This study was carried out to evaluate the nutritional effects of rice feeding and carnitine addition to a diet for broiler chicks. Thirty‐six male 10‐day‐old broiler chicks were assigned to one of the following four treatment groups: corn‐based diet (corn group), rice‐based diet (rice group), and each diet with added carnitine (100 ppm). The experimental period was 2 weeks. Rice feeding resulted in significantly higher growth performance (body weight gain and feed efficiency) compared to corn feeding. Carnitine addition also resulted in higher growth performance. Breast muscle and thigh muscle weight (g) were significantly higher in broiler chicks fed rice and those fed diets with added carnitine. Liver mRNA expression of IGF‐I was significantly higher in broiler chicks fed rice compared to those fed corn. There was no significant difference in mRNA expression of muscle atrogin‐1 or liver CPT‐I between broiler chicks fed rice and those fed corn, not between broilers chicks fed diets containing carnitine or not. Overall, these results show that rice feeding and carnitine addition improve the growth performance of broiler chicks by increasing mRNA expression of liver IGF‐I. In addition, carnitine action is not affected by different cereals (corn and rice).

中文翻译：

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水稻喂养和肉碱添加对肉鸡生长性能和蛋白质代谢相关基因mRNA表达的影响。

本研究旨在评估在肉鸡日粮中添加大米和肉碱的营养效果。36 只 10 日龄的雄性肉鸡被分配到以下四个治疗组之一：以玉米为基础的饮食（玉米组）、以大米为基础的饮食（大米组），以及添加肉碱（100 ppm）的每种饮食. 实验周期为2周。与玉米饲喂相比，稻米饲喂导致显着更高的生长性能（体重增加和饲料效率）。添加肉碱也导致更高的生长性能。饲喂大米和饲喂添加肉碱日粮的肉鸡的胸肌和大腿肌肉重量 (g) 显着更高。与饲喂玉米的肉鸡相比，饲喂水稻的肉鸡肝脏 IGF-I 的 mRNA 表达显着更高。肌肉萎缩素-1 或肝脏 CPT-I 的 mRNA 表达在饲喂水稻和饲喂玉米的肉鸡之间没有显着差异，在饲喂含有或不含肉碱日粮的肉鸡之间没有显着差异。总体而言，这些结果表明，大米饲喂和添加肉碱可通过增加肝脏 IGF-I 的 mRNA 表达来改善肉鸡的生长性能。此外，肉毒碱的作用不受不同谷物（玉米和大米）的影响。