Effects of Phytase Superdosing on Digestibility and Bone Integrity of Broilers

Fernandes, Jovanir Inês Müller; Horn, D.; Ronconi, Eleusis; Buzim, R.; Lima, Fernanda Kaiser de; Pazdiora, DA

doi:10.3382/japr/pfz001

Cited by 23 publications

(8 citation statements)

References 16 publications

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“…Improvements to bone strength parameters including increased tibia ash, increased BMD and BMC and increased breaking strength as a result of the inclusion of phytase, have been commonly reported in the available literature [12,22,23,60]. However, the current study found no differences in the tibia bone strength parameters measured.…”

Section: Bone Strength and Body Compositioncontrasting

confidence: 54%

“…In other work, increasing the amount of additional phytase to broiler diets from 0, 500, 1000 and 2000 to 4000 FTU/kg resulted in a quadratic increase in body weight, feed intake, tibia ash and a linear increase in the digestibility of energy and all amino acids. Furthermore, increasing phytase from 0 to 4000 FTU/kg phytase improved the ileal digestibility of P and Ca by 88 and 18%, respectively [21], and more evidence shows that phytase superdosing improves bone development [22], with Walk et al [23] reporting increased growth performance, increased tibia ash and as well as reduced phytate concentration in the gizzard of birds offered the higher levels of phytase (1500 FTU/kg). These findings have been reiterated by the work of others [6,8,12,[22][23][24][25] all of which have reported additional beneficial effects to superdosing.…”

Section: Introductionmentioning

confidence: 98%

“…Furthermore, increasing phytase from 0 to 4000 FTU/kg phytase improved the ileal digestibility of P and Ca by 88 and 18%, respectively [21], and more evidence shows that phytase superdosing improves bone development [22], with Walk et al [23] reporting increased growth performance, increased tibia ash and as well as reduced phytate concentration in the gizzard of birds offered the higher levels of phytase (1500 FTU/kg). These findings have been reiterated by the work of others [6,8,12,[22][23][24][25] all of which have reported additional beneficial effects to superdosing. There is also evidence to suggest that phytase superdosing can alter the morphology of the intestine, e.g., increased villi height and villi height to crypt depth ratio (VH:CD) [26,27] and the gut microbiota by increasing beneficial bacteria, e.g., Lactobacillus, while reducing harmful bacteria [27,28], ultimately improving broiler gut health and facilitating the improved absorption of nutrients.…”

Section: Introductionmentioning

confidence: 98%

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The Growth Performance, Nutrient Digestibility, Gut Bacteria and Bone Strength of Broilers Offered Alternative, Sustainable Diets Varying in Nutrient Specification and Phytase Dose

Mulvenna

McCormack

Magowan

et al. 2022

Animals

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This study assessed the use of locally sourced sustainable feed ingredients, rapeseed meal (RSM) and maize dried distiller grains with solubles (DDGS) in diets over traditional ingredients on the growth performance, bone strength and nutrient digestibility of broilers. This work also investigated the effects of supplementing exogenous phytase in two doses (500 vs. 1500 FTU/kg). Using male Ross 308 chicks (n = 320) assigned to receive one of four experimental diets: (1) Positive control diet 1 (PC1), a wheat, soya-based diet + 500 FTU/kg phytase. (2) Positive control diet 2, RSM/DDGS diet + 500 FTU/kg phytase (PC2). (3) Negative control (NC) reduced nutrient RSM/DDGS diet, no phytase. (4) The NC diet plus 1500 FTU/kg phytase (NC+). PC1 birds displayed higher feed intake and body weight gain consistently throughout the trial (p < 0.001) as well as increased body weight by 28 d and 42 d (p < 0.001). Whole-body dual emission X-ray absorptiometry (DXA) analysis revealed PC1 birds also had higher bone mineral density (BMD), bone mineral content (BMC), total bone mass, total lean mass and total fat mass than birds offered other treatments (p < 0.01). Diet had no significant effect on bone strength. Phytase superdosing improved the digestibility of dry matter (DM), neutral detergent fibre (NDF), gross energy (GE), calcium (Ca), potassium (K) and magnesium (Mg) compared to birds in other treatment groups. The phytase superdose also improved performance in comparison to birds offered the NC diet. Phytase superdosing increased the IP6 and IP5 degradation and increased the ileal inositol concentration of the birds. N excretion was lower for birds offered the traditional wheat–soya diet and highest for those offered the high-specification RSM/DDGS diet with a commercial dose of phytase. The addition of a phytase superdose to the negative control diet (NC+) reduced P excretion of birds by 15% compared to birds offered NC.

