Abstract
This work aimed to assess the yield of five forage species subjected to nitrogen (N) levels at three different cutting ages. The experiment was carried out in the city of Santa Tereza do Oeste, at IAPAR’s (Agronomic Institute of Paraná) experimental field, by applying a randomized complete block design in a factorial scheme 5×4×3, with five species: common black oat (Avena strigosa Schreb cv. Common), IPR 61 oat (Avena strigosa Schreb cv. IPR 61), Triticale Tpolo 981(Xtriticosecale wittmack), IPR 126 White oat (Avena sativa cv. IPR 126) and ryegrass (Lolium multiflorum Lam.); N levels were (0, 30, 60 and 120 kg ha-1); cutting ages were 66, 95 and 116 days after emergence (DAE), with three replications. Dry matter (DM) productivity was assessed in kg ha-1 by cut and total. The common black oat proved to be different from the other forage plants in DM yield, accumulating less quantities of it due to its cycle. The application of nitrogen fertilization to the coverage linearly influenced the ryegrass at 66 DAE and all other species at 116 DAE in a positive manner. Nitrogen did not influence the total accumulation of dry matter of both common black oat and Triticale Tpolo 981. Key words: Avena sativa L., Triticosecale wittmack, Lolium multiflorum Lam, nitrogen, cuts.
Highlights
The quality and quantity of dry matter to be produced by winter forage plants are determined, among other factors, by the handling to which they are subjected in the production stage, such as irrigation, fertilization, as well as cutting height and frequency (Alvim and Coser, 2000)
Dry matter (DM) production was not affected by nitrogen fertilization in the first cut (66 days after emergence (DAE)) for the following species: common oat, IPR 61 and Triticale Tpolo 981 (Figure 1A, B and C), not significantly adjusting to linear or quadratic regression
Nitrogen fertilization did not increase DM yield in the first cut, possibly due to low rainfall, what may have influenced the incorporation of fertilizers in the soil
Summary
The quality and quantity of dry matter to be produced by winter forage plants are determined, among other factors, by the handling to which they are subjected in the production stage, such as irrigation, fertilization, as well as cutting height and frequency (Alvim and Coser, 2000). Nelson et al (1977) stated that nitrogen fertilization and evaluation periods on the tiller population are some of the main determinants of biomass production. Moreira et al (2001) obtained results around 150 kg N ha-1, in terms of yield and forage quality for oat cultivar IPR 61 subjected to increasing levels of nitrogen with higher concentrations of cell wall (ADF and NDF) and lower crude protein in the second cut at 119 days Nitrogen is fundamentally important in the production process of pastures, for is an essential component of organic compounds such as amino acids and proteins, nucleic acids, hormones and chlorophyll (Lavres and Monteiro, 2003). Nelson et al (1977) stated that nitrogen fertilization and evaluation periods on the tiller population are some of the main determinants of biomass production. Moreira et al (2001) obtained results around 150 kg N ha-1, in terms of yield and forage quality for oat cultivar IPR 61 subjected to increasing levels of nitrogen with higher concentrations of cell wall (ADF and NDF) and lower crude protein in the second cut at 119 days
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
