Effects of far-off and close-up transition cow feeding on uterine health, postpartum anestrous interval, and reproductive outcomes in pasture-based dairy cows

Table 1 Effects of far-off and close-up feeding strategies on reproduction performance in seasonal calving cows

Treatments	Far-off^a			Close-up^b				P values
Groups	Controlfed	Overfed	SEM	Feed65	Feed90	Feed120	SEM	Far-off	Close-up	Interaction^c
Postpartum anoestrus interval, d ^d	31	31	1.6	34	33	28	1.9	0.80	0.07	< 0.02
3-week submission rate, %	91	93	3.4	90	94	92	4.3	0.99	0.99	0.75
Conception rate to first mating, %	44	61	5.8	46	57	55	7.1	< 0.05	0.75	0.64
Conception rate during first 3 weeks of mating, %	47	64	6.1	44	61	62	7.5	0.05	0.42	0.36
Conception rate during the first 6 weeks of mating, %	63	83	5.9	67	76	77	7.1	< 0.02	0.51	0.05
3-week pregnancy rate, %	43	60	5.8	40	57	57	7.1	0.06	0.37	0.33
6-week pregnancy rate, %	60	79	5.7	64	74	71	6.9	0.02	0.46	< 0.05
Final pregnancy rate, %^e	79	91	4.8	82	90	82	5.5	0.10	0.47	0.69

^aFar-off Controlfed (Controlfed) were fed to gain BCS during late lactation and maintain BCS during the far-off non-lactating period. Far-off Overfed (Overfed) were fed to maintain BCS during the late lactation and gain BCS during the far-off non-lactating period [13]
^bClose-up treatments were managed to achieve daily ME intakes equivalent to 65%, 90% and 120% of their requirements (Feed65, Feed90, Feed120) during the 3 weeks pre-calving [13, 16]
^cInteractions are detailed in Fig. 3a-c
^dInterval from calving to d 1 of the two consecutive d that progesterone was > 1.95 ng/mL
^eMating period was 70 d (artificial insemination 39 d, 31 d natural bull mating)

ISSN: 2049-1891