Soil fertility and upland rice yield after biochar application in the Cerrado

Pesquisa Agropecuária Brasileira

Fabiano André Petter²  Beáta Emöke Madari¹  Mellissa Ananias Soler Da Silva¹  Marco Aurélio Carbone Carneiro¹  Márcia Thaís De Melo Carvalho¹  Ben Hur Marimon Júnior¹  Leandro Pereira Pacheco² 

[1] ,Universidade Federal do Piauí Departamento de Agronomia Bom Jesus PI ,Brazil

关键词: biochar;    macronutrients;    plant biomass;    plant growth;    soil acidity;    rice yield;    "biochar";    macronutrientes;    fitomassa;    crescimento de planta;    acidez do solo;    produtividade do arroz;   

DOI  :  10.1590/S0100-204X2012000500010

来源: SciELO

【 摘 要 】

The objective of this work was to evaluate the effect of biochar made from Eucalyptus on soil fertility, and on the yield and development of upland rice. The experiment was performed during two years in a randomized block design with four replicates, in a sandy loam Dystric Plinthosol. Four doses of NPK 05-25-15, annually distributed in stripes (0, 100, 200 and 300 kg ha-1), and four doses of biochar (0, 8, 16 and 32 Mg ha-1), applied once in the first year - alone or with NPK - were evaluated. In the first year, biochar positively affected soil fertility [total organic carbon (TOC), Ca, P, Al, H+Al, and pH], at 0-10 cm soil depth, and it was the only factor with significant effect on yield. In the second year, the effect of biochar diminished or was overcome by the fertilizer. TOC moved down in the soil profile to the 0-20 cm depth, influencing K availability in this layer. In the second year, there was a significant interaction between biochar and the fertilizer on plant growth and biomass dry matter accumulation.

【 授权许可】

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