Productivity and crude protein concentration of Tifton 85 pasture-based mixed with pinto peanut

Abstract

Mixed pasture grass-legume systems balance forage supply and minimize environmental impacts by reducing the need for nitrogen fertilization. Pinto peanut (Arachis pintoi Krap. and Greg. “Amarillo”) has several traits that are suitable for mixed pastures but have not yet been adequately explored. The aim of this study was to evaluate a mixture of Tifton 85 bermudagrass (Cynodon dactylon) and pinto peanut and evaluate forage yield, crude protein, and stocking density. A two-year study of three grazing systems was used with the following treatment combinations: (a) Tifton 85 (T) + 100 kg N ha-1 yr-1 + pinto peanut (T + PP+100); (b) T + 100 kg N ha-1 yr-1 (T + 100; control, pure grass); and (c) T + 200 kg N ha-1 yr-1 (T + 200; positive control, pure grass). In this study, forage yield, pasture characteristics and responses of lactating cows were evaluated. The experimental design was completely randomized with three treatments (grazing systems), three replicates (paddocks), and repeated measures (grazing cycles within seasons). Forage accumulation, crude protein concentration, and stocking rate were 15.1; 11.3 and 14.1 t DM ha-1 yr-1; 17%, 16%, and 17%; and 5.3; 4.9 and 6.1 AU ha-1 day-1, respectively. The grass-legume system yielded the best results.

Production and nutritive value of Tifton 85 bermudagrass pastures overseeded with annual ryegrass and inoculated with diazotrophic bacteria

“…The production of 21 t DM/ha of forage in the inoculated pasture was higher than that observed in the same region with Tifton 85 bermudagrass plus ryegrass fertilized with 200 kg N/ha (Olivo et al ., 2019). Ryegrass production (4.6 t DM/ha) was more significant than that found in other studies with overseeding of Tifton 85 bermudagrass of 2.3 t DM/ha (Olivo et al ., 2019) and 3.2 t DM/ha (Ribeiro et al ., 2009). However, the higher forage production observed in the pasture with a higher N dose confirms that Tifton 85 bermudagrass responds well to nitrogen fertilization (Taffarel et al ., 2016).…”

“…The mean CP, TDN and NDF values were 160, 560 and 680 g/kg DM, respectively, which are similar to values obtained in the same region, with ryegrass overseeding on Coastcross-1 bermudagrass (Diehl et al ., 2014). For the CP of Tifton 85 bermudagrass in the summer, the season in which this pasture was predominant, the mean value between grazing systems, 139 g/kg DM, was lower than that observed in a study in which this grass was mixed with forage legumes (Olivo et al ., 2019).…”

“…‘BRS Ponteio’ was oversown at a rate of 50 kg/ha. For ryegrass, in all paddocks, fertilization was performed in May using P 2 O 5 (50 kg/ha) and K 2 O (50 kg/ha), considering the historical production of 3 t DM/ha per year when associated with bermudagrass (Olivo et al ., 2019). The nitrogen fertilization (urea 46% N) used during the autumn-winter was divided into two applications according to the dose proposed for each system.…”

Características Produtivas Da Pastagem Missioneira-Gigante Em Cultivo Estreme E Em Consórcio Com Amendoim-Forrageiro Sob Pastejo

“…Entre as opções de pastagens pertencentes à família das fabáceas, encontrase o amendoim-forrageiro (Arachis pintoi). É uma leguminosa forrageira nativa da América do Sul, que se destaca em razão de sua prolificidade, elevada produtividade de forragem, altos teores de proteína bruta e digestibilidade, excelente palatabilidade, resistência ao pastejo intenso aliada à ótima competitividade quando associado com poáceas (PAGANELLA & VALLS, 2002;NASCIMENTO, 2006;LUDWIG et al, 2010) .…”

“…Essa melhoria da qualidade proteica da pastagem pode reduzir os custos e a necessidade de alimentos concentrados, mantendo bons índices técnicos. Nesse sentido, entre outros trabalhos similares, Olivo et al (2019) reportaram melhores resultados em um consórcio com amendoim-forrageiro do que no cultivo estreme de Tifton 85, mostrando o potencial e a importância da consorciação de pastagens.…”