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Full matrix values for phytase?
A recent article (https://www.poultryworld.net/specials/benefits-of-using-full-matrix-values-for-phytase/) mentions the potential benefits of using full matrix values for a phytase in broilers. This means is using calcium (Ca), phosphorus (P), sodium (Na), metabolizable energy (ME), and digestible amino acid (AA) values. Phytase is an enzyme that can directly release P from phytate, which is the main form of P found in plant ingredients. However, in the stichometry of this reaction there is not Ca, Na, ME, or AA. So where are these values coming from? How is a phytase able to provide Ca, Na, ME, or AA of nutritional value?
Can the full value of a phytase be added to the full value of other enzyme(s)?
The article describes the combination of phytase with xylanase, amylase, and protease. Results indicate no additional increase in body weight gain with the addition of the xylanase, amylase, and protease; no data was provided for FCR of efficiency broiler index.
How are you using phytase matrix values in your diets?
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16 Replies
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Does Phytase requires enzymes to be properly broken down and utilized
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Full matrix values of phytase and other enzymes (e.g., xylanase, amylase, protease) shouldn’t simply be added due to potential overlaps or substrate competition. Use adjusted values based on trials
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👍
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Thank you for sharing your knowledge and expertise with us.
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Well appreciated
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Thanks
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An additive effect is more likely between two unrelated enzymes. However, some studies are confounded without suitable negative controls and treatme
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Phytases differ from each other in terms of mode of action, stability, optimum pH, and optimum temperature.
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Phytase matrix values are used in feed formulation to account for the nutrients that become more bioavailable due to the enzyme’s action.
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Additionally , using the full matrix values for phytase and other enzymes can lead to production benefits, reduce feed costs, and contribute to sustainable broiler production
When using enzymes in combination you have to consider
1. additive effects – Carbohydrases, such as xylanase and β-glucanase, are often used in combination with phytase to maximize nutrient availability and utilization from feed.
2.carbohydrases – The matrix of both enzymes can be reduced in broilers’ diet
3. matrix of both enzymes – Phytases differ from each other in terms of mode of action, stability, optimum pH, and optimum temperature
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Yes, the full value of a phytase can be added to the full value of other enzymes when using the proper enzyme mixture and dose levels
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The full matrix value of an enzyme CANNOT be added to the full matrix value of another enzyme because some of the nutritional values of enzymes are due to “sparing” some nutrients and not because they increase the digestibility or release of those nutrients. This highlights the importance of knowing and understanding the stoichiometry of enzymatic reactions to understand the direct and indirect effects of feed enzymes.
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Thank you for the correction Dr Jeffrey
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Thanks
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Phytase mainly used as a dietary supplement for poultry.
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Thanks for sharing information with us.
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