Table 5 Effects of different nutritional protocols on rumen morphometrics of Nellore yearling bulls differing in EPD for marbling.

Item	FGC	FGC	HMC	HMC	HMC	SEM¹	Contrasts (P-value)
Item	CSFA−	CSFA+	CSFA−	CSFA+	CSFA + Zn + Cr	SEM¹	Corn	CSFA	Corn*CSFA	ZnCr	EPD*Trt
Rumenitis, %	9.60	7.29	11.17	9.89	9.83	0.814	0.01	0.04	0.54	0.96	–
Mean papillae area, cm²	0.45	0.41	0.39	0.48	0.44	0.022	0.96	0.22	0.01	0.15	0.03
ASA², cm²/cm² of rumen wall	20.67	19.48	18.18	21.86	19.26	0.690	0.93	0.08	0.00	0.01	< 0.01
Number of papillae, n	47.40	46.48	46.99	44.41	42.02	1.229	0.40	0.25	0.58	0.04	< 0.01
Papillae area, % of ASA	94.98^a	94.90^a	94.56^b	95.57^a	94.95	0.256	0.64	0.08	< 0.05	0.08	–

Finely ground corn (FGC); High moisture corn (HMC); Finely ground corn associated with calcium salts of fatty acids (FGC + CSFA); high moisture corn associated with calcium salts of fatty acids (HMC + CSFA); high moisture corn associated with calcium salts of fatty acids and organic Zinc and Chromium (HMC + CSFA + ZnCr).¹ standard error of mean; ² absorptive surface area.

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