Data/hora: 23/06/2024 18:01:38

Biblioteca(s): | Embrapa Agrossilvipastoril.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | B - 1
Data corrente: | 19/01/2018
Data da última atualização: | 07/02/2018
Autoria: | SOUZA, A. S. S.; MATARAZZO, S. V.; MONTEIRO, R. A. C.; TOLEDO, L. M. de.
Afiliação: | LUIZ ANTÔNIO SANTANA SOUZA, UESC-IHEUS; SORAIA VANESSA MATARAZZO, UESC-ILHEUS; ROBERTA APARECIDA C MONTEIRO, CPAMT; LUCIANDRA MACEDO DE TOLEDO, INSTITUTO DE ZOOTECNIA-NOVA ODESSA.
Título: | Physiological and behavioral responses of dairy heifers in an integrated-crop-livestock-forestry system.
Ano de publicação: | 2017
Fonte/Imprenta: | African Journal of Agricultural Research, v. 12, n. 15, p. 1278-1285, 2017.
ISSN: | 1991-637X
DOI: | http://dx.doi.org/10.5897/AJAR2016.11918
Idioma: | Inglês
Conteúdo: | The integrated crop-livestock-forestry system has been an option in tropics to mitigate the effects of heat stress on pasture-based system for dairy cows. We evaluate the effects of shade arrangements in integrated crop-livestock-forestry systems on physiological and behavioral responses of crossbred dairy heifers. Twenty-four crossbred European-Zebu heifers with 330.0±36.7 kg of body weight were assigned in three treatments: no shade, partial shade or total shade. Air temperature (34.4°C), black globe temperature (41.6°C), temperature humidity index (84) and heat load index (98) were higher (P<0.05) for the No shade treatment. Higher values of respiratory rate (99 mov.min-1) and skin temperature (38.1°C) were also found for the no shade treatment. Shade availability affected the grazing time (U = 246.5, P<0.05). Heifers spent 10% more time in pasture on shade treatments. No difference was found on time spent in rumination, drinking or walking on shade treatments. Shade provision was an efficient strategy to reduce respiratory rate and skin temperature as well as to increase grazing time in integrated crop-livestock-forestry system.
Thesaurus Nal: | Cattle; Dairy heifers; Eucalyptus; Heat stress; Integrated agricultural systems; Pastures; Shade.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Agrossilvipastoril (CPAMT)
Exemplares: | CPAMT - (885-1) - UPC - AP - DD -  -  -  - DIS