Abstract:
This study was conducted to investigate the in vivo effect of geographically different originated corn grains in ruminal fermentation and blood metabolites of Holstein steers fed total mixed ration (TMR) as a basal diet to explain fundamental data of corn grain for cattle in Republic of Korea. Four ruminally cannulated Holstein steers (body weight 746 ± 32.8 kg) fitted with 100 mm i.d. ruminal cannula in a 4 × 4 Latin square experiment fed TMR as a basal diet were housed under the condition of temperature humidity index (THI) 71.5 (no stress, 24 °C and 60%). Treatments were TMR with, 5.0% of dry matter (DM) intake; Korean low (KL), 10.0%; Korean high (KH) of Korean corn grains and 6.0%; American low (AL), 11.0%; American high (AH) of American corn grains respectively. To measure the ruminal pH, ammonia, and volatile fatty acids (VFA), ruminal digesta was sampled through ruminal cannula at 1 h intervals after the morning feeding to determine ruminal fermentation characteristics. Blood was sampled via the jugular vein after the ruminal digesta sampling. There was no difference in dry matter (DM) intake of Korean and American corn grains because DM intake was restricted to 1.66% of body weight. Ruminal pH was significantly higher for KL and total VFA concentration for KH were noted along with iso-valerate and caproic acid. There was no change on mean ammonia. Concentration of blood metabolites were not affected by the treatments. Feeding KH may increase feed digestion in the rumen, whereas the KL treatment appeared to attain inadequate corn retention time for the microbial degradation in the rumen. Meanwhile, AL and AH has shown similar digestion kinetics, but production parameters will give more clear results.
Page(s):
65-65
DOI:
DOI not available
Published:
Journal: Abstract Book on International Conference on Food and Applied Sciences (ICFAS-23) 3-5 August 23, Volume: 0, Issue: 0, Year: 2023