Effect of superdosing phytase on productive performance and egg quality in laying hens

Kim, Jong Hyuk; Pitargue, Franco Martinez; Jung, Hyun-Jung; Han, Gi Ppeum; Choi, Hyeon Seok; Kil, Dong Yong

doi:10.5713/ajas.17.0149

Cited by 32 publications

(33 citation statements)

References 18 publications

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“…The signi-ficant effect of phytase supplementation on FCR in the present study is in agreement with those of Liebert et al [21], concluding that enzyme supplementation to the corn-SBM diet improves FCR in laying hens. Recently, Kim et al [22] suggested that beneficial effects of phytase has been associated with more liberated available phosphorus from phytate-phosphorus, which can decrease its anti-nutritional effect and can generate myoinositol showing vitamin like or lipotropic effects. This increased utilization of phytate-phosphorus may further improve the utilization of energy and other nutrients such as amino acids and minerals in diets, which is known as an extra-phosphoric effect of phytase [23].…”

Section: Discussionmentioning

confidence: 99%

Effect of dietary sesame (Sesame indicum L) seed meal level supplemented with lysine and phytase on performance traits and antioxidant status of late-phase laying hens

Baghban-Kanani

Hosseintabar-Ghasemabad

Azimi-Youvalari

et al. 2020

Asian-Australas J Anim Sci

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Objective: This study was performed to investigate the effects of supplementing sesame seed meal (SSM) with phytase and lysine on performance, egg quality, blood biochemical and antioxidant status of laying hens. Methods: A total of 960, 56-wk-old laying hens were divided into 12 dietary groups with eight replicates per group (10 birds per replicate). A completely randomized design with factorial arrangement 2×3×2 consisted of two levels of lysine supplement (0% and 10% over requirement), three SSM levels (0%, 10%, and 20%) with or without phytase (0 and 300 g/ton). The feeding trial lasted 10 weeks. Results: Birds fed diets with 10% SSM had higher feed intake than groups fed 0% and 20% SSM. The addition of phytase to experimental feeds, improved feed conversion ratio, increased egg weight and mass (p<0.01). Egg quality criteria was not affected by supplementing phytase; however, supplementing 300 g/ton phytase to hens diet, led to a significant (p<0.05) increase in egg shell strength. Egg yolk cholesterol and serum low-density lipoprotein cholesterol, atherogenic index and total cholesterol were decreased (p<0.01) by diet containing 20% SSM. The high-density lipoprotein cholesterol was increased (p<0.05) in serum of hens fed 20% SSM than the other groups. It was also observed that total antioxidant capacity and total superoxide dismutase content of hens fed 20% SSM was significantly higher than control group (p<0.05). Conclusion: As from results, dietary supplementation of SSM and phytase had no negative effects on laying hens performance or egg quality while improving the egg oxidative stability.

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Section: Discussionmentioning

confidence: 99%

Effect of dietary sesame (Sesame indicum L) seed meal level supplemented with lysine and phytase on performance traits and antioxidant status of late-phase laying hens

Baghban-Kanani

Hosseintabar-Ghasemabad

Azimi-Youvalari

et al. 2020

Asian-Australas J Anim Sci

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“…Ten times higher dietary supplementation of Ph, in comparison to the amount used in our experiment, did not influence egg production, egg weight, feed intake or ash percentage in the tibia. In addition, Kim et al (2017) applied diets with unchanged Ca (39.1 g/kg) and NPP (2.6 g/kg) contents. These authors tested dietary supplements of 1000, 2000, and 3000 FTU/kg.…”

Section: Discussionmentioning

confidence: 99%

“…Meyer and Parsons (2011) added 6-phytase OptiPhos ® at 0, 150, 250, and 15 000 FTU/kg to feed mixtures for laying hens; these additions contained 38 g/kg Ca and 1.05 g/kg nonphytate phosphorus (NPP). The effect of superdosing of Phyzyme XP, at 10 000-30 000 FTU/kg, on the productive performance of laying hens was observed by Kim et al (2017). The concentration of Ca in all dietary treatments was 39.1 g/kg, and the NPP concentration in experimental treatments was 2.6 g/kg.…”

