Full Length Research Paper
Abstract
The performance, chemical composition and in vitro gas production of four varieties: Emerald (Eme),Capuchona (Cap), Petunia (Pet) and Cabuya (Cab) of whole plant barley (Hordeum vulgare) were evaluated, and fertilized with four levels of nitrogen (I, 80; II, 110; III, 140 and IV, 170 kg N/ha). The variables measuredwere: Height (dm), bulk (mm), number of leaves and yield production (Tonne DM/ha); chemical composition and in vitro gas production were determined using a 4 x 4 arrangement of 16 treatments within a randomized complete block design. The highest yield production (P < 0.001) was in Cap, (5.37 ± 0.35 Tonne/ha) followedby Pet and Cab. The height, bulk and number of leaves were higher (P < 0.001) in Cap (7.4 cm, 3.4 mm and 4.8, respectively) compared to the other varieties. NDF content was lower (P < 0.001) in Eme compared to therest. ADF in Cap and Eme was lower (P < 0.001) versus Pet and Cab. CP content was highest (P < 0.001) inPet, without differences (P > 0.05) between Cap and Cab (124.3 ± 2.8 g/kg DM), and a lowest content (P < 0.001) in Eme (110.3 g/kg DM). In vitro gas production was higher (P < 0.001) in Eme versus Cab. Data suggested that the Cap variety has the better production values and nutritional quality versus the other varieties.
Key words: Barley, Hordeum vulgare, in vitro gas production, fertilization.
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