EFFICIENCY OF SIMPLE SUPER PHOSPHATE IN THE VETIVER GRASS DEVELOPMENT SUBJECTED TO SOIL BIOENGINEERING

Authors

  • Renisson Neponuceno de Araújo Filho Federal University of Sergipe image/svg+xml
  • Francisco Sandro Rodrigues Holanda Departamento de Engenharia Agronômica/ UFS
  • Ighor Diaquino Matias Santana
  • Tiago de Oliveira Santos Departamento de Engenharia Agronômica/ UFS
  • Dário Costa Primo Departamento de Energia Nuclear

Keywords:

Bank erosion. Chrysopogon zizanioides. Phosphorus. Root system.

Abstract

The development of vetiver grass (Chrysopogon zizanioides L.) has been evaluated under different levels of phosphorus on slopes of the right-side bank of the San Francisco River, in the municipality of Amparo do São Francisco, SE. Techniques of soil bioengineering were used, characterized by the combination of vegetated riprap with stakes, seedlings of vetiver grass and sediment retainers. The experimental design was randomized blocks with five doses (0, 4, 8, 12, and 16 g pit-1 of simple superphosphate) and five replicates. The growth of vetiver seedlings were observed in periods of 30, 60, 90, e 180 days, carrying out the following parameters: number of roots, external root surface, root density, root length, root length density, root and shoot dry weight, root and shoot fresh weight, and shoot length, at each evaluation period. The phosphorus doses and periods of morphological development interacted in all variables of plant biomass mentioned above. Higher superphosphate doses than 9.0 g pit-1 did not offer advantages in terms of cost-benefit for the production of vetiver seedings.

Author Biographies

  • Renisson Neponuceno de Araújo Filho, Federal University of Sergipe
    Doutorando - UFRPE
  • Francisco Sandro Rodrigues Holanda, Departamento de Engenharia Agronômica/ UFS
    Professor associado da UFS
  • Ighor Diaquino Matias Santana
    Departamento de Engenharia Agronômica/ UFS
  • Tiago de Oliveira Santos, Departamento de Engenharia Agronômica/ UFS
    Mestre em agroecossistemas - UFS
  • Dário Costa Primo, Departamento de Energia Nuclear
    Doutor - DEN

Published

19-05-2015

Issue

Section

Agronomy