Effects of Different Doses of Multienzyme Supplementation on Growth Performance, Duodenal pH and Morphology, and Carcass Traits in Broilers Fed Diets with an Increasing Reduction in Energy
by
, ,
Mosaad Hashim
1, 
David Gonzalez-Sanchez
2,*,
Alexandra Wealleans
2,
Mohamed Abdelkader
2,
Salah Abdel Rahman El-Safty
1,3 and
Abdel Rahman Y. Abdelhady
1,3
1
Applied Feed Research House (AFRH), Orabi Community, Obour City 11828, Egypt
2
Kemin Animal Nutrition and Health, 2200 Herentals, Belgium
3
Department of Poultry Production, Faculty of Agriculture, Ain Shams University, Hadayek Shoubra, Cairo 11241, Egypt
*
Author to whom correspondence should be addressed.
Animals 2023, 13(14), 2378; https://doi.org/10.3390/ani13142378
Submission received: 19 June 2023
/
Revised: 17 July 2023
/
Accepted: 20 July 2023
/
Published: 21 July 2023
(This article belongs to the Collection Poultry Nutrition and Metabolism)
Simple Summary
Feed cost accounts for around 70% of the total production cost in broiler production, and finding strategies to reduce it is of paramount importance to achieving sustainable profitability. Among other strategies to reduce feed cost, the use of carbohydrases and proteases has been widely implemented in many poultry operations around the globe. In broiler production, the use of these enzymes can improve performance and can be supplemented to reduce energy–cost, with the aim of improving overall profitability. Moreover, these enzymes can also provide benefits to some carcass traits. The present study aims to evaluate the effects of supplementing different doses of a multienzyme complex containing carbohydrases and a protease on growth performance, duodenal pH and morphology, and carcass traits in broilers fed diets that are increasingly reduced in energy. Our results showed that this multienzyme complex could improve performance and duodenal morphology and reduce abdominal fat in broiler chickens fed reduced-energy diets.
Abstract
This study evaluated the effects of supplementing different doses of a multienzyme (KZP) consisting of carbohydrases and a protease on growth performance, duodenal pH and morphology, and carcass traits in broilers fed diets with increasing reductions in energy. One thousand two hundred one-day-old broiler chicks were allocated to five dietary treatments with eight replicates of 30 birds each: a positive control diet formulated to meet Arbor Acres’ nutritional requirements (PC); a negative control diet reformulated to 80 kcal/kg less than the apparent metabolizable energy (AME) of the PC (NC1); a negative control diet reformulated to 120 kcal/kg less than the AME of the PC (NC2); an NC1 diet supplemented with 300 g/t of KZP (NC1 + KZP300); and an NC2 supplemented with 500 g/t of KZP (NC2 + KZP500). Growth performance was measured throughout the study. At 35 days, 10 birds per treatment were randomly selected and euthanized for a carcass trait evaluation, and samples of the duodenum were collected for morphological examination and pH level determination. The final average body weight and feed conversion ratio were better (p < 0.05) for the broilers in the NC1 + KZP300 group compared to those in NC1, NC2 and NC2 + KZP500 groups and were similar to those of the PC birds (p > 0.05). Birds from the NC1 + KZP500 group showed a better (p < 0.05) final body weight and feed efficiency compared to the NC1 and NC2 groups. The villus height was greater (p < 0.05) for the PC and NC1 + KZP300 groups compared to the rest of the treatments. The crypt depth was longer (p < 0.05) for the NC1 and NC2 groups compared to the NC1 + KZP300 group. The supplementation of KZP to both the NC1 and NC2 diets reduced (p < 0.05) the abdominal fat %. This study demonstrates that supplementing energy-reduced diets with KZP improved performance in broiler chickens.
Keywords:
multienzyme; NSP; broilers; carbohydrase; protease; feed cost; intestinal morphology; carcass traits
