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Overseeding annual summer pastures on soybean crops to overcome the autumnal forage shortage

2023; UNIVERSIDADE FEDERAL DE SANTA MARIA; Volume: 54; Issue: 1 Linguagem: Inglês

10.1590/0103-8478cr20220588

1678-4596

Régis Luís Missio, Igor Kieling Severo, Lucas Candiotto, Felipe Candiotto, Pedro Rodolfo Nielsen Filho, Lisiane Fernandes Soares, Denise Adelaide Gomes Elejalde, Hernán Gerónimo Sosa, Matías Esteban Arenhardt, André Brugnara Soares,

Crop Yield and Soil Fertility

ABSTRACT: In integrated crop-livestock systems, overseeding annual summer pastures over grain crops can reduce forage shortages in autumn without altering grain production. This study evaluated the influence of pearl millet (Pennisetumglaucum L.) and sudangrass (Sorghum Sudanese) overseeded on a soybean (Glycine Max) crop or no-tillage seeding after soybean harvest on productive aspects of pasture. The experimental design was a randomized block with treatments in a 2 × 2 factorial arrangement (pearl millet or sudangrass, overseeding in the full seed stage (R6) of soybean crops or seeding them in a no-tillage system after soybean harvest) in two agricultural years. Pasture height, plant stand, tiller density, and forage production were higher in the first crop year. The overseeding strategy resulted in higher pasture height and foraged production in the first crop year and higher pasture utilization for the next two crop years. Under the no-tillage strategy, the plants stand more elevated in the first crop year, resulting in a higher tiller density in the second crop year. Pasture height, utilization period, and forage production did not differ among the forage species. Pearl millet had a more elevated plant stand, while sudangrass had a higher tiller density. Annual summer pasture overseeding of soybean crops increases the pasture utilization period and forage production in autumn.