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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
04/11/2019 |
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Data da última atualização: |
04/11/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SANTOS, L. H.; LOSS, A.; CANTON, L.; SOUZA, M.; FERREIRA, G. W.; KURTZ, C.; BRUNETTO, G.; LOURENZI, C. R.; LOVATO, P. E.; COMIN, J. J. |
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Título: |
Carbon and nitrogen content in granulometric fractions of organic matter in soil aggregates under no-tillage and conventional tillage planting systems for onions. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
IDESIA , Chile, v. 36, p. 1-9, 2018. |
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Idioma: |
Inglês |
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Conteúdo: |
Carbon (C) and nitrogen (N) content in granulometric fractions of soil organic matter (SOM) are sensitive indicators of soil quality changes
caused by management systems. This study evaluated the C and N content in granulometric fractions of SOM of aggregates, an Inceptisol
under onion grown in no-till vegetable farming systems (NTVFS) and conventional tillage systems (CTS), comparing them to a secondary
forest. Treatments consisted of soil cover crops, monocropped and intercropped with onions grown under NTVFS: spontaneous vegetation,
100% black oats; 100% rye; 100% oilseed radish; oilseed (14%) + rye (86%) intercrop and oilseed (14%) + oats (86%) intercrop. The same
evaluations were also performed in an area with onions grown under CTS for ± 37 years, and in secondary forest (± 30 years). Undeformed
soil samples were collected from 0-5, 5-10, and 10-20 cm deep soil layers, and aggregates were subsequently separated (8.00 mm > Ø ≥ 2.0
mm). Organic C (OC) and N of the granulometric fractions contents were quantified in aggregates, which were subdivided into particulate
fractions (POC and PN) and mineral-associated fractions (OCam and Nam). NTVFS promoted protection of SOM at the 0-5 cm depth
compared to CTS, as a result of higher POC content. Intercropped oats+oilseed and spontaneous vegetation contributed to an increase in PN
content compared to all other treatments under NTVFS. Monocropped and intercroppped oilseed radish caused an increase in Nam, which
was more effective than OCam to indicate differences among the systems. Conversion of areas from CTS to NTVFS promotes increases in
POC and PN content in the upper soil layer. NTVFS improves the quality of aggregates, and it may reduce damage caused by CTS MenosCarbon (C) and nitrogen (N) content in granulometric fractions of soil organic matter (SOM) are sensitive indicators of soil quality changes
caused by management systems. This study evaluated the C and N content in granulometric fractions of SOM of aggregates, an Inceptisol
under onion grown in no-till vegetable farming systems (NTVFS) and conventional tillage systems (CTS), comparing them to a secondary
forest. Treatments consisted of soil cover crops, monocropped and intercropped with onions grown under NTVFS: spontaneous vegetation,
100% black oats; 100% rye; 100% oilseed radish; oilseed (14%) + rye (86%) intercrop and oilseed (14%) + oats (86%) intercrop. The same
evaluations were also performed in an area with onions grown under CTS for ± 37 years, and in secondary forest (± 30 years). Undeformed
soil samples were collected from 0-5, 5-10, and 10-20 cm deep soil layers, and aggregates were subsequently separated (8.00 mm > Ø ≥ 2.0
mm). Organic C (OC) and N of the granulometric fractions contents were quantified in aggregates, which were subdivided into particulate
fractions (POC and PN) and mineral-associated fractions (OCam and Nam). NTVFS promoted protection of SOM at the 0-5 cm depth
compared to CTS, as a result of higher POC content. Intercropped oats+oilseed and spontaneous vegetation contributed to an increase in PN
content compared to all other treatments under NTVFS. Monocropped and intercroppped oilseed radish caused an increase in Nam, which
was more eff... Mostrar Tudo |
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Palavras-Chave: |
Allium cepa; Cover crops; intercropping; particulate carbon; particulate nitrogen. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02607naa a2200289 a 4500
001 1129078
005 2019-11-04
008 2018 bl uuuu u00u1 u #d
100 1 $aSANTOS, L. H.
245 $aCarbon and nitrogen content in granulometric fractions of organic matter in soil aggregates under no-tillage and conventional tillage planting systems for onions.$h[electronic resource]
260 $c2018
520 $aCarbon (C) and nitrogen (N) content in granulometric fractions of soil organic matter (SOM) are sensitive indicators of soil quality changes caused by management systems. This study evaluated the C and N content in granulometric fractions of SOM of aggregates, an Inceptisol under onion grown in no-till vegetable farming systems (NTVFS) and conventional tillage systems (CTS), comparing them to a secondary forest. Treatments consisted of soil cover crops, monocropped and intercropped with onions grown under NTVFS: spontaneous vegetation, 100% black oats; 100% rye; 100% oilseed radish; oilseed (14%) + rye (86%) intercrop and oilseed (14%) + oats (86%) intercrop. The same evaluations were also performed in an area with onions grown under CTS for ± 37 years, and in secondary forest (± 30 years). Undeformed soil samples were collected from 0-5, 5-10, and 10-20 cm deep soil layers, and aggregates were subsequently separated (8.00 mm > Ø ≥ 2.0 mm). Organic C (OC) and N of the granulometric fractions contents were quantified in aggregates, which were subdivided into particulate fractions (POC and PN) and mineral-associated fractions (OCam and Nam). NTVFS promoted protection of SOM at the 0-5 cm depth compared to CTS, as a result of higher POC content. Intercropped oats+oilseed and spontaneous vegetation contributed to an increase in PN content compared to all other treatments under NTVFS. Monocropped and intercroppped oilseed radish caused an increase in Nam, which was more effective than OCam to indicate differences among the systems. Conversion of areas from CTS to NTVFS promotes increases in POC and PN content in the upper soil layer. NTVFS improves the quality of aggregates, and it may reduce damage caused by CTS
653 $aAllium cepa
653 $aCover crops
653 $aintercropping
653 $aparticulate carbon
653 $aparticulate nitrogen
700 1 $aLOSS, A.
700 1 $aCANTON, L.
700 1 $aSOUZA, M.
700 1 $aFERREIRA, G. W.
700 1 $aKURTZ, C.
700 1 $aBRUNETTO, G.
700 1 $aLOURENZI, C. R.
700 1 $aLOVATO, P. E.
700 1 $aCOMIN, J. J.
773 $tIDESIA , Chile$gv. 36, p. 1-9, 2018.
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