Dose-dependent effects of a microbial phytase on phosphorus digestibility of common feedstuffs in pigs
Objective The objective of this study was to evaluate increasing doses of a novel microbial phytase (Cibenza Phytaverse, Novus International, St. Charles, MO, USA) on standardized total tract digestibility (STTD) of P in canola meal (CM), corn, corn-derived distiller’s dried grains with solubles (DD...
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Asian-Australasian Association of Animal Production Societies
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doaj-631007dd0c084c08b13a23d8031a873a2020-11-25T01:44:03ZengAsian-Australasian Association of Animal Production SocietiesAsian-Australasian Journal of Animal Sciences1011-23671976-55172017-07-0130798599310.5713/ajas.16.089423691Dose-dependent effects of a microbial phytase on phosphorus digestibility of common feedstuffs in pigsFerdinando N. Almeida0Mercedes Vazquez-Añón1Jeffery Escobar2 Novus International, Inc. St. Charles, MO, 63304, USA Novus International, Inc. St. Charles, MO, 63304, USA Elanco Animal Health, Greenfield, IN 46140, USAObjective The objective of this study was to evaluate increasing doses of a novel microbial phytase (Cibenza Phytaverse, Novus International, St. Charles, MO, USA) on standardized total tract digestibility (STTD) of P in canola meal (CM), corn, corn-derived distiller’s dried grains with solubles (DDGS), rice bran (RB), sorghum, soybean meal (SBM), sunflower meal (SFM), and wheat. Methods Two cohorts of 36 pigs each (initial body weight = 78.5±3.7 kg) were randomly assigned to 2 rooms, each housing 36 pigs, and then allotted to 6 diets with 6 replicates per diet in a randomized complete block design. Test ingredient was the only dietary source of P and diets contained 6 concentrations of phytase (0, 125, 250, 500, 1,000, or 2,000 phytase units [FTU]/kg) with 0.4% of TiO2 as a digestibility marker. Feeding schedule for each ingredient was 5 d acclimation, 5 d fecal collection, and 4 d washout. The STTD of P increased (linear or exponential p≤0.001) with the inclusion of phytase for all ingredients. Results Basal STTD of P was 37.6% for CM, 37.6% for corn, 68.6% for DDGS, 10.3% for RB, 41.2% for sorghum, 36.7% for SBM, 26.2% for SFM, and 55.1% for wheat. The efficiency of this novel phytase to hydrolyze phytate is best described with a broken-line model for corn, an exponential model for CM, RB, SBM, SFM, and wheat, and a linear model for DDGS and sorghum. Based on best-fit model the phytase dose (FTU/kg) needed for highest STTD of P (%), respectively, was 735 for 64.3% in CM, 550 for 69.4% in corn, 160 for 55.5% in SBM, 1,219 for 57.8% in SFM, and 881 for 64.0% in wheat, whereas a maximum response was not obtained for sorghum, DDGS and RB within the evaluated phytase range of 0 to 2,000 FTU/kg. These differences in the phytase concentration needed to maximize the STTD of P clearly indicate that the enzyme does not have the same hydrolysis efficiency among the evaluated ingredients. Conclusion Variations in enzyme efficacy to release P from phytate in various feedstuffs need to be taken into consideration when determining the matrix value for phytase in a mixed diet, which likely depends on the type and inclusion concentration of ingredients used in mixed diets for pigs. The use of a fixed P matrix value across different diet types for a given phytase concentration is discouraged as it may result in inaccurate diet formulation.http://www.ajas.info/upload/pdf/ajas-30-7-985.pdfDigestibilityIngredientsPigPhosphorusPhytase |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ferdinando N. Almeida Mercedes Vazquez-Añón Jeffery Escobar |
spellingShingle |
Ferdinando N. Almeida Mercedes Vazquez-Añón Jeffery Escobar Dose-dependent effects of a microbial phytase on phosphorus digestibility of common feedstuffs in pigs Asian-Australasian Journal of Animal Sciences Digestibility Ingredients Pig Phosphorus Phytase |
