نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه علوم دامی، دانشکده علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران
2 گروه علوم دام، دانشکده علوم دامی و شیلات، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران
3 گروه علوم دامی، دانشکده علوم دامی و شیلات، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this experiment 240 Ross 308 male broilers (from 1 to 24 days of age) were used in a randomized complete design with six treatments and 4 replicates and 10 chicks per replicate. Experimental diets included: Control diet based on corn and soybean meal, with recommended levels based on Ross strain guide, control diet with the addition of protease enzyme with recommended levels, Low protein diet, which has reduced about 5% of the protein level of the diet, Low protein diet with a decrease in the concentration of essential amino acids (about 5 percent), Low protein diet (Treatment 3) with addition of protease enzyme with recommended levels, Low protein diet with reduced essential amino acids by adding protease enzyme with recommended levels (0.02%).The highest amount of feed consumption in the initial period and the highest conversion rate in the growth period, as well as the highest percentage of abdominal fat, were related to the low protein and low amino acid diet without protease. Adding Protease increased the body weight and decreased the conversion factor during the growth period in low protein and low amino acid diets (P<0.05). The use of protease enzyme in low-protein diets improved the digestibility of dry matter and organic matter, and the highest percentage of thigh and spleen and blood HDL concentration was related to the low protein with the addition of protease enzyme (P<0.05). Based on the results, use of protease enzyme in low protein and low amino acid diets improved performance of broiler chicks.
کلیدواژه‌ها [English]
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