Effect of a zinc amino acid complex on egg production, egg shell quality and external appearance in two laying hen genotypes housed in two different production systems
With an extended production cycle up to 100 weeks of age, the yearly number of layer chickens hatched and reared can be reduced, and in turn so can the euthanasia of day-old male chickens. Lately, the interest for keeping laying hens for a prolonged production cycle has increased in Sweden as wel...
| Autor principal: | |
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| Formato: | H2 |
| Lenguaje: | Inglés |
| Publicado: |
SLU/Dept. of Animal Nutrition and Management (until 231231)
2015
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| Materias: |
| _version_ | 1855571381115158528 |
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| author | Boyner, Malin |
| author_browse | Boyner, Malin |
| author_facet | Boyner, Malin |
| author_sort | Boyner, Malin |
| collection | Epsilon Archive for Student Projects |
| description | With an extended production cycle up to 100 weeks of age, the yearly number of layer
chickens hatched and reared can be reduced, and in turn so can the euthanasia of day-old male
chickens. Lately, the interest for keeping laying hens for a prolonged production cycle has
increased in Sweden as well as in other European countries. However, concerns exist
regarding how prolonged laying cycles affect egg quality, animal welfare as well as producer
economy. In this trial, the two commercial hybrids LSL Classic and Bovans Robust were
housed in furnished cages and a single tier floor production system. In addition to the effects
of age, an organic mineral complex with a hypothesized positive effect on egg quality,
integument and skeletal condition was evaluated. The study was conducted during 20-61
weeks of age. There were no consistent effects of the mineral amino acid complex
supplementation on either egg quality, plumage condition or keel bone deformities at a hen
age of 55 weeks. However, there were a lot of differences between hybrids regarding egg
composition and layer performance in the two production systems. As expected and
concluded in earlier research; egg shell quality, plumage condition and keel bone deformities
were negatively affected by increased hen age. |
| format | H2 |
| id | RepoSLU8615 |
| institution | Swedish University of Agricultural Sciences |
| language | Inglés |
| publishDate | 2015 |
| publishDateSort | 2015 |
| publisher | SLU/Dept. of Animal Nutrition and Management (until 231231) |
| publisherStr | SLU/Dept. of Animal Nutrition and Management (until 231231) |
| record_format | eprints |
| spelling | RepoSLU86152015-11-13T10:54:57Z Effect of a zinc amino acid complex on egg production, egg shell quality and external appearance in two laying hen genotypes housed in two different production systems Effekt av ett zinkaminosyrakomplex på äggproduktion, skalkvalitet och exteriör hos två värphönsgenotyper inhysta i två olika produktionssystem Boyner, Malin laying hens organic zinc aged layers egg shell quality egg quality animal welfare With an extended production cycle up to 100 weeks of age, the yearly number of layer chickens hatched and reared can be reduced, and in turn so can the euthanasia of day-old male chickens. Lately, the interest for keeping laying hens for a prolonged production cycle has increased in Sweden as well as in other European countries. However, concerns exist regarding how prolonged laying cycles affect egg quality, animal welfare as well as producer economy. In this trial, the two commercial hybrids LSL Classic and Bovans Robust were housed in furnished cages and a single tier floor production system. In addition to the effects of age, an organic mineral complex with a hypothesized positive effect on egg quality, integument and skeletal condition was evaluated. The study was conducted during 20-61 weeks of age. There were no consistent effects of the mineral amino acid complex supplementation on either egg quality, plumage condition or keel bone deformities at a hen age of 55 weeks. However, there were a lot of differences between hybrids regarding egg composition and layer performance in the two production systems. As expected and concluded in earlier research; egg shell quality, plumage condition and keel bone deformities were negatively affected by increased hen age. SLU/Dept. of Animal Nutrition and Management (until 231231) 2015 H2 eng https://stud.epsilon.slu.se/8615/ |
| spellingShingle | laying hens organic zinc aged layers egg shell quality egg quality animal welfare Boyner, Malin Effect of a zinc amino acid complex on egg production, egg shell quality and external appearance in two laying hen genotypes housed in two different production systems |
| title | Effect of a zinc amino acid complex on egg production, egg shell quality and external appearance in two laying hen genotypes housed in two different production systems |
| title_full | Effect of a zinc amino acid complex on egg production, egg shell quality and external appearance in two laying hen genotypes housed in two different production systems |
| title_fullStr | Effect of a zinc amino acid complex on egg production, egg shell quality and external appearance in two laying hen genotypes housed in two different production systems |
| title_full_unstemmed | Effect of a zinc amino acid complex on egg production, egg shell quality and external appearance in two laying hen genotypes housed in two different production systems |
| title_short | Effect of a zinc amino acid complex on egg production, egg shell quality and external appearance in two laying hen genotypes housed in two different production systems |
| title_sort | effect of a zinc amino acid complex on egg production, egg shell quality and external appearance in two laying hen genotypes housed in two different production systems |
| topic | laying hens organic zinc aged layers egg shell quality egg quality animal welfare |