Effect of nitrogen fertilization and correlations between morphogenesis and structural parameters of grass pastures

Authors

  • Eleuza Clarete Junqueira de Sales
  • Flávio Pinto Monção
  • Silvia Layse Mendes Machado
  • José Reinaldo Mendes Ruas
  • Sidnei Tavares dos Reis
  • João Paulo Sampaio Rigueira
  • Daniel Ananias de Assis Pires
  • Maria Celuta Machado Viana
  • Edilaine Aparecida Silva

DOI:

https://doi.org/10.18188/sap.v15i4.13498
Supporting Agencies
BANCO DO NORDESTE DO BRASIL

Keywords:

Brachiaria decumbens, forragem, manejo, nitrogênio

Abstract

The objective of this work was evaluate the association between morphogenetic and structural characteristics of Brachiaria decumbens managed at different doses of nitrogen. The experimental design was a randomized block with four replications. Four levels of nitrogen fertilization were evaluated: 100; 200; 300 and 400 kg of N ha-1 as urea, divided in two doses during the rainy season (January to March) and the control treatment without fertilization. There was an increase in leaf appearance rate (LAR), leaf elongation rate (LER) and tiller number (NP) up to 21.4%; 23.8% and 50.5% for the highest dose of N (400 kg N ha-1) compared to the control group, respectively. There was a positive correlation (r = 0.53) (p<0.05) between the LER and leaf life span (LLS). The phyllochron showed high negative correlation (r = -0.81) (p<0.0001) with LAR. Regarding the final length of the stem, there was no correlation effect (p>0.05) with other analyzed characteristics.

Published

07-12-2016

How to Cite

SALES, E. C. J. de; MONÇÃO, F. P.; MACHADO, S. L. M.; RUAS, J. R. M.; REIS, S. T. dos; RIGUEIRA, J. P. S.; PIRES, D. A. de A.; VIANA, M. C. M.; SILVA, E. A. Effect of nitrogen fertilization and correlations between morphogenesis and structural parameters of grass pastures. Scientia Agraria Paranaensis, [S. l.], v. 15, n. 4, p. 427–434, 2016. DOI: 10.18188/sap.v15i4.13498. Disponível em: https://e-revista.unioeste.br/index.php/scientiaagraria/article/view/13498. Acesso em: 18 jun. 2025.

Issue

Section

Scientific Article