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- Title
EFEITO DA ADUBAÇÃO NITROGENADA E CORRELAÇÕES ENTRE PARÂMETROS MORFOGÊNICOS E ESTRUTURAIS EM PASTOS DE CAPIMBRAQUIÁRIA.
- Authors
de Sales, Eleuza Clarete Junqueira; Mendes Machado, Silvia Layse; Pinto Monção, Flávio; Mendes Ruas, José Reinaldo; dos Reis, Sidnei Tavares; Sampaio Rigueira, João Paulo; de Assis Pires, Daniel Ananias; Machado Viana, Maria Celuta; Aparecida Silva, Edilaine
- 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.
- Subjects
BRACHIARIA decumbens; MORPHOGENESIS; NITROGEN; FERTILIZATION (Biology); LEAVES
- Publication
Scientia Agraria Paranaensis, 2016, Vol 15, Issue 4, p427
- ISSN
1677-4310
- Publication type
Article
- DOI
10.18188/1983-1471/sap.v15n4p427-434