Table 2.

Analyzed chemical composition (g/kg DM or as stated) of experimental total mixed ration

Items	Timothy1)		Ryegrass2)
	High starch	High fiber	High starch	High fiber
DM (g/kg as fed)	886	885	872	876
OM	933	926	938	938
CP	131	142	134	145
SOLP	56	58	62	69
NDICP	12	18	13	16
ADICP	9	11	10	11
Dietary aNDF	388	401	374	395
Roughage aNDF	208	156	180	128
ADF	231	230	220	221
ADL	40	39	39	40
Ether extract	36	40	37	36
Ash	67	74	62	62
Ca	7	9	8	8
P	4	4	4	5
K	14	14	11	11
Na	2	3	3	3
Cl	8	9	8	8
S	3	3	3	3
Mg	2	3	2	3
TDN	699	695	710	703
NEm (MJ/kg DM)	6.7	6.6	6.9	6.8
NEg (MJ/kg DM)	4.2	4.1	4.3	4.2
Total carbohydrates	766	745	767	757
NFC	389	362	406	377
Carbohydrate fraction3) (g/kg carbohydrate)
CA	84	80	69	58
CB1	331	302	378	358
CB2	94	105	83	83
CB3	368	387	348	374
CC	124	127	123	126
Protein fraction4) (g/kg CP)
PA+B1	428	412	460	476
PB2	483	460	444	413
PB3	23	53	21	35
PC	67	75	75	76

DM, dry matter; OM, organic matter; CP, crude protein; SOLP, soluble CP; NDICP, neutral detergent insoluble CP; ADICP, acid detergent insoluble CP; aNDF, neutral detergent fiber analyzed using a heat stable amylase and expressed inclusive of residual ash; ADF, acid detergent fiber; ADL, acid detergent lignin; TDN, total digestible nutrients; NEm, net energy for maintenance; NEg, net energy for growth; NFC, non-fiber carbohydrate.

¹⁾Contained 878 g/kg DM and 928 g/kg OM, 71 g/kg CP, 649 g/kg aNDF, 533 g/kg TDN, and 4.9 MJ/kg NEm on DM basis.

²⁾Contained 890 g/kg DM and 937 g/kg OM, 44 g/kg CP, 751 g/kg aNDF, 507 g/kg TDN, and 4.5 MJ/kg NEm on DM basis.

³⁾CA, carbohydrate A fraction, ethanol soluble carbohydrates; CB1, carbohydrate B1 fraction, starch; CB2, carbohydrate B2 fraction, soluble fiber; CB3, carbohydrate B3 fraction, available insoluble fiber; CC, carbohydrate C fraction, unavailable carbohydrate.

⁴⁾PA+B1 protein A and B1 fractions, soluble CP; PB2, protein B2 fraction, intermediate degradable CP; PB3, protein B3 fraction, slowly degradable fiber-bound CP; PC, protein C fraction, unavailable CP.