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.

Highlights

  • IntroductionThe main reason for the implementation (application) forced (forced) molting hens the extension of their production period, usually 69 weeks at 105 to 110 weeks of hen

  • The main reason for the implementation forced molting hens the extension of their production period, usually 69 weeks at 105 to 110 weeks of hen

  • Indicators - The number and mortality of hens Number of layers at the beginning of the first production cycle Number of hens with 48 weeks of age - pre moulting (30 weeks of production) Mortality hens to 48 weeks of age the number of inhabited Number of hens after the first production cycle (53 weeks) Mortality from 19 to 71 weeks of age - 53 weeks of prod

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Summary

Introduction

The main reason for the implementation (application) forced (forced) molting hens the extension of their production period, usually 69 weeks at 105 to 110 weeks of hen. This rule increases the cost of the respective type of production, reduce the costs of procurement 18 weeks, while the market is continuously supplied eggs for consumption (Anderson, 2016a; Elson and Croxall, 2006; Senčić i Butko, 2006; Hassanien, 2011; Radovic , 2011; Pandurevic, 2011; Maslić- Strižak, 2012; Zemcov, 2015). In the end, found influence of age on the intensity of load hens eggs in different stages of the production cycle (before and after the forced molting hens) by calculating the correlation coefficients of phenotypic correlation

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