mentioning

confidence: 95%

Negative effect of phytase superdosing in laying hens

Skřivan¹,

Englmaierová²,

Skřivanová³

2018

CZECH J ANIM SCI

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Skřivan M., Englmaierová M., Skřivanová V. (2018): Negative effect of phytase superdosing in laying hens. Czech J. Anim. Sci., 63, 182-187.Hisex hens, aged 24 weeks, were divided into 6 groups. Each group consisted of 4 cages with 10 hens per cage with dimensions and equipment meeting the EU directives. This 2 × 3 factorial experiment included two levels of calcium (Ca; 35 or 42 g/kg) and 3 different additions of 6-phytase OptiPhos ® (Ph; 0, 300, and 1500 phytase units (FTU)/kg) to the diet. The content of nonphytate phosphorus (NPP) in all diets was the same (1.8 g/kg). The experiment lasted 12 weeks. A significant interaction of Ph × Ca (P = 0.029) was observed in hen-day egg production. A diet with 35 g/kg Ca and the highest dose of Ph (1500 FTU/kg) resulted in a lower hen-day egg production (84.1%) than did the other treatments (91.5-88.6%). Phytase superdosing negatively influenced egg mass production (P = 0.001) and the feed conversion ratio (P = 0.018). Neither Ph nor Ca influenced eggshell ash content. Both additions of Ph into mixed feed decreased Haugh units (P < 0.001). A higher content of Ca in the diet increased shell thickness (P = 0.024) and shell breaking strength (P = 0.039), while Ph addition increased shell percentage (P = 0.004) and shell breaking strength (P = 0.009). The results of this experiment demonstrate the unsuitability of Ph superdosing in mixed feed for laying hens.

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“…Initial body weight (BW), final BW, BW gain, hen-day egg production, egg weight, egg mass, FI, and feed conversion ratio (FCR) were recorded and calculated [20]. The data for productive performance were summarized on 4 wk.…”

Section: Methodsmentioning

confidence: 99%

Effect of different sources and inclusion levels of dietary fat on productive performance and egg quality in laying hens raised under hot environmental conditions

Kim

Lee

Yang

et al. 2019

Asian-Australas J Anim Sci

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Objective This experiment aimed to investigate the effect of different sources and inclusion levels of dietary fat on productive performance and egg quality in laying hens raised under hot environmental conditions. Methods A total of 480 Hy-Line Brown laying hens at 31 wk of age were randomly allotted to 1 of 5 experimental diets. The control diet contained 2,800 kcal/kg nitrogen-corrected apparent metabolizable energy with no fat addition. Four additional diets were prepared by adding 2.0% or 4.0% of animal fat (AF) or soybean oil (SO). Energy and nutrient concentrations were consistent among all diets. Diets were fed to hens for 4 weeks. Average daily room temperature and humidity were 26.7°C±1.52°C and 77.4%±4.50%. The heat stress index was approximately 76, indicating that hens were raised under heat stress conditions. Results Final body weight (BW) was greater (p<0.05) for hens fed diets containing 2.0% or 4.0% AF than for those fed the control diet or diets containing 2.0% or 4.0% SO. The BW gain and feed intake were greater (p<0.05) for hens fed diets containing additional AF or SO than those fed the control diet. Eggshell thickness was the greatest (p<0.05) for hens fed the control diet, but the least (p<0.05) for hens fed diets containing 4.0% SO. Egg yolk color was the greatest (p<0.05) for hens fed the control diet, but the least (p<0.05) for hens fed diets containing 4.0% SO. Conclusion Inclusion of supplemental fat (AF and SO) in diets exhibits preventative effects on BW loss for hens raised under hot environmental conditions when energy and nutrient concentrations in diets were maintained. The effects were greater for AF than for SO. However, inclusion of supplemental fat in diets decreases eggshell thickness and egg yolk yellowness, possibly due to a reduction in Ca absorption and intake of egg yolk colorants.

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Effect of superdosing phytase on productive performance and egg quality in laying hens

Cited by 32 publications

References 18 publications

Effect of dietary sesame (Sesame indicum L) seed meal level supplemented with lysine and phytase on performance traits and antioxidant status of late-phase laying hens

Effect of dietary sesame (Sesame indicum L) seed meal level supplemented with lysine and phytase on performance traits and antioxidant status of late-phase laying hens

Negative effect of phytase superdosing in laying hens

Effect of different sources and inclusion levels of dietary fat on productive performance and egg quality in laying hens raised under hot environmental conditions

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