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. 2022 Nov 28;12(23):3322. doi: 10.3390/ani12233322

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Changes in the average daily gain (ADG) of broiler chickens by 3- and 6-phytase supplementation among the studies displayed in Table 2 that showed changes in the ADG. The studies were selected from peer-reviewed literature available after 2000. The percentage of change refers to a statistically significant (p < 0.05) and tendency (0.05 ≤ p < 0.10) effects of phytase individually on the ADG reported from each respective study. The described effects were in comparison with treatments containing no phytase. The average changes in the ADG of broiler chickens by 3- and 6-phytase supplementation were calculated excluding the studies that showed no effect.