Performance and bone quality of broilers fed diets containing different levels of phosphorus and supplemented with phytase
Background: Although phytase has been widely used in poultry nutrition, the effects of the enzyme on broilers fed low levels of phosphorus are poorly understood. Objective: To evaluate the effects of two commercial phytases on live performance and bone quality of broilers fed diets with normal and r...
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| Format: | Article |
| Language: | English |
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Universidad de Antioquia
2022-05-01
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| Series: | Revista Colombiana de Ciencias Pecuarias |
| Subjects: | |
| Online Access: | https://revistas.udea.edu.co/index.php/rccp/article/view/349839 |
| _version_ | 1797384724823408640 |
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| author | Mariana M Saldanha Luiz F P Pereira Anna R C Abreu Fernanda L S Castro Winnie L S Clímaco Itallo C S Araújo Leonardo J C Lara |
| author_facet | Mariana M Saldanha Luiz F P Pereira Anna R C Abreu Fernanda L S Castro Winnie L S Clímaco Itallo C S Araújo Leonardo J C Lara |
| author_sort | Mariana M Saldanha |
| collection | DOAJ |
| description | Background: Although phytase has been widely used in poultry nutrition, the effects of the enzyme on broilers fed low levels of phosphorus are poorly understood. Objective: To evaluate the effects of two commercial phytases on live performance and bone quality of broilers fed diets with normal and reduced levels of phosphorus. Methods: Two experiments were conducted with four treatments and six repetitions with 30 birds each, for a total of 24 groups. The first experiment (Exp. I) used a reference level of available phosphorus (AP) with four treatments, as follows: Positive control= 0.45% AP starter diet/0.40% AP grower diet without phytase; Phytase X= 0.35% AP starter diet/0.30% AP grower diet + Phytase X; Phytase Y= 0.35% AP starter diet/0.30% AP grower diet + Phytase Y; and Negative control= 0.35% AP starter diet/0.30% AP grower diet, without phytase. In experiment II (Exp. II) the same treatments were used, but AP levels were reduced by 0.10%. The variables analyzed were: performance from one to 35 days, and bone quality at 35 days of age. Both experiments were analyzed using a completely randomized design. Results: In Exp. I, the positive control resulted in greater body weight gain (2,558 g; p<0,05) compared to Phytase Y (2,470 g) and negative control (2,472 g), and better feed conversion ratio (1.48; p<0,05) than the negative control (1.51). However, when phosphorus was reduced in Exp. II, the positive control and treatments with Phytase X showed better results (p<0.01) for feed intake (3,608 g and 3,593 g, respectively) and weight gain (2,430 g and 2,400 g, respectively) compared to the negative control (2,889 g of feed intake and 1,915 g of weight gain; p<0.01), which also presented low bone ash (36.8%) and phosphorus in the tibia (5.48%; p<0.01). Conclusion: Reducing AP concentration in diets not added with phytase negatively affects weight gain and feed intake of broilers. |
| first_indexed | 2024-03-08T21:39:45Z |
| format | Article |
| id | doaj.art-17a7565b3d3940358c0c21822d494aec |
| institution | Directory Open Access Journal |
| issn | 2256-2958 |
| language | English |
| last_indexed | 2024-03-08T21:39:45Z |
| publishDate | 2022-05-01 |
| publisher | Universidad de Antioquia |
| record_format | Article |
| series | Revista Colombiana de Ciencias Pecuarias |
| spelling | doaj.art-17a7565b3d3940358c0c21822d494aec2023-12-20T13:52:01ZengUniversidad de AntioquiaRevista Colombiana de Ciencias Pecuarias2256-29582022-05-01362667910.17533/udea.rccp.v36n2a267610Performance and bone quality of broilers fed diets containing different levels of phosphorus and supplemented with phytaseMariana M Saldanha0Luiz F P Pereira1Anna R C Abreu2Fernanda L S Castro3Winnie L S Clímaco4Itallo C S Araújo5Leonardo J C Lara6Universidade Federal Rural da AmazôniaUniversidade Federal de Minas GeraisUniversidade Federal de Minas GeraisUniversidade Federal de Minas GeraisUniversidade Federal de Minas GeraisUniversidade Federal de Minas GeraisUniversidade Federal de Minas GeraisBackground: Although phytase has been widely used in poultry nutrition, the effects of the enzyme on broilers fed low levels of phosphorus are poorly understood. Objective: To evaluate the effects of two commercial phytases on live performance and bone quality of broilers fed diets with normal and reduced levels of phosphorus. Methods: Two experiments were conducted with four treatments and six repetitions with 30 birds each, for a total of 24 groups. The first experiment (Exp. I) used a reference level of available phosphorus (AP) with four treatments, as follows: Positive control= 0.45% AP starter diet/0.40% AP grower diet without phytase; Phytase X= 0.35% AP starter diet/0.30% AP grower diet + Phytase X; Phytase Y= 0.35% AP starter diet/0.30% AP grower diet + Phytase Y; and Negative control= 0.35% AP starter diet/0.30% AP grower diet, without phytase. In experiment II (Exp. II) the same treatments were used, but AP levels were reduced by 0.10%. The variables analyzed were: performance from one to 35 days, and bone quality at 35 days of age. Both experiments were analyzed using a completely randomized design. Results: In Exp. I, the positive control resulted in greater body weight gain (2,558 g; p<0,05) compared to Phytase Y (2,470 g) and negative control (2,472 g), and better feed conversion ratio (1.48; p<0,05) than the negative control (1.51). However, when phosphorus was reduced in Exp. II, the positive control and treatments with Phytase X showed better results (p<0.01) for feed intake (3,608 g and 3,593 g, respectively) and weight gain (2,430 g and 2,400 g, respectively) compared to the negative control (2,889 g of feed intake and 1,915 g of weight gain; p<0.01), which also presented low bone ash (36.8%) and phosphorus in the tibia (5.48%; p<0.01). Conclusion: Reducing AP concentration in diets not added with phytase negatively affects weight gain and feed intake of broilers.https://revistas.udea.edu.co/index.php/rccp/article/view/349839available phosphorusbone healthbroilerexogenous enzymesfeed conversionweight gaingrowth performancelow phosphorus dietmineralnutritionphytasepoultry |
| spellingShingle | Mariana M Saldanha Luiz F P Pereira Anna R C Abreu Fernanda L S Castro Winnie L S Clímaco Itallo C S Araújo Leonardo J C Lara Performance and bone quality of broilers fed diets containing different levels of phosphorus and supplemented with phytase Revista Colombiana de Ciencias Pecuarias available phosphorus bone health broiler exogenous enzymes feed conversion weight gain growth performance low phosphorus diet mineral nutrition phytase poultry |
| title | Performance and bone quality of broilers fed diets containing different levels of phosphorus and supplemented with phytase |
| title_full | Performance and bone quality of broilers fed diets containing different levels of phosphorus and supplemented with phytase |
| title_fullStr | Performance and bone quality of broilers fed diets containing different levels of phosphorus and supplemented with phytase |
| title_full_unstemmed | Performance and bone quality of broilers fed diets containing different levels of phosphorus and supplemented with phytase |
| title_short | Performance and bone quality of broilers fed diets containing different levels of phosphorus and supplemented with phytase |
| title_sort | performance and bone quality of broilers fed diets containing different levels of phosphorus and supplemented with phytase |
| topic | available phosphorus bone health broiler exogenous enzymes feed conversion weight gain growth performance low phosphorus diet mineral nutrition phytase poultry |
| url | https://revistas.udea.edu.co/index.php/rccp/article/view/349839 |
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