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Section: Bone Strength and Body Compositioncontrasting

confidence: 54%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

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The Growth Performance, Nutrient Digestibility, Gut Bacteria and Bone Strength of Broilers Offered Alternative, Sustainable Diets Varying in Nutrient Specification and Phytase Dose

Mulvenna

McCormack

Magowan

et al. 2022

Animals

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“…Rations supplemented with phytase enhanced ileum P digestibility (65.87%) when provided to low Ca: available P. Srikanthithasan et al (2020) illustrated that tibia length of birds fed high or low levels of phytase were higher than those of broilers fed control (without phytase). Fernandes et al (2019) showed that linear effect with inclusion of phytase was observed. The highest values of both Ca and P deposited in tibia were revealed by phytase high level which reflected on tibia resistance and great breaking strength values.…”

Section: Introductionmentioning

confidence: 95%

Response of Broiler Chicks to Microbial Phytase Supplementation as Influenced by Dietary Calcium and Phosphorus Levels: 2- Bone Parameters and Nutrient Excretion and Retention

Tammam,

Abou Elenin

2023

Egyptian Journal of Nutrition and Feeds

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n experiment was conducted to determine and compare the differences in some bone parameters and nutrient excretion and retention of broiler chicks fed 6 different dietary calcium (Ca) and phosphorus (P) levels with or without phytase in factorial design (6×2). A total of 360 one day-old Cobb 500 broiler were assigned to 12 dietary treatments with 3 replicates cages of 10 birds each in factorial design with 6 dietary calcium and Phosphorus levels with or without phytase. Mash diets were corn and soybean-meal based and fed ad-libitum up to 42 days of age. At the end of experiment 6 birds per treatments were slaughtered, lift tibia excised and tibia parameters, (tibia length, width, breaking strength, seedor index, ash%, Ca% and P%) were measurements. The mineral content of calcium and phosphors in feed and excreta were determined and retention of mineral was calculated. The results indicated that: •Different dietary treatments and adding phytase failed to be significant effect on all tibia measurements except tibia breaking strength. •Different dietary treatments and adding phytase had significant effects on tibia ash% • Tibia Ca and P percentages significant affected by dietary treatments • Ca and P execration and retention significantly affected by different dietary treatmentsIn conclusion, decreasing Ca and P% in the treatments diets didn't affected tibia measurements except tibia breathing strength and decreasing percentages of Ca and P excretion either with or without phytase which retention on enhancement Ca and P retention values.

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“…Also, the tibia was taller for birds fed high phytase than those of birds fed low level phytase on day 35. Fernandes et al (2019) showed that linear effect with inclusion of phytase was observed. The highest values of both Ca and P deposited in tibia were revealed by phytase high level, which reflected on tibia resistance and great breaking strength values.…”

Section: Introductionmentioning

confidence: 95%

The Effect of Phosphorus Levels and Phytase Supplementation on Growth Performance, Bone Quality and Carcass Traits in Broiler Chickens

Shabban

Azeem

Thabet

et al. 2021

Egyptian Journal of Nutrition and Feeds

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he aim of this study was to evaluate the effect of adding phytase enzyme in broiler diet with optimized nutrients content (standard) or with calcium and phosphorus deficiency on growth performance, bone quality, Carcass traits and economic efficiency. Total numbers of 180 one-day old broiler chicks of Cobb 500 were randomly distributed into 6 treatments with 10 chicks per replicate and 3 replicate per treatment. Chicks fed on 3 starter (0-21 d) and 3 grower diets (100, 75 and 50%) of calcium and phosphorus requirements according to the guidebook off Cobb 500 broilers. All the diets were without or with adding commercial and enzymatic product (phytase, 550 FTU) per kg diet. The main results obtained can be summarized as follows: There were insignificant difference in body weight, body weight gain, feed consumption and feed conversion between chicks fed different levels of calcium and phosphate with or without enzyme supplementation.Carcass traits (dressing percentage and ready to cook) were non-significantly different for all treatment groups except giblets percentage, liver percentage, gizzard percentage and heart percentage were significantly affected by calcium and phosphorus levels. In the same manner, tibia length tibia width and tibia seedor index weren't significantly affected by treatments. Whereas, tibia-brokering stress was significantly reduced only with chicks 100/50% diet and chicks fed (100/100%) diet give the significantly higher figure. Results of economic evaluation showed that supplementation phytase enzyme (100/75) calcium and phosphorus in broiler diet support and enhance economic efficiency.In conclusion, it could be recommended that using of (100/75) as a level of calcium and phosphorus according to the guidebook of Cobb 500 broiler diet with phytase enzyme could keep better utilization of both calcium and phosphorus to maintain performance, carcass and tibia as well as enhance economic efficiency.

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Effects of Phytase Superdosing on Digestibility and Bone Integrity of Broilers

Cited by 23 publications

References 16 publications

The Growth Performance, Nutrient Digestibility, Gut Bacteria and Bone Strength of Broilers Offered Alternative, Sustainable Diets Varying in Nutrient Specification and Phytase Dose

The Growth Performance, Nutrient Digestibility, Gut Bacteria and Bone Strength of Broilers Offered Alternative, Sustainable Diets Varying in Nutrient Specification and Phytase Dose

Response of Broiler Chicks to Microbial Phytase Supplementation as Influenced by Dietary Calcium and Phosphorus Levels: 2- Bone Parameters and Nutrient Excretion and Retention

The Effect of Phosphorus Levels and Phytase Supplementation on Growth Performance, Bone Quality and Carcass Traits in Broiler Chickens

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