TY - JOUR JO - Journal of Animal and Feed Sciences J2 - J. Anim. Feed Sci. SN - 1230-1388 VL - 16 IS - Suppl. 2 PY - 2007 ID - Zhang2007 TI - Effects of processing maize grains and soyabean on rumen fermentation and development of Holstein bull calves AB - A feeding trial using 12 Holstein bull calves (21±3 d) was conducted to investigate the effect of different processed maize grain and full fat soyabean included in the starter diets on their rumen fermentation and development. Three treatment starter diets contained different processed maize grain and soyabean: steam-flaked maize and soyabean (SFMS), extruded maize and soyabean (EMS), and ground maize and raw soyabean (GMS). During 10-week trial, total rumen VFA concentration tended to be influenced by different processing methods at wk 6 and 9 (P<0.10). The molar proportion of butyrate for calves receiving SFMS starter diets was higher than that of EMS and GMS starter diets (P<0.05) at wk 5 and 11. Rumen papillae development characteristics expressed by papilla length, papilla width and rumen wall thickness were remarkably different among treatment starter diets (P<0.05). AU - Zhang, Y. Q. AU - Deng, X. Z. AU - Zhou, Z. M. AU - Ren, L. P. AU - Meng, Q. X. SP - 525 EP - 530 DA - 2007 DO - 10.22358/jafs/74599/2007 UR - https://doi.org/10.22358/jafs/74599/2007 ER -