DIETARY SUPPLEMENTATION WITH PLANT OILS FROM COPAÍBA (Copaifera langsdorffii) AND SUCUPIRA (Pterodon emarginatus): QUALITY OF PHYSICAL ASPECTS OF EGGS STORED UNDER DIFFERENT TEMPERATURES

Abstract The aim of this study was to evaluate the effects of the dietary supplementation of laying hens with natural oils on the quality of fresh eggs stored under refrigeration ® and room temperature (RT). Hens were fed balanced corn-soybean diets supplemented with increasing levels of Copaifera langsdorffii (CP-0.03; 0.06 and 0.09%) or Pterodon emarginatus (SC-0.03 and 0.06%) oilresins plus a negative control (CN). Periodically, three eggs per treatments were evaluated for haugh unit (HU); yolk index (YI); yolk color (L*, a* e b*); yolk and albumen pH and percentages of shell (PS); albumen (PA) and yolk (PY). Statistical analysis was performed using a mixed model (SAS 9.3) and Tukey test. The supplementation of 0.06% CP and 0.03% SC preserved (p<0.05) HU in eggs stored in RT during 14 days, similarly to results found in R. In addition, dietary supplementation of natural oils helped to control pH levels in yolks during RT storage. In conclusion, the dietary supplementation of copaiba and sucupira showed positive effects on albumen quality and yolk pH for eggs stored at room temperature, however, no additional effect was found for eggs stored chilled.

摘要 本研究旨在评估日粮添加天然油脂对冷藏与室温（RT）条件下储存的鲜蛋品质的影响。试验选取产蛋鸡，饲喂基础平衡型玉米-大豆日粮，分别添加梯度浓度的巴西苦油树（Copaifera langsdorffii，CP：0.03%、0.06%、0.09%）或苏皮拉树（Pterodon emarginatus，SC：0.03%、0.06%）油树脂，并设置阴性对照组（CN）。定期采集各处理组的3枚鸡蛋，对其哈氏单位（HU）、蛋黄指数（YI）、蛋黄颜色（L*、a*、b*）、蛋黄与蛋清的酸碱度，以及蛋壳比例（PS）、蛋清比例（PA）和蛋黄比例（PY）进行检测。采用混合模型（SAS 9.3）与Tukey检验开展统计分析。结果表明，添加0.06% CP与0.03% SC可在室温储存14天的条件下维持鸡蛋的哈氏单位（P<0.05），与冷藏组（R）的检测结果一致。此外，日粮添加天然油脂有助于调控室温储存过程中蛋黄的酸碱度水平。综上，日粮添加巴西苦油树油树脂与苏皮拉树油树脂可对室温储存鸡蛋的蛋清品质与蛋黄酸碱度产生积极影响，但对冷藏储存的鸡蛋未观察到额外增益效果。