| Autor: |
Diogénes LV; Animal Science and Health Graduate Program, Federal University of Campina Grande, Patos 58708-110, Brazil., Edvan RL; Animal Science Department, Federal University of Piaui, Teresina 64049-550, Brazil., Medeiros EDS; Animal Science and Health Graduate Program, Federal University of Campina Grande, Patos 58708-110, Brazil., Pereira Filho JM; Animal Science and Health Graduate Program, Federal University of Campina Grande, Patos 58708-110, Brazil., de Oliveira JPF; Animal Science Department, Federal University of Sergipe, Nossa Senhora da Glória 49680-000, Brazil., Silva Filho EC; Interdiscisciplinary Laboratory of Advanced Materials, Chemistry Department, Federal University of Piaui, Teresina 64049-550, Brazil., Ramos LMG; Animal Science and Health Graduate Program, Federal University of Campina Grande, Patos 58708-110, Brazil., de Lucena KHOS; Animal Science and Health Graduate Program, Federal University of Campina Grande, Patos 58708-110, Brazil., Araújo MJ; Animal Science Department, Federal University of Piaui, Teresina 64049-550, Brazil., Oliveira RL; Animal Science Department, Federal University of Bahia, Salvador 40170-110, Brazil., Pereira ES; Animal Science Department, Federal University of Ceara, Fortaleza 60020-181, Brazil., Bezerra LR; Animal Science and Health Graduate Program, Federal University of Campina Grande, Patos 58708-110, Brazil. |
| Abstrakt: |
The effects of the replacement of dry ground corn (GC) with corn-grain silage rehydrated with water (RCSwater), cactus pear mucilage (RCSmucilage), and whey (RCSwhey) on the growth, physicochemical composition, and fatty acid profile of goat kids’ meat were investigated. Thirty-two crossbred goat kids (16.4 ± 2.50 kg initial weight) were assigned in a randomized block design with four treatments and eight repetitions. The NDF intake of goat kids fed with RCSmucilage was higher in comparison to RCSwater and RCSwhey (p = 0.0009). The dietary replacement of GC by RCSmucilage increased the final weight (p = 0.033) and meat-cooking losses (p = 0.0001) of kids. The concentrations of oleic (p = 0.046), 11,14-eicosadienoic (p = 0.033), and EPA (p = 0.010) were higher in the meat of kids fed with RCSmucilage and RCSwhey, and the α-linolenic concentration was higher (p = 0.019) for animals feeding with RCSmucilage. Meat from kids fed with RCSwhey presented the lowest ∑SFA and the highest ∑MUFA. In contrast, the ∑PUFA (p < 0.012) was higher for goats fed with RCSwater. The ∑ω3 (p < 0.0001) was higher in animals fed with RCSmucilage and RCSwhey. Desirable fatty acids were higher (p = 0.044) in animals fed with RCSmucilage and RCSwhey, and the atherogenicity (p = 0.044) and thrombogenicity (p < 0.0001) indexes were lower for goats fed the RCSwhey diet. The enzymatic activities of Δ9desaturase (C16) were higher (p = 0.027) in goat kids fed with GC and RCSmucilage, and Δ9desaturase (C18) was higher (p = 0.0497) when goats were fed with RCSmucilage and RCSwhey. Elongase activities were higher (p = 0.045) in goat kids fed with GC and RCSwater. The total replacement of GC by RCSmucilage is recommended in the diet of goat kids due to improvements in the weight gain and proportion of desirable fatty acids in the meat. In addition, RCSmucilage promoted better conservation of the silage at a lower cost when compared to commercial additives. |
