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Nitrogen balance and gap of a high yield tropical soybean crop under irrigation

Zambon, Leandro Moraes ; Umburanas, Renan Caldas ; Schwerz, Felipe ; Sousa, Jackellyne Bruna ; Barbosa, Everton Servilho Teixeira ; Inoue, Letícia Pacheco ; Dourado-Neto, Durval ; Reichardt, Klaus

Frontiers in plant science, 2023-09, Vol.14, p.1233772-1233772 [Periódico revisado por pares]

Frontiers Media S.A

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  • Título:
    Nitrogen balance and gap of a high yield tropical soybean crop under irrigation
  • Autor: Zambon, Leandro Moraes ; Umburanas, Renan Caldas ; Schwerz, Felipe ; Sousa, Jackellyne Bruna ; Barbosa, Everton Servilho Teixeira ; Inoue, Letícia Pacheco ; Dourado-Neto, Durval ; Reichardt, Klaus
  • Assuntos: biomass partitioning ; Glycine max ; N balance ; plant nutrition ; Plant Science ; soil inorganic N
  • É parte de: Frontiers in plant science, 2023-09, Vol.14, p.1233772-1233772
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    Edited by: Gaetano Pandino, University of Catania, Italy
    Reviewed by: Charles A. Shapiro, University of Nebraska-Lincoln, United States; Guodong Liu, University of Florida, United States
  • Descrição: Nitrogen (N) is the most extracted and exported element by the soybean crop. In high yield tropical environments with irrigation, little is known about N accumulation in different soybean plant organs as well as the N balance. The objective of this study was to characterize soybean growth, N accumulation in plant organs, N balance, and N gap in a high yield tropical environment. This study was performed in a homogeneous field, in a soil with low organic matter, with 20 kg ha -1 of N, under furrow fertilization. Evaluations were performed ten times, temporally distributed from emergence to senescence. The soybean cultivar used was ‘RK7518 IPRO’ and was sown with row spacing of 0.45 m and a seeding rate of 300,000 plants ha -1 . Plant N partition, N from the biological N fixation (BNF), grain yield, crop harvest index (HI), N harvest index (NHI) with and without root contribution were evaluated. Also, at the grain filling stage the N gap was evaluated from the soil by difference between whole plant accumulated N and the amount of N from BNF. The average grain yield was 6,470 kg ha -1 and leads to a negative partial balance of N of -33.4 and -42.8 kg [N] ha -1 with and without roots, respectively. The N gap from the soil was 231.7 kg [N] ha -1 . It is recommended to adopt techniques that increase the efficiency of BNF and the soil N accumulation to balance these production systems in the medium to long term.
  • Editor: Frontiers Media S.A
  • Idioma: Inglês
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