The effect of Tithonia diversifolia in a silvopastoral system with Urochloa brizantha cv. Xaraés

Autor(es)

Ovani, Vagner ; Kruger, Ana Maria ; Bizzuti, Beatriz Elisa ; Perez-Marquez, Simon ; Lima, Paulo de Mello Tavares ; Mauricio, Rogerio Martins ; Louvandini, Helder ; Abdalla, Adibe Luiz

• Tipo de documento: Artigo Científico
• Fonte: CROP & PASTURE SCIENCE; v. 75, n. 11, p. 12-pg., 2024-01-01.

Resumo

Context Brazilian livestock contributes significantly to pasture-based global animal protein production, but faces economic and environmental challenges due to unsustainable practices. Silvopastoral systems (SPS) offer a promising solution to these issues.Aims This study aims to assess the impact of Tithonia diversifolia in a SPS with Urochloa brizantha cv. Xara & eacute;s (Xara & eacute;s grass) compared to traditional exclusive pasture (EP).Methods The experiment was conducted using a completely randomized design with eight paddocks (four EP and four SPS with T. diversifolia), grazed by Santa Ines male lambs across six stocking cycles. Herbage biomass production, morphological composition, and nutritive value, animal stocking rate, and proportion of T. diversifolia intake using delta 13C were evaluated.Key results Xara & eacute;s grass biomass production was unaffected by the presence of T. diversifolia in SPS. SPS with T. diversifolia accumulated more total herbage biomass and greater nutritive content than EP. However, Xara & eacute;s grass in SPS showed a reduction in leaf fraction and increase in stem and fibrous fractions. T. diversifolia constituted 42.7% of the biomass in SPS, while only 13.74% of fecal carbon originated from it.Conclusions SPS with T. diversifolia produces a greater total herbage biomass than EP, but negatively affects leaf fraction and nutritive value of Xara & eacute;s grass. Lambs showed a preference and selective intake for Xara & eacute;s grass over T. diversifolia.Implications Integrating T. diversifolia in SPS can increase herbage biomass, but careful management is necessary to preserve nutritional quality and minimize lamb selectivity. (AU)

• Processo FAPESP: 22/03513-8 - Análises qualitativas da biomassa disponível no Sertão alagoano para produção de pequenos ruminantes
• Beneficiário: Simon Perez Marquez
• Modalidade de apoio: Bolsas no Brasil - Programa Capacitação - Treinamento Técnico
• Processo FAPESP: 24/07657-0 - Efeito do padrão de distribuição, densidade e diversidade de árvores nativas em sistema silvipastoril no bioma amazônico
• Beneficiário: Vagner Ovani da Silva
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado