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Revista mexicana de ciencias agrícolas

versão impressa ISSN 2007-0934

Resumo

CRUZ HERNANDEZ, Aldenamar et al. Components of the yield and nutritional value of Brachiaria humidicola cv Chetumal to different grazing strategies. Rev. Mex. Cienc. Agríc [online]. 2017, vol.8, n.3, pp.599-610. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v8i3.34.

The objective of this paperwas to study the effect of yield of Brachiaria humidicola cv Chetumal grass at different frequencies and intensities of grazing. The cutoff frequencies of 21 and 28 d and the intensities of 9-11 and 13-15 cm were evaluated, which were randomly distributed in a random block design with 2*2 factorial arrangement with three replicates. Management effects on dry matter accumulation were observed, with accumulation at lower frequency and light grazing intensity being greater. Forage production had a seasonal distribution of 66, 26 and 7% in the rainy season, north and dry seasons, respectively. The leaf ratio in harvested forage was 20, 30 and 86% for north, dry and rainy seasons, respectively. Reductions in dry matter digestibility were observed in the north and rainy seasons as the cut interval increased. The crude protein with severe grazing was 11, 10 and 17% higher in the north, dry and rainy times than with light. It is concluded that the highest forage production was obtained when harvesting at a light intensity of 13-15 cm, every 28 d and the highest protein content and digestibility was obtained when the forage was harvested at severe intensity every 21 d.

Palavras-chave : Brachiaria humidicola; Chetumal grass; forage yield; nutritive quality; pasture frequencies and intensities.

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