Trairatapiwan Tassanee, Lertpatarakomol Rachakris, Chotikatum Sucheera, Lukkananukool Achara, Mitchaothai Jamlong
Faculty of Veterinary Medicine, Mahanakorn University of Technology (MUT), Bangkok 10530, Thailand.
Department of Animal Production Technology and Fisheries, School of Agricultural Technology, King Mongkut's Institute of Technology Ladkrabang (KMITL), Bangkok 10520, Thailand.
Animals (Basel). 2025 Aug 5;15(15):2287. doi: 10.3390/ani15152287.
This study investigated the effects of reducing organic trace minerals below commercial inclusion levels and compared them with both low-dose and commercial levels of inorganic trace minerals, focusing on growth performance, carcass traits, tibia characteristics, oxidative stress (superoxide dismutase [SOD] and malondialdehyde [MDA]), and immune response (serum IgG) in broilers. A total of 384 one-day-old Ross 308 chicks were randomly assigned to three dietary treatments: (1) commercial-level inorganic trace minerals (ILI; Zn 100 ppm; Cu 15 ppm; Fe 100 ppm; Mn 80 ppm; Se 0.2 ppm; I 3 ppm); (2) low-level organic trace minerals (LLO; Zn 30 ppm; Cu 4 ppm; Fe 11 ppm; Mn 30 ppm; Se 0.225 ppm; I 3 ppm), and (3) low-level inorganic trace minerals (LLI; Zn 30 ppm; Cu 4 ppm; Fe 11 ppm; Mn 30 ppm; Se 0.2 ppm; I 3 ppm). Each treatment consisted of eight replicates with 16 birds per replicate, and diets were provided in two phases: starter (days 1-21) and grower (days 22-35). The results showed that the LLO group demonstrated a significantly improved feed conversion ratio (FCR) during the starter phase, 2.4% better than that of the ILI and LLI groups ( = 0.02). Additionally, filet and thigh muscle yields in the LLO group were higher by 11.9% ( = 0.03) and 13.9% ( = 0.02), respectively, compared to the ILI group. Other carcass traits, as well as pH and drip loss, were not significantly affected. However, tibia breaking strength at day 35 was 15.1% lower in the LLO group compared to the ILI group ( = 0.02). No significant differences were observed in oxidative stress markers or IgG levels among groups. This study demonstrated that reducing the inclusion level of inorganic trace minerals did not negatively affect broiler growth performance, whereas supplementation with low levels of organic trace minerals improved both growth performance and carcass quality.
本研究调查了将有机微量元素添加量降至商业添加水平以下的效果，并将其与低剂量和商业水平的无机微量元素进行比较，重点关注肉鸡的生长性能、胴体性状、胫骨特征、氧化应激（超氧化物歧化酶[SOD]和丙二醛[MDA]）以及免疫反应（血清IgG）。总共384只1日龄的罗斯308雏鸡被随机分配到三种日粮处理组：（1）商业水平的无机微量元素组（ILI；锌100 ppm；铜15 ppm；铁100 ppm；锰80 ppm；硒0.2 ppm；碘3 ppm）；（2）低水平有机微量元素组（LLO；锌30 ppm；铜4 ppm；铁11 ppm；锰30 ppm；硒0.225 ppm；碘3 ppm），以及（3）低水平无机微量元素组（LLI；锌30 ppm；铜4 ppm；铁11 ppm；锰30 ppm；硒0.2 ppm；碘3 ppm）。每个处理组包括8个重复，每个重复16只鸡，日粮分两个阶段提供：育雏期（第1 - 21天）和生长期（第22 - 35天）。结果表明，LLO组在育雏期的饲料转化率（FCR）显著提高，比ILI组和LLI组高2.4%（P = 0.02）。此外，与ILI组相比，LLO组的胸肉和大腿肌肉产量分别高出11.9%（P = 0.03）和13.9%（P = 0.02）。其他胴体性状以及pH值和滴水损失均未受到显著影响。然而，与ILI组相比，LLO组在第35天的胫骨断裂强度低15.1%（P = 0.02）。各组之间在氧化应激标志物或IgG水平上未观察到显著差异。本研究表明，降低无机微量元素的添加水平不会对肉鸡的生长性能产生负面影响，而添加低水平的有机微量元素可改善生长性能和胴体品质。
