Table 1.

The lactation parameters in sheep from the Group 1 (lambing in February–milked from April to August, Group 2 (lambing in June–milked from August to October), Group 3 (lambing in June–milked from August to November and melatonin-treated before 6 weeks parturition).

Parameters of Lactation	G1	G2	G3	SEM
Milk yield of the lamb-nursing period (liter)	63.2 B	61.08 B	44.62 A	10.8
Days of milking (days)	117 A	80 B	95 B	11.2
Length of lactation (days)	172 A,B	136 A,a	147 B,b	12.4
Milk production during lactation (liter)	37.8 A,B,a	30.2 A,b	29.2 B	9.3

Parameters of lactation: milk yield of the lamb-nursing period the number of milking days and the total length of lactation, total milking production—column header; G1—Group lambing in February (milked from April to August)–column header; G2—Group lambing in June (milked from August to October)–column header; G3—Group-lambing in June (milked from August to November and melatonin-treated before 6 weeks parturition)–column header; ^{a, b}—means within a row with different lowercase superscripts differ significantly at (p < 0.05); ^{A, B}—means within a row with different lowercase superscripts differ significantly at (p < 0.01).