BEAK TRIMMING BY INFRARED RADIATION OF LAYERS
ABSTRACT This study aimed at evaluating beak-trimming methods and intensities on the performance, beak length and uniformity, and egg parameters of commercial layers. During the rearing period, birds were distributed in randomized blocks, with a 2x3 factorial design + two treatments, consisting of b...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Fundação APINCO de Ciência e Tecnologia Avícolas
2019-04-01
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| Series: | Brazilian Journal of Poultry Science |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000100300&lng=en&tlng=en |
| _version_ | 1818204168748269568 |
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| author | K Pelicia EA Garcia TA Santos GC Santos JA Vieira Filho AP Silva J Moreira CBV Rabello RG Garcia |
| author_facet | K Pelicia EA Garcia TA Santos GC Santos JA Vieira Filho AP Silva J Moreira CBV Rabello RG Garcia |
| author_sort | K Pelicia |
| collection | DOAJ |
| description | ABSTRACT This study aimed at evaluating beak-trimming methods and intensities on the performance, beak length and uniformity, and egg parameters of commercial layers. During the rearing period, birds were distributed in randomized blocks, with a 2x3 factorial design + two treatments, consisting of beak trimming with infrared (IR) radiation (moderate or severe); three IR intensities (low: 42 nm, intermediate: 46 nm, or high: 52 nm); and two control hot blade (HB) beak trimming treatments (moderate or severe) with eight treatments and five replicates of 21 chicks each, totaling 840 birds. During the growing phase (second experiment) the factorial design was modified to 2 x 3 x 2 + 4, comprising two IR beak-trimming intensities (moderate or severe); three IR radiation intensities (low, moderate and high), second beak trimming at 11 weeks of age or not, and four additional HB beak-trimming treatments (moderate or severe) beak-trimming intensities, and second beak trimming at 11 weeks of age or not. There were 16 treatments with six replicates of seven birds each, totaling 672 laying hens, out of which 576 were selected for evaluation during the production period, with the same number of treatments and replicates of the previous phase. Weight gain (g), body weight (g), body weight uniformity (%), beak length (mm) and uniformity (%), absence of cannibalism (%), livability (%), egg production (%), feed intake (g), feed conversion per eggmass, eggmass, specific gravity, eggshell strength, Haugh unit, % yolk were evaluated. Beak trimming by infra-red radiation may be employed in commercial laying hens. |
| first_indexed | 2024-12-12T03:36:57Z |
| format | Article |
| id | doaj.art-7e60c3ff77914dde98c71b95f515d01c |
| institution | Directory Open Access Journal |
| issn | 1806-9061 |
| language | English |
| last_indexed | 2024-12-12T03:36:57Z |
| publishDate | 2019-04-01 |
| publisher | Fundação APINCO de Ciência e Tecnologia Avícolas |
| record_format | Article |
| series | Brazilian Journal of Poultry Science |
| spelling | doaj.art-7e60c3ff77914dde98c71b95f515d01c2022-12-22T00:39:47ZengFundação APINCO de Ciência e Tecnologia AvícolasBrazilian Journal of Poultry Science1806-90612019-04-0121110.1590/1806-9061-2017-0618S1516-635X2019000100300BEAK TRIMMING BY INFRARED RADIATION OF LAYERSK PeliciaEA GarciaTA SantosGC SantosJA Vieira FilhoAP SilvaJ MoreiraCBV RabelloRG GarciaABSTRACT This study aimed at evaluating beak-trimming methods and intensities on the performance, beak length and uniformity, and egg parameters of commercial layers. During the rearing period, birds were distributed in randomized blocks, with a 2x3 factorial design + two treatments, consisting of beak trimming with infrared (IR) radiation (moderate or severe); three IR intensities (low: 42 nm, intermediate: 46 nm, or high: 52 nm); and two control hot blade (HB) beak trimming treatments (moderate or severe) with eight treatments and five replicates of 21 chicks each, totaling 840 birds. During the growing phase (second experiment) the factorial design was modified to 2 x 3 x 2 + 4, comprising two IR beak-trimming intensities (moderate or severe); three IR radiation intensities (low, moderate and high), second beak trimming at 11 weeks of age or not, and four additional HB beak-trimming treatments (moderate or severe) beak-trimming intensities, and second beak trimming at 11 weeks of age or not. There were 16 treatments with six replicates of seven birds each, totaling 672 laying hens, out of which 576 were selected for evaluation during the production period, with the same number of treatments and replicates of the previous phase. Weight gain (g), body weight (g), body weight uniformity (%), beak length (mm) and uniformity (%), absence of cannibalism (%), livability (%), egg production (%), feed intake (g), feed conversion per eggmass, eggmass, specific gravity, eggshell strength, Haugh unit, % yolk were evaluated. Beak trimming by infra-red radiation may be employed in commercial laying hens.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000100300&lng=en&tlng=enAlternative beak-trimming methodsbeak-trimminginfrared radiationLohmann White layers |
| spellingShingle | K Pelicia EA Garcia TA Santos GC Santos JA Vieira Filho AP Silva J Moreira CBV Rabello RG Garcia BEAK TRIMMING BY INFRARED RADIATION OF LAYERS Brazilian Journal of Poultry Science Alternative beak-trimming methods beak-trimming infrared radiation Lohmann White layers |
| title | BEAK TRIMMING BY INFRARED RADIATION OF LAYERS |
| title_full | BEAK TRIMMING BY INFRARED RADIATION OF LAYERS |
| title_fullStr | BEAK TRIMMING BY INFRARED RADIATION OF LAYERS |
| title_full_unstemmed | BEAK TRIMMING BY INFRARED RADIATION OF LAYERS |
| title_short | BEAK TRIMMING BY INFRARED RADIATION OF LAYERS |
| title_sort | beak trimming by infrared radiation of layers |
| topic | Alternative beak-trimming methods beak-trimming infrared radiation Lohmann White layers |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000100300&lng=en&tlng=en |
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