Produção e valor nutritivo de forrageiras anuais de estação fria em diferentes épocas de semeadura

Abstract

The objective of this study was to evaluate forage production of three different genotypes of oat (Avena sativa) cv. IPR 126, (Avena strigosa Schreb) cv. IAPAR 61, and common oat (Avena strigosa Schreb), a genotype of ryegrass (Lolium multiflorum Lam) cv. common and also a genotype of Rye (Secale cereale) at different sowing dates. The study was conducted at Universidade Tecnológica Federal do Paraná Campus Dois Vizinhos-PR. There was a significant difference in forage production among cultivars and also between sowing dates. Ryegrass Barjumbo stood out for its high production of forage mass and the greater number of cuts between the forage when seeded on April 4. The Rye was the cultivar with the lowest number of cuts and lower forage mass when seeded on May 16. Cultivars of Oat IPR 126 and Oat IAPAR 61 no significant differences between them, as common oat showed higher forage mass when sown in May. The sowing season has not had major influence on the nutritive value of forage seeding is recommended at the beginning of April. The nutritional value of ryegrass and IPR 126 cultivars were less than the other cultivars (common oats, IAPAR 61 and rye), justifying further studies in relation to cutting height for these species, as well as quality assessment in different months of the year because consider the average of the plant is not suitable because its vegetative cycle interfere with protein and fiber. The best time for sowing of winter forage for the South West of Paraná is the beginning of April, which was the time when the forages its largest number of cuts thus enabling a better use of pasture.