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Artigo
Phosphorus forms in ultisol submitted to burning and trituration of vegetation in eastern Amazon
The use of fire to prepare agricultural areas is a technique still used by small farmers in eastern Amazon. This type of management changes the dynamics of soil nutrients, especially phosphorus, which constitutes the most limiting nutrient for crop production in tropical soils. This study was carrie...
Autor principal: | Farias, Samuel Christian Cohen |
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Outros Autores: | Silva Júnior, Mário Lopes da, Ruivo, Maria de Lourdes Pinheiro, Rodrigues, Possidônio Guimarães, Melo, Vânia Silva de, Costa, Adriane da Rocha, Souza Júnior, João Cardoso de |
Grau: | Artigo |
Idioma: | eng |
Publicado em: |
Museu Paraense Emilio Goeldi
2018
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Assuntos: | |
Acesso em linha: |
http://repositorio.museu-goeldi.br/handle/mgoeldi/1359 |
Resumo: |
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The use of fire to prepare agricultural areas is a technique still used by small farmers in eastern Amazon. This type of management changes the dynamics of soil nutrients, especially phosphorus, which constitutes the most limiting nutrient for crop production in tropical soils. This study was carried out to evaluate changes in phosphorus forms in an Argissolo Amarelo Distrófico (Ultisol) submitted to burning and trituration of secondary forest in eastern Amazon. The evaluated systems were: slashand-burn of vegetation; slash-and-mulch of vegetation; and secondary vegetation. The labile, moderately labile, moderately recalcitrant, available and total phosphorus fractions were assessed at the soil depths of 0.00-0.05, 0.05-0.10 and 0.10-0.20 m. The results showed a predominance of soluble P in acid (moderately labile P) over other forms in all management systems. The management systems influence the content and distribution of the forms of P, where the slash-and-mulch system presented the prevalence of the labile fraction, and the slash-and-burn system contained less labile forms. The slashand-mulch system favored the accumulation of labile P and total organic P. |