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Title: Effects of extensive system versus semi-intensive and intensive systems on growth and carcass quality of dairy kids
Authors: Zurita Herrera, Pedro
Delgado Bermejo, Juan Vicente
Argüello Henríquez, Anastasio 
Camacho Vallejo, María Esperanza
Germano Costa, Roberto
UNESCO Clasification: 3104 Producción Animal
Keywords: Meat Quality
Live Weight
Attributes, et al
Issue Date: 2011
Publisher: 1516-3598
Journal: Revista Brasileira de Zootecnia 
Abstract: The aim of this research was to study the effects of three different management systems on growth and carcass quality of 61 Murciano-Granadina breed kids and their interaction with sex. In the extensive system, 21 kids were allocated to suckle from their dams on free-range pasture with no additional feedstuff. In the semi-intensive system, 20 kids were suckled from their dams and had access to alfalfa hay and cereal straw (no free-range pasture). In the intensive system, 20 kids were separated from the dams at birth and then fed with milk replacer and alfalfa hay. Animals were slaughtered at 7.00 ± 1.00 kg of average BW. The semi-intensive system and extensive system kids grew faster than intensive system animals (127, 113 and 96 g/d, respectively). Differences in energy intake may explain these differences. Intensive system kids displayed the lowest real dressing percentages, calculated as 100 × (hot carcass weight/empty body weight), due to high development of empty gastrointestinal tract. The long leg and carcass were larger in extensive system kids than in kids from other management systems, presumably due to high physical activity on the free-range pastures. The carcasses and cuts from semi-intensive system and extensive system kids displayed more fat than those of intensive system kids. Males grew faster than females (122 and 103 g/d, respectively). Carcasses in male kids showed a higher content of bones but a lower content of fat than carcasses in female kids. The extensive system is feasible for producing kid meat from a dairy breed.
ISSN: 1516-3598
DOI: 10.1590/S1516-35982011001100045
Source: Revista Brasileira de Zootecnia [ISSN 1516-3598], v. 40, p. 2613-2620
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