Table 6.

Calving distribution (% of heifers that calved) of heifers grazing bahiagrass pastures and randomly assigned, in a 2 × 2 factorial arrangement of treatments, to receive concentrate DM supplementation at 1.25% or 1.75% of BW offered either daily (7×) or 3× weekly (3×; Monday, Wednesday, and Friday) from days 0 to 168 (2 yr; 64 heifers/yr; 4 pastures/treatment combination/yr)

	Day of the study
Calving distribution, % of heifers that calved	363	370	377	384	391	398	405	412	419	426	433	SEM	P-value
Supplementation amount
1.25% of BW	5.6	11.1	27.8	51.4	75.7	81.9	88.2	88.2	93.8	93.8	100.0	5.92	0.05
1.75% of BW	22.5	30.8	53.3	67.5	81.7	85.8	95.8	100.0	100.0	100.0	100.0	5.92
P-value	0.05	0.04	0.02	0.05	0.57	0.71	0.47	0.26	0.55	0.55	1.00
Supplementation frequency
3×	10.0	10.0	20.0	42.5	71.3	77.5	93.8	93.8	93.8	93.8	100.0	5.73	0.04
7×	18.1	31.9	61.1	76.4	86.1	90.3	90.3	94.4	100.0	100.0	100.0	5.73
P-value	0.45	0.04	0.001	0.002	0.05	0.23	0.74	0.95	0.55	0.55	1.00

¹Effects of supplementation amount × day of the study (P = 0.05) and supplementation frequency × day of the study (P = 0.04) were detected for calving distribution.

² P-value for the comparison of treatments within day of the study.