FORAGE YIELD AND COMPOSITION OF BLACK OAT IN MONOCULTURE AND IN ASSOCIATION WITH WINTER VETCH

Associated grass-legume pastures have advantages over grass monoculture; in order to evaluate them the association of black oat (Avena strigosa Schreb) with winter vetch (Vicia villosa Roth) was analysed. The objective study forage yield, botanical, morphological, and chemical composition monoculture vetch, at different crop heights residual stubble heights. Eighteen treatments were evaluated randomized complete blocks divided plots. In large plots, culture type (monoculture or association); small nine harvest management options (combinations) three (Ch: 40, 50 60 cm) (Rsh: 8, 14 20 cm). Forage yield higher (p ≤ 0.05) Ch50-Rsh8, Ch60-Rsh8 Ch60-Rsh14 during second cycle, an average 8555 kg DM ha-1. association, more cuts made (three four) Ch40-Rsh14 Ch40-Rsh20 fewer (one two) Ch60-Rsh8, Ch60-Rsh20. Crude protein concentration 19 % than (19.2 16.2 %); highest concentrations crude obtained Ch40-Rsh8, (average 20.5 %), lowest recorded (13.2 %). least neutral detergent fibre harvested Ch50-Rsh14 43.4 (49.3 %) a greater amount harvested, distributed two harvests, Ch cm combination 8 Rsh. However, did not best composition, due lower concentration.