The Impact of Phytase and Different Levels of Supplemental Amino Acid Complexed Minerals in Diets of Older Laying Hens

Abstract

A study was conducted to evaluate the effects of different sources and levels of supplemental amino acid-complexed minerals (AACM), with and without enzyme phytase (EZ). A total of 512 Dekalb White laying hens at 67 weeks of age were used in a 2 × 3 + 2 factorial arrangement of 8 treatments and 8 replications each. The main effects included EZ supplementation (10,000 FTU kg−1) and AACM inclusion level (100, 70, and 40% of inorganic mineral recommendations), plus 2 control treatments. The group of hens fed AACM-100 showed lower feed intake than the inorganic mineral (IM) group. The diet containing AACM-EZ-70 provided a higher (p < 0.05) laying percentage and a lower (p < 0.05) feed conversion ratio than both the IM and IM-EZ diets. The groups fed AACM-EZ-40, AACM-EZ-100, and AACM-70 produced heavier yolks (p < 0.05). Hens fed IM laid eggs with the lowest yolk and albumen weights (p < 0.05). Layers fed with AACM-100 and AACM-70 produced the most resistant eggshells to breakage (p < 0.05). In diets containing phytase, the optimal AACM recommendations for better performance and egg quality in older laying hens are: 42, 49, 5.6, 28, 0.175, and 0.70 mg kg−1 for Zn, Mn, Cu, Fe, Se, and I, respectively.

Complexed amino acid minerals vs. bis-glycinate chelated minerals: Impact on the performance of old laying hens

“…Research has shown that trace minerals bound to nonspecific essential amino acids in a 1:1 ratio can enhance the development of reproductive organs in laying hens ( Pereira et al., 2020 ), increase bone mineralization, and decrease phosphorus (P) excretion in layer-type chickens ( Medeiros-Ventura et al., 2023 ; Ventura et al., 2020 ). They have also been found to improve egg production in laying hens and broiler breeders ( Carvalho et al., 2015 ; Favero et al., 2013 ).…”

Correction: Medeiros-Ventura et al. The Impact of Phytase and Different Levels of Supplemental Amino Acid Complexed Minerals in Diets of Older Laying Hens. Animals 2023, 13, 3709

“…To allow the original publication to be better understood [ 1 ], the authors would like to make the following updates.…”