Effects of organic chromium and energy source on performance of Holstein dairy cows during the transition period
Author(s):
Abstract:
Thirty-two multiparous Holstein cows were used to investigate the effects of chromium-l-methionine (Cr-Met) supplementation and dietary energy source on performance and lactation during the Transition period. Cows were fed a total mixed ration consisting of two energy source from 28 d before anticipated calving through 28 d after calving. The Cr-Met was supplemented at dosages of 0 or 0.08 mg of Cr/kg of metabolic body weight. The study was designed as a randomized complete block design with 2 (Cr-Met levels) × 2 (energy sources) factorial arrangement. Fish oil Supplementation had no significant effect on prepartum dry matter intake (DMI) but decreased postpartum DMI. Supplemental Cr-Met increased prepartum and postpartum DMI. The effect of treatments on milk production was not significant. No differences were detected in milk composition except for fat percentage; in which cows were fed the fish oil had lower percentage of fat compared to others. Ammonia–N concentration was not affected by treatments. The molar proportion of acetate and butyrate were significantly decreased when fish oil was added to the diets.
Keywords:
Language:
Persian
Published:
Animal Sciences Journal, Volume:28 Issue: 107, 2015
Pages:
25 to 32
magiran.com/p1453228
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 1,390,000ريال میتوانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!