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2009 | 27 | 4 |
Tytuł artykułu

Growth rate, carcass traits and meat quality of slow-growing chicken grown according to three raising systems

Warianty tytułu
PL
Tempo wzrostu, cechy tuszy i jakość mięsa wolno rosnących kurcząt w trzech systemach utrzymania
Języki publikacji
EN
Abstrakty
EN
The experiment was conducted to study the effect of indoor-floor, indoor-net and free-range raising systems on growth rate, carcass traits and meat quality of slow-growing broiler chicken. One-day old Gushi chicks were raised until day 35 of life. On day 36, 135 female birds of similar body weight (mean 354 g), were randomly selected and assigned to one of three raising systems (indoor-floor,indoor-net and free-range), each with three replicates of 15 birds (i.e. 45 birds per system). Both the indoor-floor and indoor-net systems were run in pens with solid or net floor, respectively, in a poultry research house (7 birds/m2). The free-range system was run in a similar indoor house (7 birds/m2), but with a free access of birds to grassy paddock (1 bird/m2). All birds were offered the same diets and were kept growing for 112 days. The body weight and body weight gain of birds from free-range system were found to be significantly lower than of those kept in indoor-floor system (P <0.05), while for feed conversion ratio (feed/gain) the reverse relation (P <0.05) was observed. There was no difference in eviscerated carcass, and breast and thigh percentages among three raising systems (P>0.05), while the systems significantly affected the abdominal fat and stomach per cent of carcass, and tibia strength (P<0.05). The water, protein and fat contents, water-holding capacity, shear force and pH of the meat were unaffected (P>0.05) by the raising system. It is concluded that in slow-growing chicken the free-range raising system had significant effect on growth performance,but only limited on carcass traits and meat quality, except for abdominal fat, stomach percentage and tibia strength.
PL
Kurczęta utrzymywano w budynkach z podłogą stałą, z podłogą z siatki oraz w systemie wolnym w budynkach, ale z dostępem do trawiastego wybiegu – odpowiednio system I, II i III. Obsada we wszystkich systemach wynosiła 7 ptaków/m2, a systemie III na jednego ptaka dodatkowo 1m2. Badania prowadzono przez 112 dni, stosując jednakową paszę, a następnie ptaki ubito. Masa ciała i przyrosty w systemie III okazały się istotnie niższe niż w I, podczas gdy zużycie paszy na przyrost kształtowało się odwrotnie. Nie stwierdzono różnic między systemami utrzymania w masie tuszy oraz masie mięśni mostka i nóg wyrażonej jako procent tuszy. Stwierdzono wpływ systemu utrzymania na udział tłuszczu wewnętrznego i masy żołądka w masie tuszy i na kruchość kości. System utrzymania nie wpływał istotnie na zawartość wody, białka i tłuszczu, jak również na zdolność utrzymywania wody własnej, siłę cięcia i pH mięsa.
Słowa kluczowe
EN
Wydawca
-
Rocznik
Tom
27
Numer
4
Opis fizyczny
p.361-369,fig.,ref.
Twórcy
autor
  • Poultry Institute, Chinese Academy of Agricultural Sciences, Yangzhou, Jiangsu Province, 225003, China
autor
  • Poultry Institute, Chinese Academy of Agricultural Sciences, Yangzhou, Jiangsu Province, 225003, China
autor
  • Poultry Institute, Chinese Academy of Agricultural Sciences, Yangzhou, Jiangsu Province, 225003, China
autor
  • Poultry Institute, Chinese Academy of Agricultural Sciences, Yangzhou, Jiangsu Province, 225003, China
Bibliografia
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  • FANATICO A.C., CAVITT L.C., PILLAI P.B., EMMERT J.L., OWENS C.M., 2005a – Evaluation of slow-growing broiler genotypes grown with and without outdoor access: meat quality. Poultry Science 84, 1785-1790.
  • FANATICO A.C., PILLAI P.B., CAVITT L.C., OWENS C.M., EMMERT J.L., 2005b. – Evaluation of slow-growing broiler genotypes grown with and without outdoor access: growth performance and carcass yield. Poultry Science 84, 1321-1327.
  • FANATICO A.C., PILLAI P.B., CAVITT L.C., EMMERT J.L., MEULLENET J.F., OWENS C.M., 2006 – Evaluation of slow-growing broiler genotypes grown with and without outdoor access:sensory attributes. Poultry Science 85, 337-343.
  • FANATICO A.C., PILLAI P.B., EMMERT J.L., OWENS C.M. 2007 – Meat quality of slow-growing chicken genotypes fed low-nutrient or standard diets and raised indoor or with outdoor access.Poultry Science 86, 2245-2255.
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  • LEWIS P.D., PERRY G.C., FARMER L.J., PATTERSON R.L.S., 1997 – Responses of two genotypes of chicken to the diets and stocking densities typical of UK and “Label Rouge” systems: I. Performance, behaviour and carcass composition. Meat Science 45, 501-516.
  • JONES M., MILLIS A.D., 1999 – Divergent selection for social reinstatement and behaviors in Japanese quail: effects on sociality and social discrimination. Poultry and Avian Biology Review 10, 13-223.
  • MARIN R.H., FRETES P., GUSMAN D., JONES R.B., 2001 – Effects of an acute stressor on fear and on the social reinstatement responses of domestic chicks to cage mates and strangers. Applied Animal Behaviour Science 71, 57-66.
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Typ dokumentu
Bibliografia
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Identyfikator YADDA
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