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 本研究旨在探究不同组合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，随机分为4组：对照组饲喂基础日粮，其余三组分别添加CrFe、MgSe及CrFeMgSe复合添加剂，试验周期为屠宰前28天。试验采用随机区组设计，以2头猪作为一个试验单元。添加CrFeMgSe复合添加剂的试验组，其试验全程末重、平均日增重及采食量均显著下降，进而导致胴体重降低、背腰厚度减小、眼肌面积缩小及瘦肉率下降。CrFe、MgSe及CrFeMgSe三组的日粮有效运营成本均有所升高。两两组合添加CrFe与MgSe复合添加剂，并未对猪只生产性能参数及胴体性状产生显著影响。但同时添加四种矿物质的复合添加剂则会恶化上述各项指标，并提升生猪养殖生产成本。