Performance of beef heifers supplemented with sodium lasalocid

Abstract

This study was conducted on 78 13-month-old crossbred beef heifers that weighed 215 kg in Southern Rio Grande do Sul (RS) State, Brazil. We evaluated the performance of beef heifers that were reared in a pasture system that received a mineral supplement energy-type protein with added sodium lasalocid (LAS). The heifers were randomly and uniformly divided into 2 groups, with 39 animals in each group. One group of animals received a mineral supplement energy-type protein without sodium lasalocid (CON), and the other group received a mineral supplement energy-type protein with added LAS. The mean feed intake, the body weight (BW), the average daily gain (ADG), the body condition score (BCS), and ovarian cyclicity were recorded, and economic parameters were calculated. No differences in supplement intake were observed between the groups, which ensures adequate intake of the other components of the mineral mixture, which are part of the nutritional requirements for the production process. Similarly, no difference in the ADG was observed between treatments. We observed that the heifers in the LAS group had a higher BW gain (51 kg) that the CON heifers (40 kg; P < 0.05). In addition, LAS-supplemented heifers had a higher BCS (3.53) than CON heifers (3.38) at the end of the experiment (P < 0.05). The heifers supplemented with LAS had a higher profitability than the CON heifers, even with the higher cost of the supplement containing LAS; this effect was due to the higher live BW at the end of the study. We concluded that the administration of a mineral supplement energy-type protein with added LAS has beneficial effects on beef heifers in terms of production and economic feasibility.

Immunocastration on performance and meat quality of Bos indicus (Nellore) cattle under different nutritional systems

“…Increased DWG and feed efficiency caused by lasalocid supplementation have been described in the literature (Zinn, 1987). On the other hand, Sartori et al, 2017, when studying the growth of pasture-grazed heifers supplemented or not with lasalocid, with an average mineral salt intake of 0.180 kg d -1 and 216 mg d -1 of lasalocid, similar to the values in our study, did not observe an increase in weight gain of the animals. However, the authors reported that the body condition score was more pronounced in the group that consumed lasalocid.…”

Tecnologias agropecuárias e ambientais : revisões e aplicações

“…A pecuária brasileira dispõe em sua maior parte, de rebanho criado em sistema de pastejo . Uma das maneiras de aumentar a eficiência produtiva do sistema de produção de carne é tornar o animal mais eficiente por meio do manejo da fermentação ruminal, assim sendo, os aditivos alimentares são usados para manipular e otimizar esse processo (SARTORI et al, 2017). Alguns estudos evidenciaram a existência de uma grande variedade de aditivos capazes de influenciar os componentes do metabolismo ruminal, como exemplos, inibidores da metanogênese, proteólise e desaminação; antibióticos; agentes defaunantes; enzimas microbianas; alimentação com ácidos graxos e lipídios; agentes tamponantes; probióticos; ácidos orgânicos; aditivos microbianos e surfactantes nãoiônicos (BERCHIELLI et al, 2011).…”

Supplementation of grazing beef cattle with narasin

“…The use of ionophores in mineral mixtures is an economical and easy alternative for producers who are trying to improve cattle performance (Sartori et al, 2017). In the literature, divergent results have been reported regarding the effect of these additives on the performance of cattle under grazing systems, as reviewed by Bretschneider et al (2008), which may be explained by the daily variations in mineral supplement intake (Bagley et al, 1988;Sartori et al, 2017).…”

“…The use of ionophores in mineral mixtures is an economical and easy alternative for producers who are trying to improve cattle performance (Sartori et al, 2017). In the literature, divergent results have been reported regarding the effect of these additives on the performance of cattle under grazing systems, as reviewed by Bretschneider et al (2008), which may be explained by the daily variations in mineral supplement intake (Bagley et al, 1988;Sartori et al, 2017). Although ionophores have been shown to improve the performance of beef cattle on pasture (Sartori et al, 2017;Polizel et al, 2018), their use is limited, likely due to the labor required for their administration in grazing conditions.…”