Forage accumulation and morphogenesis of Trachypogon plumosus under phosphorus levels

Authors

  • Newton de Lucena Costa Embrapa Roraima
  • Anibal de Moraes
  • Paulo César de Faccio Carvalho
  • João Avelar Magalhães

DOI:

https://doi.org/10.22256/pubvet.v10n5.388-393

Keywords:

dry matter, leaves, tillering, senescence

Abstract

The effect of phosphorus levels (0, 30, 60, 90 and 120 kg of P2O5 ha-1) on green dry matter (GDM) yield and morphogenetic and structural characteristics of Trachypogon plumosus was evaluated under field conditions. Phosphorus fertilization increased significantly GDM yields, P concentrations, number of tillers (NT), number of leaves plant-1 (NLP), medium blade length (MBL), leaf area index (LAI), leaf appearance (LAR) and elongation rates (LER). Maximum GDM yields, LAR, LER, NT, NLP, LAI and MBL were obtained with the application of 91.3; 90.7; 84.3; 109.1; 92.3; 93.9 and 70.7kg of P2O5 ha-1, respectively. The P critic level, related to 80% of GDM maximum production, was estimated at 1.62 g kg-1. The P efficiency utilization was inversely proportional to the P rates applied, while the opposite occurring to the leaf senescence rate.

Published

2016-04-15

Issue

Section

Pastagem e forragicultura

How to Cite

Forage accumulation and morphogenesis of Trachypogon plumosus under phosphorus levels. (2016). Pubvet, 10(05). https://doi.org/10.22256/pubvet.v10n5.388-393

Most read articles by the same author(s)

<< < 3 4 5 6 7 8 9 > >>