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Neto, Rolando Pasquini ; Furtado, Althieres Jose ; da Silva, Gabriele Voltareli ; Lobo, Annelise Aila Gomes ; Abdalla Filho, Adibe Luiz ; Brunetti, Henrique Bauab ; Bosi, Cristiam ; Pedroso, Andre de Faria ; Pezzopane, Jose Ricardo Macedo ; Oliveira, Patricia Perondi Anchao ; Rodrigues, Paulo Henrique Mazza

• Tipo de documento: Artigo Científico
• Fonte: CROP & PASTURE SCIENCE; v. 75, n. 5, p. 15-pg., 2024-01-01.

Resumo

Context A challenge for the livestock sector is to improve the production and nutritive value of forage grasses through sustainable management strategies. Aims This study evaluated the impact of management on the productive and nutritive value of five pasture-based production systems: irrigated pasture with 600 kg nitrogen (N) ha(-1) (IP600); rainfed pasture with 400 kg N ha(-1) (RP400); rainfed pasture with 200 kg N ha(-1) (RP200); silvopastoral with 200 kg N ha(-1) (SP200); and degraded pasture without N fertilisation (DP0). Methods During two experimental years, samples were collected pre- and post-grazing to determine forage and nutritional parameters. Land-saving effects and efficiencies of N fertilisation and water use were calculated. Key results For C-4 grasses, forage mass accumulation was greater for IP600 and RP400. IP600 also presented the greatest leaf area index and crude protein concentration, whereas DP0 presented the lowest values of both. For C-3 grasses in the IP600 treatment, greater forage mass accumulation and leaf area index were found in winter than in autumn; all nutritional characteristics were not affected by season of the year. For land-saving effect, and N- and water-use efficiencies, IP600, RP400 and RP200 presented higher values than DP0 and SP200. Conclusions More intensified systems with proper management allowed better productive and nutritional characteristics than degraded pasture or silvopasture, especially during seasons with greater precipitation or when irrigated. Implications Intensification practices make better use of natural resources (water and land) and agricultural inputs (N fertiliser) to ameliorate the effects of seasonality and improve quality and productivity of tropical grasses in pasture-based livestock production systems. (AU)

• Processo FAPESP: 17/20084-5 - Práticas estratégicas para mitigação das emissões de gases de efeito estufa em sistemas de pastagem do Sudeste brasileiro
• Beneficiário: Paulo Henrique Mazza Rodrigues
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático
• Processo FAPESP: 22/08165-8 - Práticas estratégicas para mitigação das emissões de gases de efeito estufa em sistemas de pastagem do Sudeste brasileiro
• Beneficiário: Adibe Luiz Abdalla Filho
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado