Comparison of acid-detergent lignin, alkaline-peroxide lignin, and acid-detergent insoluble ash as internal markers for predicting fecal output and digestibility by cattle offered bermudagrass hays of varying nutrient composition

Table 3 Concentration (g/kg dry matter, DM) of internal markers in consumed bermudagrass hays of varying crude protein (CP) concentrations and associated feces (n = 6)

Item²	Treatments¹				SEM³	P-value
	L	ML	MH	H
ADL_fd	43^a	32^b	32^b	38^a	1.9	0.01
ADL_fc	93	85	87	94	2.6	0.06
APL_fd	26	24	22	25	1.2	0.16
APL_fc	59	53	52	60	4.6	0.17
ADIA_fd	25^b	32^a	27^b	20^c	2.8	0.01
ADIA_fc	51^b	65^a	60^a	54^b	4.2	0.01

¹L, low CP hay (CP = 79 g/kg DM); ML, medium low CP hay (CP = 111 g/kg DM); MH, medium high CP hay (CP = 131 g/kg DM); and H, high CP hay (CP = 164 g/kg DM).
²ADL_fd, acid-detergent lignin in the forage; ADL_fc, acid-detergent lignin in feces; APL_fd, alkaline-peroxide lignin in the forage; APL_fc, alkaline-peroxide lignin in feces; ADIA_fd, acid-detergent insoluble ash in the forage; ADIA_fc, acid-detergent insoluble ash in feces.
³SEM, standard error of the mean.
^abcMeans within a row without a common superscript letter differ at P < 0.05.

ISSN: 2049-1891