeito da suplementação de enzima fitase sobre o metabolismo de nutrientes e o desempenho de poedeiras

Viana, Maurício Tárcio dos Santos; Albino, Luiz Fernando Teixeira; Rostagno, Horácio Santiago; Barreto, Sergio Luiz de Toledo; Silva, Eliane Aparecida da; Florentino, Wenderson Magno

doi:10.1590/s1516-35982009000600015

Cited by 14 publications

(10 citation statements)

References 13 publications

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“…In the present reseach, unlike egg production, egg weight remained unchanged when phytase was added or even when dLys content varied F 12,169 = 1.44, p = 0.15, although both factors have been stated to positively influence egg weight. 29,31 Only, egg weight was higher in hens fed the phytase-free diet containing 0.25 % avP than the average of those fed diets with 0.12 % avP F 12,169 = 3.70, p = 0.06, as also reported by Ceylan et al 32 and Englmaierová et al 33 , but in contrast from studies by Augspurger et al, 34 Lim et al, 21 and Viana et al 35 ( Table 3).…”

Section: Resultssupporting

confidence: 63%

Effect of phytase dose on productive performance and bone status of layers fed with graded levels of digestible lysine

et al. 2018

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Exogenous phytase could influence dietary protein availability by variation in using dose. The objective of the present study was to determine if incremental dosing of an evolved E.coli 6-phytase would lead to improvements in lysine availability through evaluating performance and bone status in Bovans White layers. A total of 182 layers were placed in individual cages and distributed to 13 treatments: a 3×4 factorial arrangement with three levels of digestible lysine (dLys - 0.67, 0.77, and 0.87 %) and four doses of phytase (0, 300, 1 200, and 4 800 FTU/kg) in 0.12 % available P (avP) diets. Additionally, one phytase-free control treatment was included with 0.25 % avP and 0.87 % dLys. Productive parameters were recorded for 25 weeks, from 39 week-old. At the end, abdominal fat deposition and the tibia were sampled; in bone was determined breaking strength and bone ash. Layers fed 1 200 FTU/kg phytase increased egg production percentage (F3,169 = 2.01, p = 0.019), abdominal fat deposition (F3,169 = 2.52, p = 0.059), bone breaking strength (F3,169 = 4.29, p = 0.006) and bone ash weight (F3,169 = 3.62, p = 0.015) compared with non-phytase inclusion. Furthermore, 1 200 FTU/kg phytase decreased incidence of broken eggs and soft-shell eggs (F3,169 = 2.9, p = 0.037). Phytase and dLys levels influenced egg mass and bone ash concentration (F12,169 = 1.86, p = 0.043). FCR and body weight loss was reduced with phytase inclusion (respectively: F12,169 = 2.43, p = 0.045, and F12,169 = 2.24, p = 0.001). Phytase-free control diet increased egg weight (F12,169 = 3.70, p < 0.068), but gave greater BW loss (F12,169 = 17.79, p < 0.001), less abdominal fat content (F12,169 = 5.85, p < 0.017), and no effect on other variables (p > 0.07). In conclusion, 1 200 FTU/kg of phytase improved productive performance and preserved body weight and bone status, without equivalence of phytase inclusion for dLys level, even with higher doses.Figure A. Response of egg marketable mass

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Section: Resultssupporting

confidence: 63%

Effect of phytase dose on productive performance and bone status of layers fed with graded levels of digestible lysine

et al. 2018

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“…Lan et al (2002), when analyzing the metabolizable energy content in the corn and soybean based feed supplemented with phytase enzyme (250-1000 uft kg -1 ) for Avian chickens in the initial and final phases, found higher values of apparent metabolizable energy when compared to a diet with normal levels of phosphorus and without enzyme supplementation. Dourado et al (2007) found that phytase provided the greatest increase in true metabolizable energy corrected for nitrogen balance (TMEn) of corn compared with other enzymes in broilers diets, in which we observed improvement of 95 kcal kg-1 in TMEn adding phytase, while Viana et al (2009) studying laying hens, reported that the addition of enriched phytase provides increased metabolism of energy and energy corrected by nitrogen balance.…”

Section: Resultssupporting

confidence: 50%

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.

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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.

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“…Sunflower meal is rich in fiber and phytic acid, and therefore, a positive effect with the addition of the enzyme complex in the diets was expected; however, no such effect was verified in the present experiment. Liu et al (2007) and Viana et al (2009) also verified that the addition of phytase to diets with reduced nutrient levels did not improve egg production, egg weight, or feed conversion per dozen eggs of layers. The results of these authors were very similar to those found in the present study, where no influence of enzyme complex on those parameters were detected.…”

Section: Sunflower Meal and Supplementation Of An Enzyme Complex In Lmentioning

confidence: 77%

Sunflower Meal and Supplementation of an Enzyme Complex in Layer Diets

Araújo¹,

Albino²,

Rostagno³

et al. 2015

Rev. Bras. Cienc. Avic.

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Alternative feedstuffs, eggs quality, feed costs, poultry. ABSTRACTThe objective of this experiment was to evaluate the performance of 64-to 79-wk-old laying hens fed diets supplemented with an enzyme complex (EC) and containing increasing sunflower meal (SFM) levels. A total of 384 Hy-Line Brown layers were distributed according to a randomized block design in a 4 × 2 factorial arrangement (four levels of SFM, and inclusion or not of EC), with eight replicates of six birds each unit. The levels of SFM inclusion were 0, 8, 16 and 24%, utilized in two distinct diets. Diets were calculated to meet all the nutritional requirements of birds, except for the nutrients that would be made available by the nutritional matrix of the enzyme complex, with or without utilization of EC. The parameters analyzed were feed intake (g/bird/day), egg production (%/bird/day), egg weight, egg mass (g/ bird/day), feed conversion ratio per egg mass, feed conversion ratio per dozen eggs, body weight gain, egg components (yolk, albumen and eggshell) and the economic efficiency index (EEI). There was no interaction between EC addition and the SFM levels in the diet. The addition of EC in the diets of laying hens did not affect egg productive or components parameters. The increase in the SFM levels in the diet presented quadratic effect on egg production and feed conversion ratio per dozen eggs, with calculated optimal sunflower meal inclusion levels of 6.72% and 5.83%, respectively, for each parameter. The best economic efficiency per dozen eggs was obtained with the diet with 16.0% SFM and EC inclusion, whereas per egg mass with the diet with of 24.0% SFM and no EC addition.

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Efeito da suplementação de enzima fitase sobre o metabolismo de nutrientes e o desempenho de poedeiras

Cited by 14 publications

References 13 publications

Effect of phytase dose on productive performance and bone status of layers fed with graded levels of digestible lysine

Effect of phytase dose on productive performance and bone status of layers fed with graded levels of digestible lysine

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

Sunflower Meal and Supplementation of an Enzyme Complex in Layer Diets

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