Influence of grazing intervals and stubble eight in elephantgrass pastures on the prodution and composition of the forage and of the milk
Keywords:
Voluntary intake, Pennisetum purpureum L. Schum., stoking rate, nutritive valueAbstract
In elephantgrass pastures, so much the grazing interval as the post grazing stubble height, they can influence, for hypothesis, the production and the quality of the milk. Like this, the objectives of this work went to evaluate the effects of two intervals of it defoliates (24 and 30 days) and of two stubble heights post grazing (50 and 100 cm), in pastures of elephantgrass cv. Napier, on the agronomic characteristics and nutritive value of elephantgrass cv. Napier, as well as the production and chemical composition of the milk of Holstein x Zebu crossbreed cows, during the rainy station. A complete randomized block design with split-splitplot arrangement was utilised, with grazing intervals assigned to plots, stubble heights to sub-plots and months to split-splitplot. The accumulation and the voluntary intake only were influenced by months of the year, with larger values of December to April (average of 1817 kg of DM/ha) and in December (2.5% of the live weight), respectively. The nutritional value of the accumulated forage did not vary in function of the evaluated period, but it did not present homogeneous tendency for the months. The stoking rate was larger during the months of November, December, January of April (average of 4,1 UA/ha) and the milk production in November and December (average of 13,2 kg/ vaca/dia). The protein and lactose tenors of the milk varied with the months of the year, being larger in May for protein (3,3%) and, those of fat and of total solids, they were larger for 24 that for 30 days (averages of 3,9 and 12,2%, versus 3,7 and 11,7%, respectively). In the rainy station, the elephantgrass pasture, was capable to provide productions of milk and stoking rates medium of 11 kg/cow/day and 3,9 UA/ha, respectively.
Downloads
Downloads
Published
Issue
Section
License
Os autores não serão remunerados pela publicação de trabalhos, pois devem abrir mão de seus direitos autorais em favor deste periódico. Por outro lado, os autores ficam autorizados a publicar seus artigos, simultaneamente, em repositórios da instituição de sua origem, desde que citada a fonte da publicação original seja Boletim de Indústria Animal. A revista se reserva o direito de efetuar, nos originais, alterações de ordem normativa, ortográfica e gramatical, com vistas a manter o padrão culto da língua e a credibilidade do veículo. Respeitará, no entanto, o estilo de escrever dos autores. Alterações, correções ou sugestões de ordem conceitual serão encaminhadas aos autores, quando necessário. Nesses casos, os artigos, depois de adequados, deverão ser submetidos a nova apreciação. As opiniões emitidas pelos autores dos artigos são de sua exclusiva responsabilidade. Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob a Licença Creative Commons Attribution (CC-BY-NC). A condição BY implica que os licenciados podem copiar, distribuir, exibir e executar a obra e fazer trabalhos derivados com base em que só se dão o autor ou licenciante os créditos na forma especificada por estes. A cláusula NC significa que os licenciados podem copiar, distribuir, exibir e executar a obra e fazer trabalhos derivados com base apenas para fins não comerciais.