摘要
The objective of this study was to explore the substitution of ractopamine by coconut or safflower oil in finishing pig diets. The study included 24 crossbred barrows weighing 78.00 ± 8.76 kg distributed in a randomized block design with four treatments and six replicates composed of: basal ration (BR), BR + 10 ppm ractopamine, BR + four 1 g capsules of safflower oil, and BR + four 1 g capsules of coconut oil. Performance evaluation showed that safflower oil, ractopamine, and coconut oil supplementation had a significant effect (P < 0.05) on weight gain and feed conversion. Carcass-related variables were also affected by the treatments (P < 0.05), with fat thickness 3 (FT3) reduced by the use of safflower oil, ractopamine, and coconut oil. Rib eye area was positively affected (P < 0.05) by diet, with ractopamine, coconut oil, and safflower oil supplementation treatments showing higher values than control diet treatment. The diets also affected fatty acid profiles (P < 0.05), with decreased myristic acid content in animals supplemented with ractopamine and safflower oil and increased deposition of palmitoleic and oleic acids in animals supplemented with coconut oil and safflower oil, respectively. Results suggested that both safflower oil and coconut oil can be used as substitutes for ractopamine.
摘要译文
这项研究的目的是探索在猪的日粮中用椰子油或红花油替代莱克多巴胺。研究包括24头重78.00±8.76千克的杂种公猪，它们以随机区组设计分布，进行四种处理和六次重复，组成为：基础日粮（BR），BR + 10 ppm莱克多巴胺，BR +四个1 g红花油胶囊和BR + 4 1克椰子油胶囊。性能评估表明，补充红花油，莱克多巴胺和椰子油对增重和饲料转化率有显着影响（P <0.05）。体相关的变量也受到处理的影响（P <0.05），使用红花油，莱克多巴胺和椰子油可降低脂肪厚度3（FT3）。饮食对肋眼面积有正向影响（P <0.05），而莱克多巴胺，椰子油和红花油补充剂的添加比对照饮食具有更高的价值。日粮还影响了脂肪酸的分布（P <0.05），补充了莱克多巴胺和红花油的动物体内的肉豆蔻酸含量降低，而补充了椰子油和红花油的动物中棕榈油酸和油酸的沉积增加。结果表明，红花油和椰子油均可以替代莱克多巴胺。
COSTA; Clara Viviane Silva da et al.. Substitution of ractopamine by safflower or coconut oil as an additive in finishing pig diets.[J]. Ciencia Rural, 2020,50(6)