Table 2.

Effect of cyclic temperature treatment on feed intake of layer-type pullets.

Weeks	T22C	T24C	T26C	T28C	T30C	P value
Week 1	78.2 ± 1.2	76.9 ± 0.8	74.2 ± 2.7	77.1 ± 2.3	74.7 ± 1.6	0.509
Week 2	86.5 ± 1.6	80.2 ± 0.9	81.7 ± 2.0	81.9 ± 2.1	82.7 ± 1.0	0.108
Week 3	83.0 ± 1.9	80.8 ± 3.2	79.9 ± 3.0	75.6 ± 2.2	79.3 ± 0.7	0.281
Week 4	90.0 ± 2.5a	88.1 ± 1.2a	80.7 ± 1.2b	81.0 ± 1.5b	85.9 ± 1.0a	0.000
Week 5	87.5 ± 2.1	84.8 ± 1.5	80.0 ± 1.4	79.4 ± 3.5	83.4 ± 1.7	0.079
Week 6	85.7 ± 1.7a	82.3 ± 3.0a	82.0 ± 1.5a	71.6 ± 2.9b	80.9 ± 1.2a	0.002
Week 7	74.0 ± 4.5	94.3 ± 4.1	83.0 ± 5.8	80.3 ± 8.8	74.5 ± 4.5	0.130
Week 8	84.5 ± 2.3a,b	89.5 ± 2.0a	78.5 ± 3.6b	88.2 ± 5.0a	76.7 ± 1.7b	0.028
Average	83.7 ± 1.2a	84.6 ± 0.6a	76.9 ± 1.3b	76.9 ± 1.3b	79.6 ± 1.0b	0.000

Means with different superscript letters within the same line differ significantly, P < 0.05; data are presented as mean ± SE (n = 6).