Abstract
ABSTRACT The objective of this work was to evaluate the effect of increasing levels of guava agro-industrial waste (GAW) on the ingestive behavior of Santa Inês lambs. Forty non-castrated sheep of the Santa Inês breed were used, at an initial weight of 21.33 ± 2.62 kg, and at the age of 120 days, distributed in a completely randomized design, with five treatments and fed with increasing GAW levels (0.0, 7.5, 15.0, 22.5 and 30.0%). The average daily gain (ADG) showed orthogonal contrast (P <0.05), in which the animals that ingested the control diet had lower performances. The animals with GAW added to the diet obtained more significant weight gains reflected by a better feed conversion. Among the variables, idleness, feeding, and total chewing time had a significant effect (P<0.05); animals spent more time idle at the 30.0% inclusion level and less time in the control group. However, the means of the 7.5, 15.0, and 22.5% GAW inclusion levels were statistically similar to the control group and the 30.0% level. There was a significant effect (P<0.05) on feed efficiency, with the lowest values being presented for the control group and the highest values at the 30% inclusion level of GAW. The 30.0% GAW feed for lambs in confinement reduces feed time, and total chewing prolongs idleness and increases feed efficiency without compromising dry matter intake, neutral detergent fiber intake, and ADG.
Highlights
Animal behavior is a way of looking at the entire production system, including the animal's activities in its social and physical environment (Custodio et al, 2017)
The objective of this work was to evaluate the effect of increasing levels of guava agroindustrial waste (GAW) on the ingestive behavior of Santa Inês lambs
The means of the 7.5, 15.0, and 22.5% GAW inclusion levels were statistically similar to the control group and the 30.0% level
Summary
Animal behavior is a way of looking at the entire production system, including the animal's activities in its social and physical environment (Custodio et al, 2017). The use of alternative products in sheep feed did not affect the consumption of MS and NDF, nor did they modify the ingestive behavior of these animals. The search for alternative feeds for ruminants such as agro-industrial byproducts may be an alternative method for reducing the expenses associated with using concentrate (Alves et al, 2010; Azevedo et al, 2013). The agroindustrial waste (seeds) from the guava (Psidium guajava) has 87.06% of unsaturated fatty acid and 63.94 g 100g1 of total dietary fiber (Uchoa-Thomaz et al, 2014). The primary determinant for greater inclusion of GAW in feed is tannin, lignin, saponin, and phytic acid, which are anti-nutritional factors found mainly in the guava seeds (Maniyan et al, 2015). Our study hypothesizes that the use of guava agro-industrial residue, due to the presence of tannin in its composition, interferes with the ingestive behavior of ruminants. The objective of this work was to evaluate the effect of increasing levels of guava agroindustrial residue on the ingestive behavior of Santa Inês lambs
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