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

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.

Bibliographic Details

Main Authors:	BARROS, L. M., MITTELMANN, A., PEDROSO, C. E., BORTOLINI, F., VERONEZ, R. P., TAVARES, L. G. R.
Other Authors:	LÍLIAN MOREIRA BARROS, Universidade Federal de Pelotas; ANDREA MITTELMANN, CNPGL; CARLOS EDUARDO PEDROSO, Universidade Federal de Pelotas; FERNANDA BORTOLINI, CPACT; RODRIGO PORTO VERONEZ, Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul; LUIS GUILHERME RAMOS TAVARES, Universidade Federal de Pelotas.
Format:	Artigo de periódico biblioteca
Language:	Ingles English
Published:	2022-10-04
Subjects:	Cultivar tetraplóide, Breeding population, Tetraploid cultivars, Azevém, Gramínea Forrageira, Lolium Multiflorum, Pastagem, Forage crops, Pastures, Plant density,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1147096 https://doi.org/10.15446/acag.v70n3.88571
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