POTASSIUM FERTILIZATION OF SOYBEAN, PEARL MILLET, AND COTTON IN A NO-TILL ROTATION SYSTEM IN THE CERRADO REGION

Authors

  • Alberto Carlos de Campos Bernardi Embrapa Pecuária Sudeste
  • Juarez Patrício de Oliveira Júnior UFG
  • Wilson Mozena Leandro UFG
  • Tiago Gomes da Silva Mesquita UFG
  • Maria da Conceição Santana Carvalho Embrapa Algodão
  • Pedro Luiz de Freitas

Keywords:

Glycine max, Pennisetum, Gossypium hirsutum, fiber quality, agronomic efficiency

Abstract

The main objective of this study was to evaluate the efficiency of potassium fertilizer application, as related to rate, placement (in-row, broadcast, and split topdress) and time (before sowing, at sowing, and topdressing), in a soybean, pearl millet, and cotton no-till rotation system, in a typic dystrophic Red Latosol (Hapludox), in Turvelândia, Goiás State, Brazil (17o51’S, 50o18’W). The experimental design was a factorial randomized block, with 4 replications. Potassium source was KCl. Potassium was applied to soybean (0 kg ha-1, 30 kg ha-1, 60 kg ha-1, and 180 kg ha-1 of K2O) in the planting row or broadcasted before sowing, at sowing, or topdressed. For cotton, the K rates were 0 kg ha-1, 60 kg ha-1, 120 kg ha-1, and 240 kg ha-1 of K2O, applied before sowing and placed in the planting row, with none or one topdressing, or split in two applications. The pre-planting cotton K was applied in the pearl millet. There was no effect of potassium fertilization on soybean yield. As a cover crop, pearl millet used, more efficiently, the 60 kg ha-1 of K2O rate. Results showed that the best cotton agronomic efficiency was obtained with 146 kg ha-1 of K2O, supplied before sowing. Results also showed positive effects of potassium fertilization on cotton fiber quality.

 

KEY-WORDS: Glycine max; Pennisetum; Gossypium hirsutum; fiber quality; agronomic efficiency.

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Author Biographies

Juarez Patrício de Oliveira Júnior, UFG

Escola de Agronomia e Engenharia de Alimentos, Universidade Federal de Goiás – UFG, Goiânia, GO.

Wilson Mozena Leandro, UFG

Escola de Agronomia e Engenharia de Alimentos, Universidade Federal de Goiás – UFG, Goiânia, GO.

Tiago Gomes da Silva Mesquita, UFG

Escola de Agronomia e Engenharia de Alimentos, Universidade Federal de Goiás – UFG, Goiânia, GO.

Maria da Conceição Santana Carvalho, Embrapa Algodão

Embrapa Algodão, Núcleo de Goiás. Caixa Postal 714, 74001-970 Goiânia, GO.

Pedro Luiz de Freitas

Embrapa Solos, Rua Jardim Botânico, 1024, Rio de Janeiro, RJ, CEP:22460-000

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Published

2009-06-18

How to Cite

BERNARDI, A. C. de C.; OLIVEIRA JÚNIOR, J. P. de; LEANDRO, W. M.; MESQUITA, T. G. da S.; CARVALHO, M. da C. S.; FREITAS, P. L. de. POTASSIUM FERTILIZATION OF SOYBEAN, PEARL MILLET, AND COTTON IN A NO-TILL ROTATION SYSTEM IN THE CERRADO REGION. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 39, n. 2, p. 158–167, 2009. Disponível em: https://revistas.ufg.br/pat/article/view/3519. Acesso em: 17 jul. 2024.

Issue

v. 39, n. 2, Apr./Jun. 2009

Section

Research Article

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