Impact on productivity of forced molt and duration of production cycle of commercial laying hens held in cage systems

Abstract

The main objective of this study was to analyze the results of table egg production Lohmann Brown hybrid chickens before and after forced moulting, or study of the impact of forced molting on productivity and the duration of its lifetime hens. The surveys cover three periods, namely: - the first production of eggs in the first year (from 19 -71. Weeks of age hens); the second - moulting period (from 72 -76. Sunday); the third - after the forced molting period (from 77 -106. weeks of age hens). The experiment was conducted on a total of 44,400 commercial laying hens reared in a cage system, 'enriched' cages, family farm 'Rakic-Commerce' (Batkovic, Bijeljina, Republic of Serbian, BiH). From 19 to 48 weeks of age with a hen housed load intensity was 85,11%, from 19 to 71 weeks of age to 82.49%, while the second phase capacity uu after moulting after laying hen housed intensity of the load was 74.36%. From 19 to 48 weeks of age mortality rate was 4.21%, up 8.47% 71 weeks, during moulting 1.35%, from 77 to 106 weeks of age 3.24%. Between the age of hens and intensity of capacity in the first 30 weeks egg production was determined by the mean positive correlation connection (rp = 0.470) (P <0.01). In other phases of the production cycle of these indicators did not exist or were very weak negative correlation.

Keywords

• force molting
• laying hen
• hens age
• intensity of load
• mortality
• production ages hens