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Concentrate intake and performance of dairy calves subjected to programs of supplementary lighting

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EnglishThis research aimed to assess Girolando calves’ concentrate intake and performance when placed in shelters with distinct roofing materials and programs of supplementary lighting during the milk-feeding stage. In order… Click to show full abstract

EnglishThis research aimed to assess Girolando calves’ concentrate intake and performance when placed in shelters with distinct roofing materials and programs of supplementary lighting during the milk-feeding stage. In order to so, we used a completely randomized design with a 3×3 factorial arrangement, with three replications. Females Girolando calves (n=27) were assigned in individual shelters at random with 3 different roofing materials (fiber cement tile, recycled tile and thatched roofs) and subjected to three lighting programs (12, 16 and 20 hours). No interaction was observed between roofing material and lighting programs, whilst no significant effect (P>0.05) was observed among the roofing materials. The supplementary lighting, by providing greater light exposure time, has stimulated intake and therefore, significantly affected (P Key words: animal performance; dairy cattle; light duration; weight gain portuguesEssa pesquisa teve como objetivo avaliar o consumo de concentrado e o desempenho de bezerras da raca Girolando quando colocadas em abrigos com materiais de cobertura e programas de iluminacao suplementar distintos, durante a fase de aleitamento. Para tal, nos utilizamos o delineamento experimental inteiramente casualizado em arranjo fatorial 3×3, com tres repeticoes. As bezerras Girolando (n=27) foram distribuidas ao acaso em abrigos individuais, com materiais de cobertura distintos (telha de fibrocimento, telha reciclada e cobertura com palha), e sujeitas a tres programas de iluminacao (12, 16 e 20h). Nao houve interacao entre os mateiral de cobertura×programas de iluminacao, ao mesmo tempo que nao foi observado efeito significativo (P>0,05) para os materiais de cobertura. A iluminacao suplementar, proporcionando maior tempo de luz, tem estimulado a ingestao, e, portanto, apresentou efeito significativo (P Palavras-chave: desempenho animal; bovino leiteiro; duracao de luz; ganho de peso

Keywords: intake performance; programs supplementary; supplementary lighting; cobertura; performance; concentrate intake

Journal Title: Ciencia Rural
Year Published: 2017

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