نوع مقاله : مقالات علمی- پژوهشی
نویسندگان
1 گروه علوم دامی، دانشکده کشاورزی، دانشگاه صنعتی اصفهان، اصفهان، ایران
2 گروه علوم دامی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In order to examine the effect of using rumen protected methionine (Mepron, Evonik Industries, Hanau, Germany) on productive and reproductive performance under field condition, 195 Holstein cows were used in a unbalanced completely randomized design and 2 groups. Experimental treatments consisted of: 1) control group with 110 Holstein dairy cows (71±51 DIM and 47.5±12 milk yield) and without Mepron and 2) experimental group with 85 Holstein dairy cows (85±59 DIM and 47.0±12 milk yield) and 13 g Mepron per cow/d. Cows were group fed with TMR and 4 times a day. The diets were balanced with AminoCow® software. Using Mepron decreased CP content from 17.05% in control group to 16.47% in experimental group, while other nutrients were similar between two diets. Adding Mepron to diet resulted in a significant increase in dry matter intake (P
کلیدواژهها [English]
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