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| Registros recuperados : 161 | |
| Registros recuperados : 161 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
01/12/2016 |
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Data da última atualização: |
24/05/2017 |
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Autoria: |
SEBEN JUNIOR, G. de F.; CORÁ, J. E.; LAL, R. |
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Afiliação: |
GETULIO DE FREITAS SEBEM JUNIOR, UEMS; JOSÉ EDUARDO CORÁ, Universidade Estadual Paulista; RATTAN LAL, Ohio State University. |
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Título: |
Soil aggregation according to the dynamics of carbon and nitrogen in soil under different cropping systems. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 51, n. 9, p. 1652-1659, set. 2016. |
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Idioma: |
Inglês |
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Notas: |
Título em português: Agregação do solo de acordo com a dinâmica de carbono e nitrogênio em solo sob diferentes sistemas de cultivo. |
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Conteúdo: |
The objective of this work was to evaluate total soil carbon and nitrogen, as well as their contents in particulate and mineral-associated C fractions; to determine C stock and sequestration rates in the soil; and to verify the effect of C and N contents on soil aggregation, using different crop rotations and crop sequences under no-tillage. The study was carried out for nine years in a clayey Oxisol. The treatments consisted of different cropping systems formed by the combination of three summer crops (cropped until March) ? corn (Zea mays) monocropping, soybean (Glycine max) monocropping, and soybean/corn rotation ? and seven second crops (crop successions). Soil samples were taken at the 0.00?0.10-m layer for physical fractionation of C and N, and to determine soil aggregation by the wet method. Soybean monocropping increased C and N in particulate C fraction, while the crop systems with corn monocropping x pigeon pea (Cajanus cajan), corn monocropping x sun hemp (Crotalaria juncea), and soybean monocropping x corn as a crop succession increased total C in the soil. Greater rates of soil C sequestration were observed with soybean/corn rotation and with soybean monocropping, as well as with sun hemp as a second crop. The increase in total N increases soil C stock. Soil aggregation was most affected at particulate C fraction. Increases in soil N promote C addition to particulate fraction and enhance soil aggregation. |
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Palavras-Chave: |
Agregados do solo; Estoque de carbono; Matéria orgânica do solo; Sequestro de carbono. |
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Thesagro: |
Planta de cobertura; Rotação de cultura. |
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Thesaurus NAL: |
Carbon sequestration; Carbon sinks; Cover crops; Crop rotation; Soil aggregates; Soil organic matter. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/150937/1/Soil-aggregatiuon-according.pdf
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Marc: |
LEADER 02489naa a2200301 a 4500
001 2057609
005 2017-05-24
008 2016 bl uuuu u00u1 u #d
100 1 $aSEBEN JUNIOR, G. de F.
245 $aSoil aggregation according to the dynamics of carbon and nitrogen in soil under different cropping systems.
260 $c2016
500 $aTítulo em português: Agregação do solo de acordo com a dinâmica de carbono e nitrogênio em solo sob diferentes sistemas de cultivo.
520 $aThe objective of this work was to evaluate total soil carbon and nitrogen, as well as their contents in particulate and mineral-associated C fractions; to determine C stock and sequestration rates in the soil; and to verify the effect of C and N contents on soil aggregation, using different crop rotations and crop sequences under no-tillage. The study was carried out for nine years in a clayey Oxisol. The treatments consisted of different cropping systems formed by the combination of three summer crops (cropped until March) ? corn (Zea mays) monocropping, soybean (Glycine max) monocropping, and soybean/corn rotation ? and seven second crops (crop successions). Soil samples were taken at the 0.00?0.10-m layer for physical fractionation of C and N, and to determine soil aggregation by the wet method. Soybean monocropping increased C and N in particulate C fraction, while the crop systems with corn monocropping x pigeon pea (Cajanus cajan), corn monocropping x sun hemp (Crotalaria juncea), and soybean monocropping x corn as a crop succession increased total C in the soil. Greater rates of soil C sequestration were observed with soybean/corn rotation and with soybean monocropping, as well as with sun hemp as a second crop. The increase in total N increases soil C stock. Soil aggregation was most affected at particulate C fraction. Increases in soil N promote C addition to particulate fraction and enhance soil aggregation.
650 $aCarbon sequestration
650 $aCarbon sinks
650 $aCover crops
650 $aCrop rotation
650 $aSoil aggregates
650 $aSoil organic matter
650 $aPlanta de cobertura
650 $aRotação de cultura
653 $aAgregados do solo
653 $aEstoque de carbono
653 $aMatéria orgânica do solo
653 $aSequestro de carbono
700 1 $aCORÁ, J. E.
700 1 $aLAL, R.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 51, n. 9, p. 1652-1659, set. 2016.
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Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
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