Table 2.

Ingredient, nutrient, and fatty acid composition (average ± SD) of treatment diets by trimester of gestation

Treatment1	LF			CAN			FLX
Trimester	Second	Third	Average ± SD	Second	Third	Average ± SD	Second	Third	Average ± SD
Ingredient, % DM
Grass hay	33.7 ± 2.56	36.4 ± 2.44	35.0 ± 2.84	27.2 ± 1.82	29.0 ± 2.27	28.1 ± 2.22	28.2 ± 2.82	29.9 ± 2.30	29.0 ± 2.73
Barley straw	38.3 ± 6.87	36.1 ± 2.33	37.3 ± 5.34	35.9 ± 8.38	33.7 ± 5.30	34.9 ± 7.17	33.4 ± 6.48	33.1 ± 1.74	33.3 ± 4.86
Barley grain	28.0 ± 7.48	27.5 ± 3.50	27.8 ± 5.94	7.45 ± 5.10	9.11 ± 1.77	8.23 ± 3.98	1.93 ± 2.29	4.38 ± 3.55	3.08 ± 3.19
CAN pellet	—	—	—	29.4 ± 4.18	28.2 ± 2.98	28.8 ± 3.71	—	—	—
FLX pellet	—	—	—	—	—	—	36.4 ± 7.43	32.6 ± 3.29	34.6 ± 6.15
Nutrient2, % DM
CP	10.3 ± 0.44	10.3 ± 0.56	10.3 ± 0.50	10.5 ± 0.32	10.7 ± 0.40	10.6 ± 0.37	10.6 ± 0.42	10.9 ± 0.37	10.7 ± 0.42
ADF	39.4 ± 3.01	39.4 ± 1.07	39.4 ± 2.31	39.5 ± 4.15	38.9 ± 2.40	39.2 ± 3.44	38.9 ± 3.22	38.7 ± 1.14	38.8 ± 2.46
NDF	58.5 ± 2.60	58.5 ± 0.57	58.5 ± 1.93	58.6 ± 4.73	58.1 ± 2.62	58.4 ± 3.88	56.9 ± 5.12	57.1 ± 1.42	57.0 ± 3.85
EE	1.35 ± 0.14	1.45 ± 0.07	1.40 ± 0.12	3.30 ± 0.20	3.32 ± 0.08	3.31 ± 0.16	3.29 ± 0.29	3.24 ± 0.15	3.27 ± 0.23
Calcium	0.44 ± 0.07	0.45 ± 0.05	0.45 ± 0.06	0.53 ± 0.05	0.51 ± 0.06	0.52 ± 0.06	0.46 ± 0.10	0.46 ± 0.07	0.46 ± 0.09
Phosphorus	0.25 ± 0.03	0.24 ± 0.02	0.25 ± 0.02	0.25 ± 0.01	0.25 ± 0.00	0.25 ± 0.01	0.24 ± 0.01	0.24 ± 0.01	0.24 ± 0.01
TDN	54.0 ± 2.87	54.0 ± 1.27	54.0 ± 2.26	54.9 ± 3.50	55.3 ± 2.04	55.1 ± 2.90	55.4 ± 2.80	55.4 ± 0.90	55.4 ± 2.13
NEm, Mcal/kg	1.09 ± 0.10	1.09 ± 0.04	1.09 ± 0.08	1.12 ± 0.12	1.14 ± 0.07	1.13 ± 0.10	1.14 ± 0.10	1.14 ± 0.03	1.14 ± 0.07
NEg, Mcal/kg	0.52 ± 0.09	0.53 ± 0.04	0.53 ± 0.07	0.56 ± 0.11	0.57 ± 0.06	0.56 ± 0.09	0.57 ± 0.09	0.57 ± 0.03	0.57 ± 0.07
Fatty acid3, % of total
16:0	28.2 ± 0.74	28.2 ± 0.66	28.2 ± 0.70	11.8 ± 1.36	12.7 ± 1.20	12.3 ± 1.36	11.5 ± 0.52	12.3 ± 0.46	11.9 ± 0.63
18:0	2.01 ± 0.19	2.06 ± 0.10	2.03 ± 0.16	2.07 ± 0.05	2.12 ± 0.13	2.09 ± 0.10	3.14 ± 0.15	3.18 ± 0.11	3.16 ± 0.13
c9-18:1	17.3 ± 0.90	16.1 ± 0.33	16.7 ± 0.91	47.6 ± 1.38	46.8 ± 0.83	47.2 ± 1.21	19.0 ± 0.42	19.1 ± 0.31	19.1 ± 0.37
c11-18:1	1.24 ± 0.05	1.20 ± 0.05	1.22 ± 0.05	3.59 ± 0.26	3.55 ± 0.13	3.57 ± 0.19	0.93 ± 0.03	0.94 ± 0.03	0.93 ± 0.03
18:2n-6	36.6 ± 0.51	37.2 ± 0.73	36.9 ± 0.70	22.4 ± 1.00	22.5 ± 0.65	22.5 ± 0.85	22.4 ± 1.20	22.9 ± 0.53	22.7 ± 0.98
18:3n-3	7.94 ± 0.54	8.35 ± 0.35	8.13 ± 0.50	7.93 ± 0.61	7.56 ± 0.99	7.76 ± 0.83	40.0 ± 1.33	38.3 ± 0.67	39.2 ± 1.34
∑SFA	34.7 ± 0.92	34.9 ± 0.70	34.8 ± 0.81	16.3 ± 1.36	17.5 ± 1.31	17.0 ± 1.34	16.4 ± 0.71	17.6 ± 0.52	17.1 ± 0.84
∑MUFA	20.7 ± 1.14	19.4 ± 0.33	20.1 ± 0.99	53.4 ± 1.55	52.3 ± 0.79	52.7 ± 1.32	20.9 ± 0.43	21.0 ± 0.27	21.0 ± 0.33
∑PUFA	44.6 ± 0.97	45.7 ± 0.78	45.1 ± 1.02	30.4 ± 0.67	30.2 ± 1.59	30.3 ± 1.20	62.4 ± 0.60	61.3 ± 0.32	61.9 ± 0.74

¹LF = low-fat diet; CAN = high-fat diet including canola seed-based pelleted feed; FLX = high-fat diet including flaxseed- based pelleted feed.

²EE = ether extract; TDN = total digestible nutrients. TDN was calculated using the Pennsylvania-State equations (Adams, 1980). NEm and NEg were calculated using the NRC (2000) summative equations.

³∑SFA = sum of saturated fatty acids; ∑MUFA = sum of monounsaturated fatty acids; ∑PUFA = sum of polyunsaturated fatty acids.