Abstract
This study evaluated the effect of multienzyme complexes (EC1 and EC2) in low nutritional density diets on performance and economic viability of broilers. A total of 840 day-old chicks were assigned to 7 treatments, distributed in a completely randomized design: (1) PC: positive control, basal diet formulated to meet nutritional requirements; (2) NC1: negative control, reduced energy and nutrient density diet without enzymes; (3) NC1+EC1; (4) NC2: negative control, diet formulated with 7% over-estimated crude protein and amino acids of soybean meal without enzymes; (5) NC2+EC2; (6) NC3: negative control, reduced energy and nutrient density diet and over-estimation of crude protein and amino acids of soybean meal; (7) NC3+EC1+EC2. Feeding NC1 or NC3 impaired feed conversion ratio at 7, 21 and 42 days, and NC2 at 21 days. Inclusion of EC2 in NC2 diet improved feed conversion ratio and kept it similar to basal diets from 1 to 21 days. Association of EC1 with EC2 in NC3 diet did not improve performance. In summary, inclusion of EC2 in diets with reduced nutrient density keep feed conversion ratio similar to basal diets from 1 to 21 days but does not improve performance of broiler chicken from 1 to 42 days post-hatch.
Highlights
The inclusion of exogenous enzymes in broiler diets has been increasingly intensified with the objective of maximizing nutrient utilization and reducing feed costs, improving dietary nutritional and energy levels (Adeola & Cowieson, 2011).Exogenous enzymes improve the nutritional value of feed ingredients due to the degradation of specific bonds not efficiently hydrolyzed by theActa Scientiarum
This study evaluated the inclusion of two enzymatic complexes, combined or not, in diets based on corn and soybean meal, reformulated with reduced energy and nutritional levels, on the performance and economic viability of broilers
The lack of beneficial effect of enzymes on the weight gain demonstrates that the changes promoted in NC1, NC2 and NC3 diets may not be suitable for all the periods, since even with improved digestibility promoted by the use of enzymes, the weight gain of birds was not similar to the control diet, considering the period 1-42 days
Summary
The inclusion of exogenous enzymes in broiler diets has been increasingly intensified with the objective of maximizing nutrient utilization and reducing feed costs, improving dietary nutritional and energy levels (Adeola & Cowieson, 2011).Exogenous enzymes improve the nutritional value of feed ingredients due to the degradation of specific bonds not efficiently hydrolyzed by theActa Scientiarum. When using exogenous enzymes in monogastric diets, with the expected improvement in nutrient digestion, it is possible to reduce the inclusion of high-cost ingredients like the soybean oil and soybean meal, allowing a reduction in feed cost, while maintaining the performance of poultry similar to that of achieved with a standard diet (Zhang, Yang, Zhang, Yang, & Jiang, 2012; Zou, Zheng, Zhang, Ding, & Bai, 2013; Romero et al, 2014). The strategic use of enzymes should be done taking into account the nutritional equivalence of the enzymatic products, because the use of inadequate (high) nutritional matrices, that is, the reformulation of the diet with nutritional and energy reductions wrongly performed, can disguise or even impair the benefit generated by the inclusion of enzymes (Adeola & Cowieson, 2011)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
