Eight abomasally fistulated steers were fed on diets of either ground, cracked or whole shelled maize at equalized intakes. Dry matter disappearance as a percentage of dietary intake averaged 73.1, 69.9 and 65.1 for steers fed ground, cracked and whole shelled maize, respectively, but these differences were not significant (P > 0.05). Total abomasal N tended to be lower in steers given cracked maize; however, this difference was nonsignificant. Abomasal nonprotein N was somewhat lower, and protein N tended to be higher with ground maize, these differences also being nonsignificant. Cracked maize resulted in slightly greater amounts of abomasal nonprotein N and lower amounts of protein N. Plasma urea-N was highest in steers fed on cracked maize. Concentrations of abomasal amino acids were not significantly (P > 0.05) affected by the form of the maize. Of the plasma amino acids, lysine and alanine were significantly higher (P < 0.05) with cracked maize and glutamic acid was significantly higher (P < 0.01) with whole shelled maize. Total essential amino acids were significantly (P < 0.05) higher with cracked maize. The ratios of glycine to the branched-chain amino acids (valine, leucine and isoleucine) in either plasma or abomasal digesta were similar for ground, cracked or whole shelled maize.
|Number of pages||9|
|Journal||Animal Feed Science and Technology|
|State||Published - Sep 1977|
ASJC Scopus subject areas
- Animal Science and Zoology