Resumo

CONTRERAS MARQUEZ, David Esteban et al. Productive, nutritional, and metabolic performance of multiparous female sheep receiving injectable mineral supplementation. Acta Agron. [online]. 2023, vol.72, n.4, pp.361-367.  Epub 30-Abr-2025. ISSN 0120-2812.  https://doi.org/10.15446/acag.v72n4.113596.

The objective of this research was to determine the effect of mineral supplementation by intramuscular route on the productive, nutritional, and metabolic performance of female sheep. Eighteen animals with an average weight of 48.61 kg were divided into two treatments (n = 9): without mineral supplementation (SSM), and with mineral supplementation (CSM). The animals were stabled for 62 days and weighed after a 12-hour fast at the beginning and end of the research to determine the average daily gain (ADG). The mineral supplement with selenium (Se), calcium (Ca), phosphorus (P), and magnesium (Mg) was applied in the CSM treatment at a dose of 3 mL/100 kg of live weight (LW). Halfway through the research, blood was collected by jugular venipuncture to determine the concentration of macrominerals (Ca, P, Mg), and metabolites related to energy and protein metabolism. During the experimental period, all animals received daily hay ad libitum plus 290 g of a supplement formulated to provide 30.76 % of crude protein (CP)/dry matter (DM). A digestive assay was performed halfway through the research period to determine nutrient intake and digestibility. Treatments CSM and SSM did not show differences for ADG (70.79 g vs. 58.24 g), feed conversion (CA) (36.30 g/g vs. 37.43 g/g), dry matter digestibility (DMS) (76.44 % vs. 71.69 %), organic matter digestibility (OMD) (79.85 % vs. 74.75 %), and neutral detergent fiber digestibility (NDF) (81.33 % vs. 75.82 %), respectively (p > 0.05). SSM animals had a higher dry matter intake (DMI) (1.25 kg vs. 1.22 kg), higher organic matter intake (OMI) (1.17 kg vs. 1.15 kg) and higher neutral detergent fiber (NDF) intake (0.836 kg vs. 0.817 kg) (p < 0.001). Intramuscular mineral supplementation did not improve the productive, nutritional, and metabolic performance of non-pregnant and non-lactating sheep.

Palavras-chave : energy; minerals; metabolism; protein; ruminants.

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