1. Additives in Supplements for Grazing Beef Cattle.
- Author
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Naves, Karine R. S., Moraes, Kamila. A. K., Cunha, Lorrayne O. da, Petrenko, Natasha B., Ortelam, Juliana C., Sousa, Jarliane N., Covatti, Caroline F., Nunes, Dener, Chaves, Carla S., Menezes, Flávio L. de, Oliveira, André S. de, and Moraes, Eduardo H. B. K.
- Subjects
FOOD additives ,BEEF cattle ,MICROBIOLOGICAL synthesis ,CATTLE productivity ,MAGIC squares - Abstract
Simple Summary: Nutritional strategies such as supplementation may be effective in maintaining the productivity of beef cattle raised on pastures. To optimize animal production, feed additives are used together with supplements to ensure an interaction between basal and supplementary resources. This study aimed to evaluate how additives in protein–energy supplements (PESs) improve beef cattle raised on pasture. Five cattle were tested via a 5 × 5 Latin square design, with treatments including a mineral mixture (MM) and a PES with or without additives such as monensin sodium, functional oil, or active yeast. Compared with MM, the PES increased total dry matter intake (DMI), crude protein intake, and nitrogen levels. However, the additives did not significantly impact nutrient intake or digestibility. The PES also increased microbial nitrogen synthesis and efficiency. Pasture-based beef cattle production systems aim to maximize the interaction between forage and supplements to increase activity. In addition, supplementation and the use of food additives help optimize production efficiency and improve the use of additional nutrients. The aim of this study was to evaluate the effects of the use of additives in protein–energy supplements (PESs) on the intake, digestibility, and ruminal parameters of beef cattle raised on pasture in the rearing phase. Five male cattle were allocated to a 5 × 5 Latin square design, with five experimental periods and five treatments. The animals were kept under continuous grazing in individual paddocks of marandu palisadegrass (Urochloa brizantha cv. Marandu). The treatments consisted of a mineral mixture (MM) (0.080 kg/animal/day), PES (4.0 kg/animal/day), PES with monensin sodium (120 mg/animal/day), PES with functional oil (2500 mg/animal/day) and PES with active yeast (4000 mg/animal/day). PESs increased the total dry matter intake (DMI) (kg/day) and the DMI in terms of % body weight (%BW) and increased the intake of crude protein (CP) and the dry matter intake of digestible organic matter (DOM). The use of additives did not affect nutrient intake or digestibility. Compared with MM, the PES increased the concentrations of ruminal ammonia nitrogen and serum urea nitrogen. In addition, there was an increase in fecal nitrogen, retained nitrogen, microbial nitrogen synthesis and microbial efficiency. The use of monensin sodium, functional oil and active yeast in protein–energy supplements for beef cattle in pastures did not affect the nutritional parameters under the conditions observed in this study. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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