Resumo

MARTINEZ-MENDEZ, Daniel et al. Rehabilitation of palisade grass meadow with different management methods. Rev. Mex. Cienc. Agríc [online]. 2016, vol.7, n.8, pp.1787-1800. ISSN 2007-0934.

Meadow degradation directly affects fodder production, resulting in low productivity per unit area. The aim of this study was to evaluate mechanical work (weeding and harrowing), fertilization (46-23-00 N, P and K) and chemical weed control to rehabilitate a palisade grass meadow, in the municipality of Medellin, Veracruz. The experiment was conducted from September 2011 to December 2012, during two periods of rain, in a random block arrangement. The variables evaluated were: plant cover, plant density and production of dry matter (MS). The initial condition of the meadow was as follows: palisade grass: coverage 27% and 4.8 plants m-2 and broadleaf: coverage 56% and 50.3 plants m-2. Predominant weeds were Desmodium spp. and Calopogonium mucunoides Desv. The analysis showed statistically significant differences (p≤ 0.05) in all variables. In the first period, the highest coverage of palisade grass (99%), lower weed coverage (1%) and lower density of weeds (less than 6 plants m-2) was observed in treatments with chemical control, resulting in increased accumulation of dry matter (from 5 475 to 6 381 kg ha-1). In the second period with chemical control there was a higher coverage of palisade grass (> 90%), lower coverage of weeds (<14%) and higher dry matter, which ranged from 1 122 to 4 719 kg ha-1, beating the rest of the treatments. It is concluded that chemical weed control improved forage production palisade grass meadow.

Palavras-chave : Desmodium spp; Calopogonium mucunoides Desv.; plant density; vegetation cover.

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