The benefits of using the oxidized oils from rendering and recycling as an economic source of lipids and energy in animal feed always coexist with the concerns that diverse degradation products in these oxidized oils can negatively affect animal health and performance. Therefore, the quality markers that predict growth performance could be useful when feeding oxidized oils to non-ruminants. However, the correlations between growth performance and chemical profiles of oxidized oils have not been well examined. In this study, six thermally oxidized soybean oils (OSOs) with a wide range of quality measures were prepared under different processing temperatures and processing durations, including 45 °C-336 h; 67.5 °C-168 h; 90 °C-84 h; 135 °C-42 h; 180 °C-21 h; and 225 °C-10.5 h. Broilers and nursery pigs were randomly assigned to diets containing either unheated control soybean oil or one of six OSOs. Animal performance was determined by measuring body weight gain, feed intake, and gain to feed ratio. The chemical profiles of OSOs were first evaluated by common indicative tests, including peroxide value, thiobarbituric acid reactive substances, p-anisidine value, free fatty acids, oxidized fatty acids, unsaponifiable matter, insoluble impurities, and moisture, and then analyzed by the liquid chromatography-mass spectrometry-based chemometric analysis. Among common quality indicators, p-anisidine value (AnV), which reflects the level of carbonyl compounds, had the greatest inverse correlation with the growth performance of both broilers and pigs, followed by free fatty acids and oxidized fatty acids. Among the 17 aldehydes identified in OSOs, C9-C11 alkenals, especially 2-decenal and 2-undecenal, had stronger inverse correlations (r < − 0.8) with animal performance compared to C5-C8 saturated alkanals, suggesting that chain length and unsaturation level affect the toxicity of aldehydes. As the major lipid oxidation products contributing to the AnV, individual C9-C11 unsaturated aldehydes in heavily-oxidized oils could function as effective prediction markers of growth and feed intake in feeding non-ruminants.

中文翻译：

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鉴定 C9-C11 不饱和醛作为饲喂氧化大豆油的非反刍动物生长和采食量的预测标志物。

使用提炼和回收的氧化油作为动物饲料中脂质和能量的经济来源的好处总是与这些氧化油中的多种降解产物会对动物健康和性能产生负面影响的担忧并存。因此，在向非反刍动物喂食氧化油时，预测生长性能的质量标记可能很有用。然而，氧化油的生长性能和化学特征之间的相关性尚未得到很好的检验。在这项研究中，在不同的加工温度和加工持续时间（包括 45 ℃-336 h）下制备了六种质量测量范围广泛的热氧化大豆油（OSOs）；67.5℃-168小时；90℃-84小时；135℃-42小时；180℃-21小时；和 225 °C-10.5 小时。肉鸡和保育猪被随机分配到含有未加热对照大豆油或六种 OSO 之一的日粮中。通过测量体重增加、采食量和增重与饲料的比率来确定动物性能。OSOs的化学特征首先通过常用指示性试验评估，包括过氧化值、硫代巴比妥酸反应物质、对茴香胺值、游离脂肪酸、氧化脂肪酸、不皂化物、不溶性杂质和水分，然后通过液体分析基于色谱-质谱的化学计量分析。在常见的质量指标中，反映羰基化合物水平的对茴香胺值（AnV）与肉鸡和猪的生长性能负相关性最大，其次是游离脂肪酸和氧化脂肪酸。在 OSO 中鉴定的 17 种醛中，C9-C11 烯醛，尤其是 2-癸烯醛和 2-十一烯醛，与 C5-C8 饱和烯醛相比，与动物性能具有更强的负相关性 (r < - 0.8)，这表明链长和不饱和水平影响醛的毒性。作为导致 AnV 的主要脂质氧化产物，重度氧化油中的单个 C9-C11 不饱和醛可以作为喂养非反刍动物生长和采食量的有效预测标志物。