Effect of reduced energy density of close-up diets on dry matter intake, lactation performance and energy balance in multiparous Holstein cows

Table 2 Effect of energy density of close-up dry period diets on DMI and (NEI) in Holstein cows

Item	Dietary treatment¹			SEM	P-value
Item	HD	MD	LD	SEM	Diet	Time	Interaction
DMI, kg/d
Prepartum
Wk −3 to −1	14.3^a	13.6^b	12.6^c	0.14	<0.001	<0.001	0.87
Wk−1	12.3	11.8	11.1	0.29	0.22
H −48 to −25	10.9	11.0	9.6	0.46	0.37
H −24 to 0	5.0	5.6	6.3	0.61	0.7
Postpartum
Wk 1 to 5	18.8^b	19.1^ab	19.7^a	0.13	0.04	<0.001	0.37
H 0 to 24	10.5	10.4	11.1	0.82	0.95
H 25 to 48	11.9	12.1	12.6	0.7	0.93
Wk 1 to 3	17.9	18.1	18.3	0.18	0.86	<0.001	0.67
Wk 4 to 5	20.1^b	20.7^b	21.7^a	0.17	0.001	0.12	0.66
NEI, MJ/d
Prepartum
Wk −3 to −1	97.1^a	83.3^b	68.6^c	0.83	<0.001	<0.001	0.42
Wk −1	83.3^a	72.4^b	60.2^c	2.22	< 0.001
H −48 to −25	73.9^a	67.3^a	52.0^b	3.31	0.01
H −24 to 0	34.1	33.9	34.3	3.64	0.99
Postpartum
Wk 1 to 5	136.0^b	138.1^ab	142.3^a	0.95	0.03	<0.001	0.67
H 0 to 24	76.3	75.3	80.1	6.23	0.87
H 25 to 48	86.1	97.9	91.0	5.06	0.93
Wk 1 to 3	129.2	130.5	132.2	1.40	0.72	<0.001	0.9
Wk 4 to 5	145.2^b	149.4^b	156.9^a	1.25	0.001	0.12	0.64
NDF, kg/d
Prepartum
Wk −3 to −1	5.3^c	5.8^b	6.3^a	0.07	<0.001	<0.001	0.99
Wk −1	4.6^b	5.1^ab	5.5^a	0.14	0.03
H −48 to −25	4.1	4.7	4.8	0.20	0.32
H −24 to 0	1.9	2.4	3.1	0.28	0.19
Postpartum
Wk 1 to 5	6.0^b	6.1^ab	6.2^a	0.04	0.04	<0.001	0.40
H 0 to 24	3.3	3.3	3.5	0.26	0.95
H 25 to 48	3.8	3.9	4.0	0.22	0.95

¹HD high energy density diet, MD middle energy density diet, LD low energy density diet.
^{a, b, c}Values within a row with different superscripts differ significantly at P < 0.05.

ISSN: 2049-1891