Sobressemeadura de cultivares de aveia em pastagem de estrelaafricana manejada com diferentes resíduos de forragem

Abstract

The objective of this study was to evaluate the oversown of different oat cultivars in grazing African star (Cynodon nlemfuensis vr. Nlemfuensis) managed with different forage residuals. The oat cultivars used were black oat (Avena strigosa), common oat (Avena sativa), oat IAPAR-61 (Avena strigosa IAPAR cv-61), oat IAPAR-126 (Avena sativa IAPAR cv-126). The research was conducted at Federal Technological University of Paraná, Campus Dois Vizinhos, between 05/15//2009 and 10/26/2009. The experimental design was randomized blocks, in a 4 x 3 factorial arrangement (four oat cultivars and three residues African star). We evaluated forage mass, percentage of the structural components of the forage, total production, total production of oats and stem production stargrass and forage quality. There was no interaction between cultivar and the forage for the variables studied. The oversown with oat cv. IAPAR-126 showed higher total forage production (oat + African star) (4427.1 versus 2384.0 kg DM / ha) and oats (2453.0 versus 1588.7 kg DM / ha) compared to the common oat. The black oat showed higher percentage of stem (13.6%) compared to oat cv. IAPAR-126 (5.4%). The common oat showed higher ADF content in the residue (African star + oats) compared to oat IAPAR-126 (41.9 versus 36.3%). Already the common oat showed lower NDF (49.0%) compared to oats white IAPAR 126 (54.9%) and black oat (57.0%). The common oat showed a higher content of crude protein (15.6%) compared to others cultivars.