Sowing rate and its effects on forage yield of tetraploid ryegrass.

• Autor(a) principal: BARROS, L. M.
• Data de Publicação: 2021
• Outros Autores: MITTELMANN, A., PEDROSO, C. E., BORTOLINI, F., VERONEZ, R. P., TAVARES, L. G. R.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
• Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1147096; https://doi.org/10.15446/acag.v70n3.88571
• topic: Cultivar tetraplóide; Breeding population; Tetraploid cultivars; Azevém; Gramínea Forrageira; Lolium Multiflorum; Pastagem; Forage crops; Pastures; Plant density

There is a shortage of information about the ryegrass crop (Lolium multiflorum Lam.), especially regarding the suitable sowing rate. Thus, the present work aimed to determine the most adequate sowing rate for tetraploid ryegrass cultivars. A tetraploid ryegrass population was sown at different densities: 150, 300, 600, 900, 1200, 1500, 1800 seeds/m². The number of plants per m², percentage of soil cover, leaf yield and green and dry forage yield were evaluated. The experimental design was randomized blocks with three replications. To observe the behavior of the pasture at different densities for each cut, regression analysis was performed, through which it was possible to verify that the sowing rate has greater influence on the initial cut of the crop. In all the variables analyzed by regression, only the second cut presented a linear trend favorable to the increase in density. In the other cuts, an increase was observed, both in the height of plants and in the yield variables, up to the density of 1500 seeds/m², with a subsequent fall to the highest density, indicating that higher densities may be detrimental to pasture yield. Therefore the density of 1500 seeds/m² is the most suitable for tetraploid ryegrass cultivars.