Bradyrhizobium japonicum doses and fertilizer from cupuaçu residues: seedling quality, chlorophyll content, and photosynthetic efficiency in Mezilaurus itauba

  • Aline das Graças Souza Universidade Federal da Paraíba https://orcid.org/0000-0001-8158-5933
  • Edna Ursulino Alves Universidade Federal da Paraíba
  • Thiago Jardelino Dias Universidade Federal da Paraíba
  • Wellington Farias Araujo Universidade Federal de Roraima
  • Oscar Jose Smiderle Empresa Brasileira de Pesquisa Agropecuária
Palavras-chave: Itaúba; leaf area; organomineral; nitrogen-fixing bacteria; physiological indices.

Resumo

This study evaluates the optimal dose for maximum technical efficiency of Bradyrhizobium japonicum (B. japonicum), both with and without a fertilizer derived from cupuaçu residues (FERCup), on the early growth, seedling quality, and physiological metrics of Mezilaurus itauba in the northern Amazon. We assessed several parameters: shoot height (SH, cm), stem diameter (SD, mm), shoot dry mass (SDM, g plant-1), root dry mass (RDM, g plant-1), total dry mass (TDM, g plant-1), Dickson Quality Index (DQI), chlorophyll a (CHL a, μg mL-1), chlorophyll b (CHL b, μg mL-1), total chlorophyll (CHL total, μg mL-1), Nitrogen Balance Index (NBI), specific leaf area (SLA, cm² g-1), and leaf area ratio (LAR, m² g-1). A B. japonicum dose of 0.30 mL L-1, with or without FERCup, enhanced seedling quality and robustness in M. itauba under the study conditions. Including FERCup at these doses significantly improved the morphological traits of the M. itauba seedlings. Additionally, B. japonicum doses of 0.2 and 0.4 mL L-1 with FERCup positively impacted all physiological indices in M. itauba seedlings 180 days post-transplant.

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Publicado
2025-10-20
Como Citar
Souza, A. das G., Alves, E. U., Dias, T. J., Araujo, W. F., & Smiderle, O. J. (2025). Bradyrhizobium japonicum doses and fertilizer from cupuaçu residues: seedling quality, chlorophyll content, and photosynthetic efficiency in Mezilaurus itauba. Acta Scientiarum. Agronomy, 48(1), e73108. https://doi.org/10.4025/actasciagron.v48i1.73108
Seção
Produção Vegetal

 

2.0
2019CiteScore
 
 
60th percentile
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2.0
2019CiteScore
 
 
60th percentile
Powered by  Scopus