اثرات استفاده از اسیدهای چرب امگا- 3، امگا-6 و مخلوط آن‌ها بر عملکرد، شاخص‌های اسکلتی و سلامت در گوساله های شیرخوار هلشتاین

این مطالعه به‌منظور بررسی اثرات استفاده از اسیدهای چرب امگا- 3، امگا-6 و مخلوط آن‌ها بر عملکرد، شاخص‌های اسکلتی و سلامت در گوساله های شیرخوار هلشتاین بود. تعداد 56 راس گوساله شیرخوار (نر و ماده) با میانگین وزن بدن 1.5 ± 38 کیلوگرم انتخاب و به‌صورت طرح کاملاً تصادفی به چهار گروه آزمایشی شامل: 1- شاهد (فاقد روغن)؛ 2- روغن سویا + شیر؛ 3- روغن ماهی + شیر و 4- ترکیب روغن سویا و روغن ماهی + شیر تقسیم شدند. شروع آزمایش 3 روزگی، از شیرگیری 75 روزگی و پایان دوره 80 روزگی بود. مصرف خوراک (استارتر + شیر) و افزایش وزن بدن به‌صورت روزانه برای هر گوساله به‌صورت مجزا انجام گردید. سنجش فاکتورهای رشد به وسیله مترسنج استاندارد در روزهای 3، 75 و 85 پرورش انجام شد و اسکور مدفوع و اسکور شادابی براساس شکل ظاهری (1 تا 5) بررسی و ثبت گردید. نتایج نشان داد مصرف خوراک و مصرف ماده خشک شیر با افزودن اسیدچرب امگا-3 و امگا-6 در بین گروه‌های آزمایشی تغییر معنی‌داری نداشت (0.05

the effects of using omega-3, omega-6 fatty acids and theirmixture on performance, skeletal and health indicators in nursing holstein calves

this study aimed to investigate the effects of using omega-3, omega-6 fatty acids and their mixtures on performance, skeletal indices and health in holstein calves. 56 suckling calves (male and female) with an average body weight of 38 ± 1.5 kg wereselected and divided into four experimental groups in a completely randomized design:1- control (oil-free); 2- soybean oil + milk; 3- fish oil + milk; and 4- combination of soybean oil and fish oil + milk. the experiment began at 3 days of age, weaning was at 75 days of age, and the end of the period was at 80 days of age. feed intake (starter + milk) and body weight gain were recorded daily for each calf separately. growth factors were measured using a standard meter on days 3, 75, and 85 of rearing, and stool scores and vitality scores were assessed and recorded based on appearance (1 to 5). the results showed that feed intake and milk solids intake did not change significantly among the experimental groups with the addition of omega-3 and omega-6 fatty acids (p > 0.05).no significant difference was observed in the average daily weight gain and body weight of calves compared to the control treatment, but daily weight gain was greater for soybean oil than for fish oil. feed intake efficiency for the experimental groups was not affected by the experimental treatments (p > 0.05). skeletal indices measured in this experiment were not significantly affected by the experimental treatments (p > 0.05).health indicators, including stool score and vitality score, were not affected by experimental treatments (p > 0.05). the use of polyunsaturated fatty acids from soybeanoil and fish oil not only had no adverse effects on calf performance, but also led to improvements in some growth factors and body weight.