Effect of supplementation of finishing swines with different associations between minerals on performance, carcass characteristics and economic viability

ABSTRACT This study aimed to verify the influence of supplementation with different associations between organic minerals on performance, carcass characteristics and economic viability for finishing swine. 88 castrated males were divided in four treatments: control with basal diet and supplementation with CrFe, MgSe and CrFeMgSe during the 28 days prior to slaughter. The experimental design was randomized blocks with an experimental plot represented by two animals. The animals supplemented with CrFeMgSe had worse final weight, daily weight gain and consumption throughout the period, with consequent reduction in carcass weight, lower loin depth, loin eye area and amount of lean meat. There was an increase in the effective operational cost of diet with CrFe, MgSe and CrFeMgSe groups, respectively. The use of chromium plus iron and magnesium plus selenium, associated two by two, did not alter the performance parameters and carcass. However, the four minerals association promote a worsening in these characteristics and increase the cost of production.摘要 本研究旨在验证不同组合的有机矿物质添加剂对育肥猪生产性能、胴体性状及经济可行性的影响。试验选取88头去势公猪，分为4个处理组：对照组饲喂基础日粮，其余三组分别添加CrFe、MgSe及CrFeMgSe，试验周期为屠宰前28天。试验采用随机区组设计，每个试验单元包含2头试验猪。结果表明，饲喂CrFeMgSe添加剂组的试验猪，其终末体重、全期日增重及采食量均显著劣于其他组，随之出现胴体重降低、眼肌深度减小、眼肌面积缩小以及瘦肉率下降的情况。CrFe、MgSe及CrFeMgSe组的日粮有效运营成本均有所提升。两两联合添加铬铁与镁硒组合，未对生产性能参数与胴体性状产生显著影响；但同时添加四种矿物质的组合则会恶化上述指标，并提高生产成本。