Performance and carcass traits of goat kids fed high-concentrate diets containing citrus pulp or soybean hulls
The objective in this trial was to determine the effects of partial replacement of ground corn by citrus pulp or soybean hulls on performance and carcass characteristics of feedlot goat kids. Twenty one Boer x Saanen kids (initial BW 15.8 ± 0.7kg), nine males and 12 females, were distributed in a co...
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Veröffentlicht in: | Ciência rural 2016-04, Vol.46 (4), p.707-712 |
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Zusammenfassung: | The objective in this trial was to determine the effects of partial replacement of ground corn by citrus pulp or soybean hulls on performance and carcass characteristics of feedlot goat kids. Twenty one Boer x Saanen kids (initial BW 15.8 ± 0.7kg), nine males and 12 females, were distributed in a complete randomized block design, according to sex and initial body weight. Treatments were set by replacing 50% of ground corn (DM basis) for citrus pulp or soybean hulls; whereas, forage concentrate ratio was of 10:90. Partial replacement of corn by citrus pulp or soybean hulls increased dry matter intake, average daily gain and final body weight, but feed efficiency was not affected. There was no difference between citrus pulp or soybean hulls. Inclusion of coproducts increased slaughter weight, hot and cold carcass weight and longissimus muscle area, with no difference between citrus pulp and soybean hulls. Subcutaneous fat thickness, hot and cold carcass yields, shrink after chilling and body wall thickness were not affected by treatments. Citrus pulp and soybean hulls can replace 50% of ground corn (DM basis) increasing dry matter intake and weight gain in goat kids enabling higher slaughter weight at earlier age.
RESUMO: O objetivo neste estudo foi avaliar a substituição parcial do milho pela polpa cítrica (PC) ou casca de soja (CS) sobre o desempenho e as características de carcaça de cabritos confinados. Foram utilizados 21 cabritos Boer x Saanen (PC inicial de 15,8±0,7kg), sendo nove machos e 12 fêmeas, distribuídos em delineamento experimental de blocos completos casualizados (7 blocos e 3 tratamentos). Os tratamentos foram definidos pela substituição de 50% do milho pela PC ou CS (% da MS). As dietas continham 90% de concentrado e 10% de volumoso. A substituição parcial do milho pela PC ou CS aumentou o consumo de matéria seca (CMS), o ganho médio diário de peso corporal (GMD) e o peso corporal final, porém a eficiência alimentar não foi alterada. A inclusão dos coprodutos aumentou o peso corporal ao abate (PCA), o peso de carcaça quente (PCQ) e fria (PCF) e a área de olho de lombo (AOL). Não houve diferença entre os coprodutos com relação ao desempenho e às características de carcaça. A substituição de 50% do milho (64,2% de MS) pela polpa cítrica ou casca de soja, em dietas com alto concentrado, aumenta o consumo de matéria seca e o ganho médio diário de peso dos cabritos, possibilitando maior peso ao abate com idade menor. |
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ISSN: | 0103-8478 1678-4596 0103-8478 1678-4596 |
DOI: | 10.1590/0103-8478cr20150450 |