author_facet |
Ferdinando N. Almeida Mercedes Vazquez-Añón Jeffery Escobar |
author_sort |
Ferdinando N. Almeida |
title |
Dose-dependent effects of a microbial phytase on phosphorus digestibility of common feedstuffs in pigs |
title_short |
Dose-dependent effects of a microbial phytase on phosphorus digestibility of common feedstuffs in pigs |
title_full |
Dose-dependent effects of a microbial phytase on phosphorus digestibility of common feedstuffs in pigs |
title_fullStr |
Dose-dependent effects of a microbial phytase on phosphorus digestibility of common feedstuffs in pigs |
title_full_unstemmed |
Dose-dependent effects of a microbial phytase on phosphorus digestibility of common feedstuffs in pigs |
title_sort |
dose-dependent effects of a microbial phytase on phosphorus digestibility of common feedstuffs in pigs |
publisher |
Asian-Australasian Association of Animal Production Societies |
series |
Asian-Australasian Journal of Animal Sciences |
issn |
1011-2367 1976-5517 |
publishDate |
2017-07-01 |
description |
Objective The objective of this study was to evaluate increasing doses of a novel microbial phytase (Cibenza Phytaverse, Novus International, St. Charles, MO, USA) on standardized total tract digestibility (STTD) of P in canola meal (CM), corn, corn-derived distiller’s dried grains with solubles (DDGS), rice bran (RB), sorghum, soybean meal (SBM), sunflower meal (SFM), and wheat. Methods Two cohorts of 36 pigs each (initial body weight = 78.5±3.7 kg) were randomly assigned to 2 rooms, each housing 36 pigs, and then allotted to 6 diets with 6 replicates per diet in a randomized complete block design. Test ingredient was the only dietary source of P and diets contained 6 concentrations of phytase (0, 125, 250, 500, 1,000, or 2,000 phytase units [FTU]/kg) with 0.4% of TiO2 as a digestibility marker. Feeding schedule for each ingredient was 5 d acclimation, 5 d fecal collection, and 4 d washout. The STTD of P increased (linear or exponential p≤0.001) with the inclusion of phytase for all ingredients. Results Basal STTD of P was 37.6% for CM, 37.6% for corn, 68.6% for DDGS, 10.3% for RB, 41.2% for sorghum, 36.7% for SBM, 26.2% for SFM, and 55.1% for wheat. The efficiency of this novel phytase to hydrolyze phytate is best described with a broken-line model for corn, an exponential model for CM, RB, SBM, SFM, and wheat, and a linear model for DDGS and sorghum. Based on best-fit model the phytase dose (FTU/kg) needed for highest STTD of P (%), respectively, was 735 for 64.3% in CM, 550 for 69.4% in corn, 160 for 55.5% in SBM, 1,219 for 57.8% in SFM, and 881 for 64.0% in wheat, whereas a maximum response was not obtained for sorghum, DDGS and RB within the evaluated phytase range of 0 to 2,000 FTU/kg. These differences in the phytase concentration needed to maximize the STTD of P clearly indicate that the enzyme does not have the same hydrolysis efficiency among the evaluated ingredients. Conclusion Variations in enzyme efficacy to release P from phytate in various feedstuffs need to be taken into consideration when determining the matrix value for phytase in a mixed diet, which likely depends on the type and inclusion concentration of ingredients used in mixed diets for pigs. The use of a fixed P matrix value across different diet types for a given phytase concentration is discouraged as it may result in inaccurate diet formulation. |
topic |
Digestibility Ingredients Pig Phosphorus Phytase |
url |
http://www.ajas.info/upload/pdf/ajas-30-7-985.pdf |
work_keys_str_mv |
AT ferdinandonalmeida dosedependenteffectsofamicrobialphytaseonphosphorusdigestibilityofcommonfeedstuffsinpigs AT mercedesvazquezanon dosedependenteffectsofamicrobialphytaseonphosphorusdigestibilityofcommonfeedstuffsinpigs AT jefferyescobar dosedependenteffectsofamicrobialphytaseonphosphorusdigestibilityofcommonfeedstuffsinpigs |
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