. 2019 Dec 30;99(1):364–373. doi: 10.3382/ps/pez502

Table 3.

Effect of various levels of vitamin D₃, vitamin D₂, and 25-OHDroxyvitamin D₃ (25-OHDOHD) on feed intake/bird/day of laying hen at late stage of egg production measured each week during 6 wk of study.

	(Feed intake (g)/hen/d)
	Week
Treatment	0	1	2	3	4	5	6
Control¹	97.07	98.98^a,b	98.67^a,b	102.28^a,b	93.51	102.72^a	98.82^a,b
Control + 3,000 IU OHD	85.95	91.41^a,b	92.61^a,b	95.62^a,b	89.5	110.00^a	93.10^a–c
Control + 9,000 IU OHD	84.85	96.51^a,b	93.05^a,b	95.03^b	88.84	101.66^a	90.11^b,c
Control + 3,000 IU D₃	86.25	96.78^a,b	98.29^a,b	103.21 ^a	94.09	105.82^a	99.48^a,b
Control + 9,000 IU D₃	92.26	94.20^a,b	97.84^a,b	99.58^a,b	93.33	103.10^a	94.69^a–c
Control + 3,000 IU D₂	102.94	105.05^a	104.70^a	107.80^a	97.86	109.65^a	101.96^a
Control + 9,000 IU D₂	80.85	87.97^b	90.85^b	90.34^b	85.1	99.10^a	90.11^c
SEM²	5.82	3.491	2.745	2.89	2.97	6.41	2.361
P value³	0.13	0.043	0.018	0.003	0.091	0.769	0.0005

^a–c

Means with different superscripts within a column differ significantly (P < 0.05).

Control diet contains 3,000 IU/kg of vitamin D₃ in the diet.

SEM, standard error of the mean.

P values from 1-way ANOVA and Tukey's test.