AGRONOMIC TRAITS OF SORGHUM CULTIVARS AT THREE LEVELS OF NITROGEN FERTILIZER

Authors

  • Regis de Paula Oliveira
  • Aldi Fernandes de Souza França
  • Osvaldo Rodrigues Filho
  • Euclides Reuter de Oliveira
  • Beneval Rosa
  • Tatiana Vieira Soares
  • Susana Queiroz Santos Mello

Keywords:

Sorghum, nitrogen fertilization, agronomic valuation

Abstract

The objective of this study was to evaluate characteristics of four forage sorghum cultivars at three levels of nitrogen fertilizer in an Oxisoil. A randomized complete block design in a 4x3 factorial scheme (CMSXS 762, BRS 610, BR 700 and BR 506 hybrid cultivars combined with 50 kg.ha-1, 75 kg.ha-1 and 100 kg.ha-1 nitrogen levels). A Tukey test was used for comparison of treatment means. The yields of natural matter, with general average 59.31 t.ha-1, were significantly different among sorghum cultivars; but there was no difference caused by nitrogen levels in this trait. The dry matter yield mean (15.17 t.ha-1) did not differ among cultivars or nitrogen levels. As opposed, dry matter and panicle and stalk contents in the natural matter were different among cultivars as well as among N levels. The plant height (with general average 2.39 m) and stalk dry matter means were different only among cultivars. BR 700 and CMSXS 762 cultivars showed the best panicle/stalk/leaf ratio and the largest panicle percentage. Increased amounts of nitrogen resulted in increased panicle and decreased stalk percentage.

KEY-WORDS: Sorghum; nitrogen fertilization; agronomic valuation.

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Author Biography

Regis de Paula Oliveira

Departamento de Produção Animal, Escola de Veterinária, Universidade Federal de Goiás.
Caixa Postal 131, CEP 74001-970, Campus II, Goiânia, GO.

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Published

2007-11-06

How to Cite

OLIVEIRA, R. de P.; FRANÇA, A. F. de S.; RODRIGUES FILHO, O.; OLIVEIRA, E. R. de; ROSA, B.; SOARES, T. V.; MELLO, S. Q. S. AGRONOMIC TRAITS OF SORGHUM CULTIVARS AT THREE LEVELS OF NITROGEN FERTILIZER. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 35, n. 1, p. 45–53, 2007. Disponível em: https://revistas.ufg.br/pat/article/view/2288. Acesso em: 17 jul. 2024.

Issue

v. 35, n. 1, Jan./Apr. 2005

Section

Research Article

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