Effect of cutting regimes on forage and grain yield of oats
DOI:
https://doi.org/10.1590/S1678-3921.pab1991.v26.3393Keywords:
cutting frequencies, genotypes, nitrogen fertilization, <i>Avena sativa<i/>, <i>Avena strigosa</i>Abstract
Ten oat genotypes (Avena spp.) were evaluated for forage and grain yield at the experimental area of the School of Agronomy, Passo Fundo, Rio Grande do Sul state, Southern Brazil, in 1988. Three cutting frequencies were applied: no cutting, one and two cuttings. Plots of 18 m2, in randomized blocks design with split plot and three replicates were used. The crop was established under conventional tillage. The fertilization was with 250 kg/ha of 5-25-25, 20 kg/ha of N 45 days after emergence, 20 kg/ha of N after the first and second cuttings. Oat was sown on April 5, 1988 (plots with cuttings) and June 18, 1988 (plots without cutting), by hand, with 80 viable seeds/m in spaced lines of 0,2 m/apart. The oat herbage was harvested when plants were at 30 cm height. The regrowth was cut at the same height. Dry matter (DM) yield and crude protein content (PB %) were determined. Genotypes UPF 850304, UPF 850299 and UPF 850318 showed the best performance for forage and grain yield, under one and two cuttings. Forage yield was analogous to that of black oats, however grain yield was higher, above 2.100 kg/ha on average.
