Canopy height impact on legume mass and Megathyrsus maximus tiller dynamics in mixed pastures

Autor(es)

Ongaro, Ana Flavia Bastos ; Martuscello, Janaina Azevedo ; Gimenes, Flavia Maria de Andrade ; Batista, Ana Carolina Lopes ; Penteado, Lucas Ferreira ; Premazzi, Linda Monica ; de Mattos, Waldssimiler Teixeira ; Vieira, Marcelo Moretin ; da Costa, Ricardo Lopes Dias ; Gerdes, Luciana

• Tipo de documento: Artigo Científico
• Fonte: ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE; v. 73, n. 1, p. 13-pg., 2023-12-31.

Resumo

The use of grazing management strategies can influence canopy structure and the permanence of legumes. The objective of this work was to evaluate the determination of forage canopy heights as a grazing management strategy regarding herbage mass composition and tiller population dynamics in multispecies pastures comprising Megathyrsus maximus cv. Aruana and the legumes Macrotyloma axillare, Calopogonium mucunoides and Stylosanthes spp. Four treatments, defined by canopy heights of 15, 30, 45 and 60 cm, were evaluated in a randomised block design with four replications. The evaluations were performed under continuous stocking with sheep. Taller pastures (45 and 60 cm) contained greater (P < 0.05) total herbage mass of Aruana leaves and stems and also higher mass of legumes than smaller pastures (15 and 30 cm). The grass tiller population density was different between heights (P < 0.05) of 2.71, 2.02, 1.97 and 1.47 tillers/m(2) for heights of 15, 30, 45 and 60 cm, respectively. The tiller appearance rate was highest in tall pastures (P < 0.05) and the lowest rate and stability index were found in 15 cm pastures. Aruana guineagrass and forage legumes can be managed in the height range of 30-60 cm under continuous stocking. (AU)

• Processo FAPESP: 21/11382-8 - Valor nutritivo e composição botânica de pastos multiespécies de capim Aruana e leguminosas forrageiras sob estratégias de manejo do pastejo
• Beneficiário: Giovanna Castilho Santos
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 19/24550-6 - Produtividade animal e valor nutritivo em pastos mistos de leguminosas e gramínea manejados sob lotação contínua com ovinos
• Beneficiário: Ana Carolina Lopes Batista
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 18/23246-9 - Estratégias de manejo de pastagens visando estabelecimento, produtividade, impacto ambiental e desempenho de ovinos em sistemas integrados de gramíneas e leguminosas
• Beneficiário: Flavia Maria de Andrade Gimenes
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 20/12256-3 - Produtividade animal e estrutura do dossel forrageiro em pastos de leguminosas e gramínea manejados sob lotação contínua com ovinos
• Beneficiário: Marcelo Moretin Vieira
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica