Lipids (fats and oils) are a concentrated source of energy in poultry diets that improves palatability, feed consistency, provides essential fatty acids and increases the absorption of fat-soluble vitamins. Fresh oil is an expensive energy source and its exposure to air, heat, metallic catalyst during storage and processing may lead to its oxidative deterioration. This review highlights the response of modern poultry to dietary oxidized oil on growth performance, nutrients digestibility, gut health, carcass characteristics, meat quality, blood chemistry and tissue oxidative status. Literature shows that in moderately (peroxide value (PV): 20 to 50 meq kg⁻¹) and highly (PV: 50 to 100 meq kg⁻¹ or above) oxidized oils, lipid peroxidation causes rancid odours and flavours that negatively affect feed palatability, reduces intestinal villus height that decreases the surface area available for nutrients absorption. The oxidation products also damage fat soluble vitamins (A, D, E and K) in blood resulting in an oxidative stress. The use of oxidized oil in poultry diets has no significant effect on dressing percentage, pH and meat colour, whereas carcass weight decreases and drip loss of meat increases. Overall, there is a contradictory data regarding the influence of oxidized oil in poultry feed depending on the PV and inclusion levels. The reviewed literature shows that the use of mildly oxidized (PV < 20 meq kg⁻¹) oil in poultry feed with 4 to 5% inclusion level decreases the feed cost and ultimately cost of poultry production without compromising their growth performance. It can, therefore, partially replace fresh oil as an efficient, cost effective and sustainable energy source in poultry diets.

中文翻译：

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膳食氧化油对家禽生长性能，肉品质和生化指标的影响-综述

脂质（脂肪和油脂）是家禽日粮中的一种集中能量来源，可改善适口性，饲料稠度，提供必需的脂肪酸并增加脂溶性维生素的吸收。新鲜油是一种昂贵的能源，在存储和加工过程中暴露于空气，热，金属催化剂可能会导致其氧化变质。这篇综述强调了现代家禽对膳食氧化油对生长性能，营养物质消化率，肠道健康，car体特性，肉质，血液化学和组织氧化状态的反应。文献表明，适度（过氧化物值（PV）：20至50 meq kg ^-1）和高度（PV：50至100 meq kg ^-1（或以上）氧化的油脂，脂质的过氧化作用会产生臭味和臭味，对饲料的适口性产生负面影响，降低肠绒毛的高度，从而减少可吸收营养的表面积。氧化产物还会破坏血液中的脂溶性维生素（A，D，E和K），从而导致氧化应激。家禽日粮中使用氧化油对调味率，pH和肉色没有显着影响，而car体重量减少而肉滴失增加。总体而言，关于家禽饲料中氧化油的影响取决于PV和夹杂物含量的数据存在矛盾。综述文献表明使用轻度氧化（PV <20 meq kg ^-1）夹杂物含量为4％到5％的家禽饲料中的油降低了饲料成本，最终降低了家禽生产成本，同时又不影响其生长性能。因此，它可以部分替代新鲜油，作为家禽日粮中的一种高效，具有成本效益和可持续的能源。