نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشگاه تهران
2 دانشکدگان کشاورزی و منابع طبیعی، کرج، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Background and Objectives: In the dairy cattle industry, the fertility trait is one of the most effective economic components, because the reduction of fertility prolongs the postpartum cycles and increases the costs of open days. Probiotics, prebiotics and microbial products such as bioactive peptides, enzymes and organic acids can be mentioned among the additives that affect reproduction. Probiotics are bacteria and yeast that are beneficial for the health of the body, especially the digestive system. New generation probiotics, besides yeasts, contain some bacteria, including types of bacilli, lactobacilli, streptococcus, etc., which are less studied. Recently, a supplement called Multiact D has been produced by Ariana Biotechnology Supplement Development Company, which claims to be effective on the health and reproductive performance of dairy cows. The aim of this study was to evaluate Multiact-D supplement containing prebiotic, probiotic and postbiotic (manufactured by Ariana Biotechnology Company) on milk production and composition, blood parameters and reproduction in Holstein dairy cows.
Materials and methods: Cows were studied in two groups of 50 treated rats (received 80 grams of Multiact supplement daily) and control between 20 and 100 days after calving. Once every month, the amount of milk produced and its ingredients were measured. Blood samples were collected on days 20, 40, 60, 80 and 100 from 9 cows in each group and blood parameters were analyzed. Reproductive traits include the number of days until the first insemination, the number of inseminations per pregnancy, the percentage of pregnancy compared to the first insemination and total inseminations (percentage of conception), the percentage of pregnancy up to 100 days of lactation, the percentage of pregnancy up to 120 days of lactation, the percentage of infertility at 200 days and days. Re-registered. SAS software was used to analyze reproductive data.
Results: The results showed that milk production, milk protein percentage, milk protein amount, milk lactose amount and body condition score were all increased in the treatment group, and milk fat percentage, total milk solids percentage, milk urea nitrogen decreased (0.5 0>P). Also, the concentration of total protein and iron increased in the treatment group, but the concentration of cholesterol and MDA decreased (P<0.05). In the treatment group, the percentage of pregnancy increased up to the 120th day of lactation and the number of open days decreased (P<0.05).
Conclusion: The use of Multiact-D supplement in the early lactation period had beneficial effects on the lactation performance and reproduction of Holstein P dairy cows. It also has effects on the concentration of blood parameters of Holstein dairy cows and reduces the level of oxidative stress.
کلیدواژهها [English]
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