Effects Of Light Time On Performance In Broiler Breeder Before Producing First Egg

Parent flock Avian broiler breeders were used and the eighteen weeks to twenty-five weeks light time acted as the factors in this study, we took the randomized block design. We designed five treatment groups and each treatment group used one henhouse in five henhouses randomly. The control group is the light regime of parent flock Avian broiler breeder and the treatment groups are compounding which had dealt with different light time. The other treatments is expressed as following, from the eighth week to the twenty-forth week, the treatment one is 8, 10, 11 12, 13 14, 15, treatment two is 8, 10, 10, 12, 13, 14, 15; treatment three is 8, 11, 11, 12, 12, 13, 14 and treatment four is 8, 12, 13, 14, 15, 15, 15, in addition, the four treatments have the same light time from twenty-fifth week to sixty-seventh week. The total quantities in the henhouses were 8868 individuals and it had three repeats in each grouping that included 2976 individuals in each repeat. At last, we noted the age to producing first egg in each group, laying rate, egg weigh, fecundation rate, produced qualified egg counts in each group on every week. The results showed as follow: (l)To the age to producing first egg, the second treatment group was 172 days and it had differ significantly (P<0.05) or terribly significantly different (P<0.01) on the others. The outcome accorded with the standard of the age to producing first egg in Avian broiler breeder (169-175 days): (2)To laying rate of the whole process, the highest group was the second treatment group, it had differ significantly on the control and the first treatment groups(P<0.05), and had terribly significantly different on the third and four treatment groups (P<0.01); (3)To average fecundation rate of the whole process, it had not differ significantly among the every groups; (4)To average produced qualified egg counts of the whole process, the highest group was the second treatment group, it had differ significantly on the first and third treatment groups(P<0.05) and terribly significantly different on the control and the four treatment groups (P<0.01); (5)To average egg weigh, the highest group was the control group, it was differ significantly on the third and four treatment groups (P<0.05), but did not differ significantly on the first and second treatment groups. The results marked that the different light regime could produce the different degree effects on the age to producing first egg, laying rate, produced qualified egg counts, egg weigh and had indistinctively influence on fecundation rate. According to these results, we considered the second treatment group has the best light time.