نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه تغذیه داموطیور، دانشکده علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران.
2 گروه تغذیه دام طیور، دانشکده علوم دامی، دانشگاه علوم کشاورزی منابع طبیعی گرگان، گرگان، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In the present study, 30 newborn calves with an average weight of 42.55 ± 0.98 kg were used in a completely randomized design with 5 treatments and 6 replicates over a period of 42 days. The yeasts were mixed with milk and fed to the calves in the morning. The experimental diets were as follows: 1- control diet (without yeast), 2- 2.5 grams of live yeast, 3- 5 grams of live yeast, 4- 2.5 grams of inactive yeast, and 5- diet containing 5 grams of inactive Saccharomyces cerevisiae per calf per day. The calves were fed milk twice daily, in the morning and evening. Every 21 days, the calves were weighed, and skeletal indices were measured. Ruminating behavior and blood sampling were determined at the end of the period, and fecal score was recorded daily as a health indicator. Statistically, feed intake, feed conversion ratio, daily weight gain, and fecal consistency were significant throughout the period. Among the experimental treatments, significant differences were observed in the digestibility of nutrients except for dry matter . The use of live and inactive Saccharomyces cerevisiae in the dietary treatments significantly affected feeding behavior, including ruminating, eating, drinking, and abnormal behavior in standing and lying positions (P < 0.05). Blood glucose, cholesterol, protein, albumin, and creatinine levels were significantly affected by different levels of live and inactive Saccharomyces cerevisiae . In general, no significant differences were observed between the live and inactive Saccharomyces cerevisiae treatments in terms of performance, blood parameters, and fecal consistency.
کلیدواژه‌ها [English]
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