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Feed Efficiency, gr...
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Rezaei, MehdiSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjursgenetik (HGEN),Department of Animal Breeding and Genetics
(författare)
Feed Efficiency, growth performance, and carcass characteristics of a fast- and a slower-growing broiler hybrid fed low- or high-protein organic diets
- Artikel/kapitelEngelska2018
Förlag, utgivningsår, omfång ...
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2017-02-24
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Springer Science and Business Media LLC,2018
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Springer Verlag (Germany),2024
Nummerbeteckningar
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LIBRIS-ID:oai:slubar.slu.se:88703
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https://res.slu.se/id/publ/88703URI
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https://doi.org/10.1007/s13165-017-0178-6DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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Organic poultry meat production in Sweden is characterized by diets based on organic and locally produced feedstuffs, roughage allowance, a long rearing period (>10 weeks), outdoor access for the birds, and ban of synthetic amino acids and prophylactic use of antibiotics and anthelmintic. Until recently, the main hybrids used in organic broiler chicken production in Sweden were the same as used in conventional broiler chicken production. These birds are bred to reach market weight at 5 to 6 weeks on a high-protein quality nonorganic diet. In this study, organic high- and low- protein diets were fed to fast- and slower-growing hybrid broiler chickens with 5 pens per genotype × diet treatment and 21 to 22 broiler chickens per pen. Weight gain, feed conversion, health, and mortality were recorded during a 71-day rearing period. The fast-growing hybrid birds grew faster (55.4 ± 0.7 versus 38.3 ± 0.5 g/day, P = 0.001) and had a better feed conversion ratio (2.6 ± 0.1 versus 2.9 ± 0.1 kg feed/kg body weight, P = 0.001) than the slower-growing hybrid birds. The fast-growing hybrid birds grew slower when fed the high-protein compared to the low-protein diet (55.3 ± 0.5 versus 57.8 ± 1.4 g/day, P = 0.050), while the slower- growing hybrid birds grew faster when fed the high-protein compared to the low-protein diet (39.4 ± 0.7 and 37.2 ± 0.4 g/day, P = 0.038). A higher proportion of fast- compared to slower-growing hybrid birds had sticky droppings at 1 week of age (18.8 ± 1.6 versus 3.8 ± 1.6%, P = 0.001) and were culled because of leg weakness during the 10-week rearing period (10.0 ± 2.0 versus 3.3 ± 2.0%, P = 0.031), indicating poorer welfare among fast-growing hybrid birds when reared for 10 weeks on organic diets.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Yngvesson, JennySwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjurens miljö och hälsa (HMH),Department of Animal Environment and Health(Swepub:slu)46787
(författare)
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Gunnarsson, StefanSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjurens miljö och hälsa (HMH),Department of Animal Environment and Health(Swepub:slu)47397
(författare)
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Jönsson, LottaSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjursgenetik (HGEN),Department of Animal Breeding and Genetics(Swepub:slu)51028
(författare)
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Wallenbeck, AnnaSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjurens miljö och hälsa (HMH),Institutionen för husdjursgenetik (HGEN),Department of Animal Environment and Health,Department of Animal Breeding and Genetics(Swepub:slu)51035
(författare)
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Sveriges lantbruksuniversitetInstitutionen för husdjursgenetik (HGEN)
(creator_code:org_t)
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Sveriges lantbruksuniversitet
Sammanhörande titlar
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Ingår i:Organic Agriculture: Springer Science and Business Media LLC8, s. 121-1281879-42381879-4246
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