نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه علوم دامی، دانشکدگان کشاورزی دانشگاه تهران، البرز، ایران
2 گروه علوم دامی، دانشکده کشاورزی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران
3 استادیار گروه شیمی، مرکز تحقیقات دارو رسانی نانو، دانشگاه آزاد اسلامی واحد کرمانشاه، کرمانشاه، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Background and Objectives: The development of nanotechnology has led to the production of zinc nanoparticles, which possess unique characteristics such as a wider contact surface, higher surface activity, higher catalytic efficiency and stronger absorption ability. This combination has the potential to improve the growth of rumen bacteria and enhance energy consumption. Therefore, the aim of this research is to investigate the effect of zinc nanoparticle supplementation on dry matter intake, milk composition and blood parameters in Holstein dairy cows.
Materials and methods: The number of 24 Holstein dairy cows with an average weight (650±20 kg) and the number of calving bellies (2 and more) and lactation days (70±4 days) during a 35-day trial period, 4 trial diets including. The treatments: 1) Basal Diet containing 30 mg/KgDM zinc oxide, 2) Basal Diet + containing 30 mg/KgDM ZnO-NPs, 3) Basal Diet + containing 60 mg/KgDM ZnO-NPs, and 4) Basal Diet + containing 90 mg/KgDM ZnO-NPs. The study followed completely randomized design Zinc nanoparticles were produced in the laboratory using the by co-precipitation method. The cows were milked and fed three times a day. Feed samples and residues were collected twice a week. Milk samples were collected weekly for three consecutive days. To measure, Milk composition, Blood samples were taken weekly two hours after the morning meal using a vacuum syringe from the tail vein to measure serum parameters.
Results: The results showed that the dry matter intake and the amount of milk production were not affected by the experimental diets (P>0.05). The number of body cells significantly decreased under the influence of ZnO-NPs nanoparticle consumption (P<0.05). They were not affected by the consumption of ZnO-NPs particles (P>0.05). Cows in the ZnO-NPs nanoparticle group showed higher concentration of SOD enzyme than the base group (P<0.05). Other compounds measured from the serum of cows were not significantly different among the experimental groups (P>0.05).
Conclusion: Overall, feeding zinc nanoparticles to dairy cows can be suggested as a solution to enhance of the dairy herd management.. The results showed that nano zinc sources in the diet of dairy cows were more suitable as a supplement compared to the mineral form of zinc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
کلیدواژه‌ها [English]
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