Abstract

Hypothesis is that dietary ajwain (Trachyspermum copticum L.), a phytogenic feed additive, could improve the performance of broiler chickens. On a total of 200 Ross 308 male broilers, during the 42-d growing period (starter: day 1–14; grower: day 15–28 and finisher: day 29–42), varying levels of ajwain alcoholic extract (0, 150, 350 and 450 ppm) were added to the drinking water. A control treatment containing the Virginiamycin antibiotic was also studied. Within each treatment and period, the performances were evaluated and the Economic index calculated. On day 42, two birds per pen were killed and the carcase and organ weights determined. On day 42, on two birds per pen, blood samples were collected on the farm to study the serum parameters. On birds, vaccinated against sheep red blood cells at 14 and 35 days, blood samples were collected at 21 and 42 days of age to determine total Ig, IgG and IgM antibodies and, at day 42, the spleen and bursa of Fabricius were weighed. The microflora on the caecum content was counted. Ajwain extract significantly (p < .05) influenced productive performances, blood parameters, immune parameters and gut microbiota, indicating its possible role as a substitute for antibiotics in a sustainable poultry industry.

摘要

假设是饮食 ajwain ( Trachyspermum copticumL.)，一种植物性饲料添加剂，可以提高肉鸡的生产性能。在总共 200 只 Ross 308 雄性肉鸡上，在 42 天的生长期（起始：第 1-14 天；生长：第 15-28 天和育肥：第 29-42 天），不同水平的阿维因酒精提取物（0、150 、350 和 450 ppm）被添加到饮用水中。还研究了含有弗吉尼亚霉素抗生素的对照治疗。在每个处理和时间段内，评估性能并计算经济指数。在第 42 天，每栏杀死 2 只鸡，并测定胴体和器官重量。在第 42 天，每栏两只鸡，在农场采集血样以研究血清参数。在第 14 天和第 35 天接种绵羊红细胞疫苗的鸟类上，在 21 天和 42 天大时收集血液样本以确定总 Ig，在第 42 天，对 IgG 和 IgM 抗体以及法氏囊的脾脏和法氏囊进行称重。计数盲肠内容物上的微生物群落。Ajwain 提取物显着 (p  < .05) 影响生产性能、血液参数、免疫参数和肠道微生物群，表明其在可持续家禽业中作为抗生素替代品的可能作用。