فهرس المقالات starter diet

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  1 - Performance of Holstein Calves, Heifers and First-Lactating Cows Fed Starter Diets with Different Protein Levels and Types of Soybean Meal
  م.ر. فروزان‌مهر م. دانش-مسگران ع.ر. وکیلی
  Holstein calves were fed pelleted starter diets with crude protein (CP) concentrations of 18%, 22% and 24% per dry matter (DM) containing soybean meal (SBM) (SBM18, SBM20 and SBM24), respectively, for 10 weeks from 14 days of age. Another diet with a CP concentration of أکثر

  Holstein calves were fed pelleted starter diets with crude protein (CP) concentrations of 18%, 22% and 24% per dry matter (DM) containing soybean meal (SBM) (SBM18, SBM20 and SBM24), respectively, for 10 weeks from 14 days of age. Another diet with a CP concentration of 18% per DM was tested using commercial xylose-soybean meal (XSB; Yasminomax) instead of SBM. Each diet was fed to 24 calves and the feed consumption, nutrient intake, body weight (BW) gain, skeletal growth and selected blood metabolites were determined. Weaned animals were kept under observation for economic characteristics such as post-weaning (days 84 to 196) weight gain, withers height, weight at first heat, number of services per pregnancy and milk yield during first lactation. The average daily starter consumption was highest in calves fed SBM20. The average BW gain and total DM intake were highest in calves fed SBM20. Feed efficiency was highest in calves fed SBM24, but protein efficiency was highest in calves fed SBM20. A decreased blood glucose and increased blood insulin concentrations were observed in calves fed SBM18. Blood urea N and blood glucose were highest in calves fed SBM24. The service rate, age at first parturition and milk yield varied according to diet (p <0.001). تفاصيل المقالة
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  2 - The Effects of a Medical Plant Mixture and a Probiotic on Performance, Antioxidant Activity and Weaning Age of Newborn Holstein Calves
  ص. سیف زاده ف. میرزایی آقجه ح. عبدی بنمار ج. سیف دواتی ب. نوید شاد
  The aim of this study was to investigate the effects of a medical plant mixture and a probiotic on performance, antioxidant activity and weaning age of suckling Holstein calves. For this experiment, 30 newborn calves (0-10 days of age) with an average birth weight of 42 أکثر

  The aim of this study was to investigate the effects of a medical plant mixture and a probiotic on performance, antioxidant activity and weaning age of suckling Holstein calves. For this experiment, 30 newborn calves (0-10 days of age) with an average birth weight of 42 ± 8 kg were used in a factorial design (3×2) with 6 treatments and 5 replicates. Treatments were: 1) basal diet including a calves starter feed and whole milk, 2) control diet + 2 g probiotic 3) control diet + 1.5% of medical plant, 4) control diet + 1.5% medical plant + 2 g probiotic, 5) control diet + 3% medical plant and 6) control diet + 3% medical plant + 2 g probiotic. The calves were offered experimental pelleted feeds ad libitum and after one month were supplied with imported hay. Results showed that the treatments had no significant effect on dry matter intake during the experiment. However, addition of the 1.5% medical plant increased dry matter intake (P<0.05). However, the 1.5% level of medical plant reduced calves weaning age (P<0.05). Calves receiving control diet + 1.5% of medical plant mixed and 1.5% medical plant mixed + 2 g probiotic showed a higher plasma antioxidant activity (P<0.05). This study suggested that 1.5% of medical plant in calves starter feed will improve performance and the immune system and will also reduce the weaning age of calves. تفاصيل المقالة