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Rice straw incorporated just before soil flooding increases acetic acid formation and decreases available nitrogen Rev. Bras. Ciênc. Solo
Knoblauch,Ronaldir; Ernani,Paulo Roberto; Deschamps,Francisco Carlos; Gatiboni,Luciano Colpo; Walker,Timothy Wayne; Lourenço,Késia Silva; Martins,Acácio Agostinho; Pegoraro,Angélica.
Incorporation of rice straw into the soil just before flooding for water-seeded rice can immobilize mineral nitrogen (N) and lead to the production of acetic acid harmful to the rice seedlings, which negatively affects grain yield. This study aimed to evaluate the formation of organic acids and variation in pH and to quantify the mineral N concentration in the soil as a function of different times of incorporation of rice straw or of ashes from burning the straw before flooding. The experiment was carried out in a greenhouse using an Inceptisol (Typic Haplaquept) soil. The treatments were as follows: control (no straw or ash); incorporation of ashes from previous straw burning; rice straw incorporated to drained soil 60 days before flooding; straw...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oryza sativa L; Straw management; Water-seeded system; Flooded soils.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000100017
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