OPTIMAL SIZE OF PLOTS FOR THE CULTURE OF SUNFLOWER CROP IN THREE SPATIAL ARRANGEMENTS OF PLANTS

Authors

  • Ana Maria Pereira Bispo dos Santos Centro de Ciências Agrárias, Ambientais e Biológicas, UFRB, Rua Rui Barbosa, 710, Centro, Cruz das Almas (BA), CEP 44380-000.
  • Clovis Pereira Peixoto Centro de Ciências Agrárias, Ambientais e Biológicas, UFRB, Rua Rui Barbosa, 710, Centro, Cruz das Almas (BA), CEP 44380-000.
  • Ademir Trindade Almeida Centro de Ciências Agrárias, Ambientais e Biológicas, UFRB, Rua Rui Barbosa, 710, Centro, Cruz das Almas (BA), CEP 44380-000.
  • Jamile Maria da Silva dos Santos Centro de Ciências Agrárias, Ambientais e Biológicas, UFRB, Rua Rui Barbosa, 710, Centro, Cruz das Almas (BA), CEP 44380-000.
  • Gisele da Silva Machado Centro de Ciências Agrárias, Ambientais e Biológicas, UFRB, Rua Rui Barbosa, 710, Centro, Cruz das Almas (BA), CEP 44380-000.

DOI:

https://doi.org/10.1590/1983-21252015v28n430rc

Keywords:

Uniformity test. Experimental error. Helianthus annus L.. Experimental accuracy. Experimental unit.

Abstract

The objective of this study was to evaluate the optimum plot size to three sunflower hybrids in three spatial arrangements of plants. The uniformity test was installed in the experimental field of the Federal University of Recôncavo of Bahia, in Cruz das Almas, Brazil, in 2012. The plots were composed of six lines of 36 m, which were willing three spatial arrangements of plants: A1 (0,45 m x 0,49 m); A2 (0,70 m x 0,32 m) and A3 (0,90 m x 0,25 m), and each arrangement were distributed three sunflower hybrids: Hélio 250, Hélio 253 e Aguara 3. For the evaluation of the optimal plot size, at 110 days after sowing was harvested a sample of 180 basic units (plants) per plot, in which were evaluated the final plant height, the final diameter of the rod and the diameter of the chapter. Thirty-one plots sizes of three hybrids were simulated and for each variable assessed, wherein each plant was considered as a basic unit. The estimation of optimum plot size to the sunflower crop was calculated by the method of modified curvature maximum. The combined use of hybrid H253, installed in the arrangement 0.45 m x 0.49 m, promotes obtainment the greatest value of curvature maximum it was estimated the optimum plot size of six plants.

Published

19-11-2015

Issue

Section

Technical Note