Initial height and nitrogen fertilization on deferred signalgrass

Authors

  • Arejacy Antônio Sobral Silva Instituto Federal de São Paulo
  • Dilermando Miranda da Fonseca Universidade Federal de Viçosa
  • Manoel Eduardo Rozalino Santos Universidade Federal de Uberlândia
  • Braulio Maia de Lana Sousa Universidade Federal de Sergipe
  • Virgílio Mesquita Gomes Universidade Federal de Viçosa
  • Reinaldo Bertola Cantarutti Universidade Federal de Viçosa

DOI:

https://doi.org/10.14393/BJ-v31n6a2015-26277

Keywords:

Brachiaria decumbens, production seasonality, sward structure, tillering

Abstract

Thus study was conducted with the objective of evaluating production and forage characteristics of Signalgrass (Brachiaria decumbens cv. Basilisk) deferred at different initial heights and nitrogen doses. Three initial sward heights (low - 10 cm, medium - 20 cm and high - 30 cm), three nitrogen doses (40, 80 and 120 kg/ha) and a control treatment, of no fertilization were evaluated. The experimental design utilized was of completely randomized blocks with three replications, in a subdivided-plot arrangement. There was no interaction between sward initial height and nitrogen dose for the variables analyzed. The Signalgrass deferred at an elevated initial height presented greater masses of forage, live stem, dead stem and dead leaves; higher percentage of dead stem and falling rate; and lower number of vegetative tillers, percentage of live leaves and live leaf/live stem ratio. Elevation in the nitrogen dose increase along with the number of live and vegetative tillers; masses of forage, live stem, dead stem, dead leaves and live leaves; percentage of live stem; and live tissue/dead tissue ratio; and reduced the percentage of dead leaves and the live leaf/live stem ratio. Signalgrass can be deferred at low and medium initial heights and varied nitrogen doses, according to the objectives and possibilities of the farmer.

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Published

2015-11-17

How to Cite

SOBRAL SILVA, A.A., MIRANDA DA FONSECA, D., ROZALINO SANTOS, M.E., MAIA DE LANA SOUSA, B., MESQUITA GOMES, V. and BERTOLA CANTARUTTI, R., 2015. Initial height and nitrogen fertilization on deferred signalgrass . Bioscience Journal [online], vol. 31, no. 6, pp. 1671–1681. [Accessed20 May 2022]. DOI 10.14393/BJ-v31n6a2015-26277. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/26277.

Issue

Section

Agricultural Sciences