Phosphorus analysis in soil under herbaceous perennial leguminous cover by nuclear magnetic spectroscopy
The availability and the reserves of organic phosphorus are controlled by its mineralization rate and are also influenced by changes in soil management. The objective of this study was to evaluate the influence of soil covering with different leguminous plant on soil organic P by 31P-NMR spectroscopy. Alkaline soil extracts were obtained from two depths (0-5 and 5-10 cm) of an Ultisol cultivated with herbaceous perennial leguminous plants (Arachis pintoi, Pueraria phaseoloides, Macroptilium atropurpureum). In an adjacent area, samples of the same soil cover with a secondary tropical forest and grass (Panicum maximum) were also collected. The leguminous management was divided into with removal and without removal of shoot parts after cut on soil surface. Phosphate monoesters are the dominant P species in all soil samples and P diesters accumulated on the superficial layer of secondary forest soil. The P amount of this fraction is higher for the legume covered soil when compared with the grass covered soil. The permanence of leguminous plants on the topsoil after the cut promoted an increase in P diester/P monoester ratios. These findings can be accounted for an enhancement of P availability to plants in soils cultivated with leguminous plants.
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Embrapa Secretaria de Pesquisa e Desenvolvimento
2004
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oai:scielo:S0100-204X20040006000112004-08-03Phosphorus analysis in soil under herbaceous perennial leguminous cover by nuclear magnetic spectroscopyCanellas,Luciano PasqualotoEspíndola,José Antônio AzevedoGuerra,José Guilherme MarinhoTeixeira,Marcelo GrandiVelloso,Ary Carlos XavierRumjanek,Victor Marcos cultivation deforestation cover crops The availability and the reserves of organic phosphorus are controlled by its mineralization rate and are also influenced by changes in soil management. The objective of this study was to evaluate the influence of soil covering with different leguminous plant on soil organic P by 31P-NMR spectroscopy. Alkaline soil extracts were obtained from two depths (0-5 and 5-10 cm) of an Ultisol cultivated with herbaceous perennial leguminous plants (Arachis pintoi, Pueraria phaseoloides, Macroptilium atropurpureum). In an adjacent area, samples of the same soil cover with a secondary tropical forest and grass (Panicum maximum) were also collected. The leguminous management was divided into with removal and without removal of shoot parts after cut on soil surface. Phosphate monoesters are the dominant P species in all soil samples and P diesters accumulated on the superficial layer of secondary forest soil. The P amount of this fraction is higher for the legume covered soil when compared with the grass covered soil. The permanence of leguminous plants on the topsoil after the cut promoted an increase in P diester/P monoester ratios. These findings can be accounted for an enhancement of P availability to plants in soils cultivated with leguminous plants.info:eu-repo/semantics/openAccessEmbrapa Secretaria de Pesquisa e DesenvolvimentoPesquisa Agropecuária BrasileiraPesquisa Agropecuária Brasileira v.39 n.6 20042004-06-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2004000600011en10.1590/S0100-204X2004000600011 |
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Canellas,Luciano Pasqualoto Espíndola,José Antônio Azevedo Guerra,José Guilherme Marinho Teixeira,Marcelo Grandi Velloso,Ary Carlos Xavier Rumjanek,Victor Marcos |
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Canellas,Luciano Pasqualoto Espíndola,José Antônio Azevedo Guerra,José Guilherme Marinho Teixeira,Marcelo Grandi Velloso,Ary Carlos Xavier Rumjanek,Victor Marcos Phosphorus analysis in soil under herbaceous perennial leguminous cover by nuclear magnetic spectroscopy |
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Canellas,Luciano Pasqualoto Espíndola,José Antônio Azevedo Guerra,José Guilherme Marinho Teixeira,Marcelo Grandi Velloso,Ary Carlos Xavier Rumjanek,Victor Marcos |
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Canellas,Luciano Pasqualoto |
title |
Phosphorus analysis in soil under herbaceous perennial leguminous cover by nuclear magnetic spectroscopy |
title_short |
Phosphorus analysis in soil under herbaceous perennial leguminous cover by nuclear magnetic spectroscopy |
title_full |
Phosphorus analysis in soil under herbaceous perennial leguminous cover by nuclear magnetic spectroscopy |
title_fullStr |
Phosphorus analysis in soil under herbaceous perennial leguminous cover by nuclear magnetic spectroscopy |
title_full_unstemmed |
Phosphorus analysis in soil under herbaceous perennial leguminous cover by nuclear magnetic spectroscopy |
title_sort |
phosphorus analysis in soil under herbaceous perennial leguminous cover by nuclear magnetic spectroscopy |
description |
The availability and the reserves of organic phosphorus are controlled by its mineralization rate and are also influenced by changes in soil management. The objective of this study was to evaluate the influence of soil covering with different leguminous plant on soil organic P by 31P-NMR spectroscopy. Alkaline soil extracts were obtained from two depths (0-5 and 5-10 cm) of an Ultisol cultivated with herbaceous perennial leguminous plants (Arachis pintoi, Pueraria phaseoloides, Macroptilium atropurpureum). In an adjacent area, samples of the same soil cover with a secondary tropical forest and grass (Panicum maximum) were also collected. The leguminous management was divided into with removal and without removal of shoot parts after cut on soil surface. Phosphate monoesters are the dominant P species in all soil samples and P diesters accumulated on the superficial layer of secondary forest soil. The P amount of this fraction is higher for the legume covered soil when compared with the grass covered soil. The permanence of leguminous plants on the topsoil after the cut promoted an increase in P diester/P monoester ratios. These findings can be accounted for an enhancement of P availability to plants in soils cultivated with leguminous plants. |
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Embrapa Secretaria de Pesquisa e Desenvolvimento |
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2004 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2004000600011 |
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