نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه علوم دامی, دانشکده علوم دامی و شیلات، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران
2 گروه علوم دامی، دانشکده علوم دامی و شیلات، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران
3 گروه علوم دامی، دانشکده علوم دامی و شیلات،دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
This study was conducted to evaluate the effects of acid hydrolyzed processing on the nutritional value of soybean meal (SBM) and influence of the acid-hydrolyzed SBM on the growth performance, intestinal morphology, microbial population, digestive enzymes activity, and nutrient digestibility in broiler chicks fed with diets containing different levels of crude protein. A total of 300 one-day-old male broiler chickens were used in a design with 6 treatments and 5 replicates per each during 1 to 42 days of age. This experiment was conducted as a rendomozed completely designed with a 2 × 3 factorial arrangement of treatments including two types of SBM (raw and treated with 0.50% citric acid) and three inclusion rates of crude protein (100, 95 and 90% of requirements). The results showed that acid-treated SBM improved feed conversion ratio in broilers compared with raw-SBM group (P < 0.05). The decrease of protein requirements up to 90% declined growth performance of broilers compared to 95 and 100 % of requirements (P < 0.05). Acid processing of SBM increased digestibility coefficient of crude protein and protease and amylase activity in broiler chickens (P < 0.05). A decrease in protein digestibility and enzyme activity was observed in broilers fed low protein (90 % of the requirements) diet (P < 0.05). It can be concluded that acid processing of SBM improved its nutritional quality. A. In addition, reduction of crure protein requirements up to 95% in diets containing citric acid-treated SBM had no negetave impact on performance in broiler chicks.
کلیدواژه‌ها [English]
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