BIOMASS DECOMPOSITION AND NUTRIENT RELEASE OF BRACHIARIA AND GUINEA GRASS UNDER BRAZILIAN SAVANNAH CONDITIONS

Authors

  • Tatiely Gomes Bernardes UFG
  • Pedro Marques da Silveira Embrapa Arroz e Fijão
  • Marcos Antônio Machado Mesquita UEG
  • Renata Alves de Aguiar UFG
  • Glaucia Machado Mesquita UEG

Keywords:

Brachiaria brizantha, Panicum maximum, decomposition rate, macronutrients accumulation, no-tillage system

Abstract

The objective of this research was to evaluate the accumulation and release of nutrients from the dry biomass of brachiaria (Brachiaria brizantha) and guinea grass (Panicum maximum) used as cover crops in a no-tillage system, under Brazilian savannah conditions. The experiment was carried out at Embrapa Arroz e Feijão (Fazenda Capivara), in Santo Antônio de Goiás, Goiás State, Brazil, in a dystrophic Red Oxisol. A randomized block design, with four repetitions, in a split plot scheme in time, was adopted. At the flowering stage, plants were cut and kept on the soil, and the productivity of dry biomass, and nutrient accumulation, decomposition and liberation were evaluated at 0, 15, 30, 45, 60, and 75 days. The biomass yield was 16,643 kg ha-1, for brachiaria, and 18,244 kg ha-1, for guinea grass. For both cover crops, N was the most accumulated nutrient. Among the macronutrients, K showed the highest release rate (70% and 59%, respectively for guinea grass and brachiaria).

KEY-WORDS: Brachiaria brizantha; Panicum maximum; decomposition rate; macronutrients accumulation; no-tillage system.

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Author Biographies

Tatiely Gomes Bernardes, UFG

Doutoranda em agronomia na Escola de Agronomia e Engenharia de Alimentos da UFG.

Pedro Marques da Silveira, Embrapa Arroz e Fijão

Pesquisador na Embrapa na área de solos e fertilidade

Marcos Antônio Machado Mesquita, UEG

Professor substituto de fruticultura na unidade de Édeia na UEG

Renata Alves de Aguiar, UFG

Doutoranda em agronomia pela UFG

Glaucia Machado Mesquita, UEG

Professora substituta de Horticultura na UEG

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Published

2010-10-07

How to Cite

BERNARDES, T. G.; SILVEIRA, P. M. da; MESQUITA, M. A. M.; AGUIAR, R. A. de; MESQUITA, G. M. BIOMASS DECOMPOSITION AND NUTRIENT RELEASE OF BRACHIARIA AND GUINEA GRASS UNDER BRAZILIAN SAVANNAH CONDITIONS. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 40, n. 3, p. 370–377, 2010. Disponível em: https://revistas.ufg.br/pat/article/view/5584. Acesso em: 22 nov. 2024.

Issue

v. 40, n. 3, Jul./Sep. 2010

Section

Crop Science

License

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