Use este identificador para citar ou linkar para este item: http://repositorio.bc.ufg.br/handle/ri/13878
Tipo do documento: Artigo
Título: Biochar improves fertility of a clay soil in the brazilian savannah: short term effects and impact on rice yield
Autor: Carvalho, Márcia Thais de Melo
Madari, Beata Emoke
Bastiaans, Lammert
Van Oort, Pepijn A. J.
Heinemann, Alexandre Bryan
Silva, Mellissa Ananias Soler da
Maia, Aline de Holanda Nunes
Meinke, Holger
Abstract: The objective of this study was to report single season effects of wood biochar (char) application coupled with N fer- tilization on soil chemical properties, aerobic rice growth and grain yield in a clayey Rhodic Ferralsol in the Brazilian Savannah. Char application effected an increase in soil pH, K, Ca, Mg, CEC, Mn and nitrate while decreasing Al content and potential acidity of soils. No distinct effect of char application on grain yield of aerobic rice was observed. We believe that soil properties impacted by char application were inconsequential for rice yields because neither wa- ter, low pH, nor the availability of K or P were limiting factors for rice production. Rate of char above 16 Mg ha −1 reduced leaf area index and total shoot dry matter by 72 days after sowing. The number of panicles infected by rice blast decreased with increasing char rate. Increased dry matter beyond the remobilization capacity of the crop, and high number of panicles infected by rice blast were the likely cause of the lower grain yield observed when more than 60 kg N ha −1 was applied. The optimal rate of N was 46 kg ha −1 and resulted in a rice grain yield above 3 Mg ha −1 .
Palavras-chave: Aerobic system
Oryza sativa
Carbonised biomass
Ferralsol
Nitrogen
Oxisol
País: Alemanha
Unidade acadêmica: Escola de Agronomia e de Engenharia de Alimentos - EAEA (RG)
Citação: CARVALHO, Márcia T. de Melo; MADARI, Beáta E.; BASTIAANS, Lammert; OORT VAN, Pepijn A. J.; HEINEMANN, Alexandre B.; SILVA, Mellissa A. S. da; MAIA, Aline de Holanda Nunes; MEINKE, Holger. Biochar improves fertility of a clay soil in the brazilian savannah: short term effects and impact on rice yield. Journal of Agriculture and Rural Development in the Tropics and Subtropics, Witzenhausen, v. 114, n. 2, p. 101-107, 2013.
Tipo de acesso: Acesso Aberto
URI: http://repositorio.bc.ufg.br/handle/ri/13878
Data de publicação: 2013
Aparece nas coleções:EA - Artigos publicados em periódicos

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