Effects of ambient temperature and rumen–protected fat supplementation on growth performance, rumen fermentation and blood parameters during cold season in Korean cattle steers

Autor: Kang, Hyeok Joong, Piao, Min Yu, Park, Seung Ju, Na, Sang Weon, Kim, Hyun Jin, Baik, Myunggi
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Asian-Australasian Journal of Animal Sciences, Vol 32, Iss 5, Pp 657-664 (2019)
Asian-Australasian Journal of Animal Sciences
ISSN: 1976-5517
1011-2367
Popis: Objective This study was performed to evaluate whether cold ambient temperature and dietary rumen-protected fat (RPF) supplementation affect growth performance, rumen fermentation, and blood parameters in Korean cattle steers. Methods Twenty Korean cattle steers (body weight [BW], 550.6±9.14 kg; age, 19.7±0.13 months) were divided into a conventional control diet group (n = 10) and a 0.5% RPF supplementation group (n = 10). Steers were fed a concentrate diet (1.6% BW) and a rice straw diet (1 kg/d) for 16 weeks (January 9 to February 5 [P1], February 6 to March 5 [P2], March 6 to April 3 [P3], and April 4 to May 2 [P4]). Results The mean and minimum indoor ambient temperatures in P1 (−3.44°C, −9.40°C) were lower (p0.05). Ruminal ammonia nitrogen concentrations were higher (p
Databáze: OpenAIRE