Productive and behavioral parameters of goats fed with exogenous enzymes in the diet
DOI:
https://doi.org/10.35699/2447-6218.2023.43886Keywords:
Additive, Amylolytic, Capra aegagrus hircus, Fibrolytic, ProteolyticAbstract
The use of exogenous enzymes is a biotechnology used to optimize the production of ruminants, improving ruminal digestibility and degradability in the most diverse foods. The objective was to evaluate the effect of exogenous enzymes supplied as an additive in goat feed on productive and behavioral parameters. Twenty-one crossbred kids ½ Anglo Nubian x ½ Saanen, with an average age of 2 months, weighing an average of 16.77 kg were used. They were housed in collective pens, divided into four treatments: Control (without any addition of enzyme); Amaize® (amylolytic enzyme); Allzyme® (enzyme mix) and Fibrozyme® (fibrolytic enzyme). They evaluated dry matter intake (DMI), performance and ingestive behavior. The design used was completely randomized. Treatment means were evaluated by the SNK test, periods by regression analysis of linear and quadratic effects at 5% significance. The body condition score (BCS) variable was evaluated using non-parametric statistics. The animals showed an exponential increase in DMI over the period. There was a negative linear effect for the variables intake (ING) and mastication (MAST). There was a positive linear effect for the OCIO variable. There was no difference between treatments for average daily gain (ADG) and total weight gain (GPT). The body growth data showed a quadratic effect, with the exception of posterior height (AP), which showed a positive linear effect for the period. ECC showed statistical difference between periods. There was interaction between treatments and evaluation period for breast width (PL), with the Control treatment showing a positive linear response and the Amaize®, Allzyme® and Fibrozyme® treatments showing a quadratic response. The use of exogenous enzymes does not affect the productive and behavioral parameters of developing goats.
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