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Pesquisa Agropecuária Brasileira

versão impressa ISSN 0100-204Xversão On-line ISSN 1678-3921

Resumo

BARTMEYER, Tarcísio Nicolau et al. Double purpose wheat under beef cattle grazing in Campos Gerais, Paraná State, Brazil . Pesq. agropec. bras. [online]. 2011, vol.46, n.10, pp.1247-1253. ISSN 0100-204X.  http://dx.doi.org/10.1590/S0100-204X2011001000019.

The objective of this work was to assess yield of double purpose wheat cultivar BRS 176 and cattle weight gain according to grazing periods, taking into account grazing intensity. The experiment was carried out in Castro, Paraná State, Brazil, in an Inceptisol, from May to November 2004. A completely randomized block design, with three replicates, was used. The treatments consisted of four grazing periods: T-0, zero day; T-15, 15 days; T-30, 30 days; and T-45, 45 days. Steers with 260 kg live weight were evaluated under continuous grazing, with variable stocking and daily forage allowance of 8% animal live weight. Grain yield was 3,999, 4,154, 3,210, and 1,588 kg ha-1 for T-0, T-15, T-30, and T-45, respectively, and animal weight gain was 0, 181, 351, and 459 kg ha-1. Cultivar BRS 176 has high grain yield potential under grazing and copes well with defoliation. Grazing on cultivar BRS 176 increases cattle average daily weight gain, and weight gain per hectare increases linearly with the increase in the grazing period.

Palavras-chave : Triticum aestivum; animal gain; grazing intensity; grazing period; grain yield integrated crop-livestock system.

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