Zahirian Mehdi, Seidavi Alireza, Solka Magdalena, Nosrati Mehran, Corazzin Mirco
Department of Animal Science, Rasht Branch, Islamic Azad University, Rasht, Gilan, 41335-3516, Iran.
Department of Genomics, Institute of Genetics and Animal Breeding PAS, ul., Postępu 36A, 05-552, Jastrzębiec, Poland.
Trop Anim Health Prod. 2019 Nov;51(8):2263-2268. doi: 10.1007/s11250-019-01930-1. Epub 2019 May 31.
This study investigated the effect of different levels and consumption periods of Aspergillus oryzae meal on performance, carcass characteristics, blood variables, and immunity of broiler chickens. A total of 270 (male and female) Ross 308 chicks were randomly assigned to 9 treatment groups. Two levels (2 g/kg diet and 4 g/kg diet as-fed) of Aspergillus oryzae meal (AO) and 4 consumption periods of AO (starter, grower, finisher, and entire period) in a 2 × 4 factorial arrangement were used. Compared with control, AO used during the entire rearing period increased weight gain, reduced relative weight of abdominal fat, aspartate aminotransferase (AST), and alanine aminotransferase (ALT) serum levels, and increased antibody titers against influenza and Newcastle disease vaccination and sheep red blood cells injection. Few differences in the variables considered were found if AO was added to broiler diets only during specific consumption periods, and between the two supplementation levels of AO. In conclusion, the addition of AO to the broiler diet can have beneficial effects in terms of performance, carcass composition, and health, but these positive effects were mainly reached adding AO for the entire rearing period.
本研究调查了不同水平和饲喂期的米曲霉粕对肉鸡生产性能、胴体特性、血液指标及免疫力的影响。总共270只（公母混合）罗斯308雏鸡被随机分配到9个处理组。采用2×4析因设计，设置两个米曲霉粕（AO）水平（分别为2克/千克日粮和4克/千克日粮，以风干基础计）以及4个AO饲喂期（幼雏期、生长期、育肥期和整个饲养期）。与对照组相比，在整个饲养期使用AO可增加体重增重，降低腹脂相对重量、血清天冬氨酸转氨酶（AST）和丙氨酸转氨酶（ALT）水平，并提高针对流感和新城疫疫苗接种以及绵羊红细胞注射的抗体滴度。若仅在特定饲喂期将AO添加到肉鸡日粮中，以及在AO的两个添加水平之间，所考察变量的差异较小。总之，在肉鸡日粮中添加AO在生产性能、胴体组成和健康方面可产生有益影响，但这些积极影响主要是在整个饲养期添加AO时实现的。
