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Registro Completo |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
08/07/2018 |
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Data da última atualização: |
08/07/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SANTOS, L. H.; LOSS, A.; LOURENZI, C. R.; SOUZA, M.; GONZATTO, R.; KURTZ, C.; BRUNETTO, G.; COMIN, J. J. |
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Título: |
Total nitrogen and humic substances in aggregates of soils with onion crops under no-tillage and conventional system. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
REVISTA COLOMBIANA DE CIENCIAS HORTÍCOLAS, Bogotá, Colombia, v. 12, n. 1, p. 166-174, 2018. |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to evaluate the soil total nitrogen (TN), and N contents in humic substances
(HS) of the organic matter in aggregates of soils cultivated with onion under no-till system for horticulture
(NTSH) and conventional tillage system (CTS), comparing with an area of forest. The evaluated treatments
were natural vegetation (control), 100% black oats, 100% rye, 100% oilseed radish, intercrop of oilseed (14%)
+ rye (86%), intercrop of oilseed (14%) + black oats (86%), area under CTS of onion for ±37 years, and area
with secondary forest for ±30 years. Five years after the NTSH implementation, undisturbed soil samples
from the layers 0-5 cm, 5-10 cm, and 10-20 cm were collected; these samples presented aggregate sizes between 2.0 mm and 8.00 mm. The TN, and N contents of the HS were subdivided into fulvic acids (N-FA), humic acids (N-HA), and humin (N-HU) fractions. The change from CTS to NTSH increases the TN and N-HU
contents in the 0-5 cm soil layer. The intercrop of oats and oilseed radish, used as soil plant cover species in
NTSH, presented a greater increase in N-HU (0-20 cm) than the other treatments. Black oats, and naturalvegetation presented a greater increased in N-HA, and N-FA contents, respectively, in the 10-20 cm layer, than the other treatments in NTSH and CTS. CTS with millet as soil plant cover presented a greater increase in N-FA (0-20
cm) contents than the NTSH treatments. |
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Palavras-Chave: |
aggregation; Allium cepa L; cover plants; humic acids; soil nitrogen; tillage system. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02266naa a2200277 a 4500
001 1127478
005 2018-07-08
008 2018 bl uuuu u00u1 u #d
100 1 $aSANTOS, L. H.
245 $aTotal nitrogen and humic substances in aggregates of soils with onion crops under no-tillage and conventional system.$h[electronic resource]
260 $c2018
520 $aThe objective of this study was to evaluate the soil total nitrogen (TN), and N contents in humic substances (HS) of the organic matter in aggregates of soils cultivated with onion under no-till system for horticulture (NTSH) and conventional tillage system (CTS), comparing with an area of forest. The evaluated treatments were natural vegetation (control), 100% black oats, 100% rye, 100% oilseed radish, intercrop of oilseed (14%) + rye (86%), intercrop of oilseed (14%) + black oats (86%), area under CTS of onion for ±37 years, and area with secondary forest for ±30 years. Five years after the NTSH implementation, undisturbed soil samples from the layers 0-5 cm, 5-10 cm, and 10-20 cm were collected; these samples presented aggregate sizes between 2.0 mm and 8.00 mm. The TN, and N contents of the HS were subdivided into fulvic acids (N-FA), humic acids (N-HA), and humin (N-HU) fractions. The change from CTS to NTSH increases the TN and N-HU contents in the 0-5 cm soil layer. The intercrop of oats and oilseed radish, used as soil plant cover species in NTSH, presented a greater increase in N-HU (0-20 cm) than the other treatments. Black oats, and naturalvegetation presented a greater increased in N-HA, and N-FA contents, respectively, in the 10-20 cm layer, than the other treatments in NTSH and CTS. CTS with millet as soil plant cover presented a greater increase in N-FA (0-20 cm) contents than the NTSH treatments.
653 $aaggregation
653 $aAllium cepa L
653 $acover plants
653 $ahumic acids
653 $asoil nitrogen
653 $atillage system
700 1 $aLOSS, A.
700 1 $aLOURENZI, C. R.
700 1 $aSOUZA, M.
700 1 $aGONZATTO, R.
700 1 $aKURTZ, C.
700 1 $aBRUNETTO, G.
700 1 $aCOMIN, J. J.
773 $tREVISTA COLOMBIANA DE CIENCIAS HORTÍCOLAS, Bogotá, Colombia$gv. 12, n. 1, p. 166-174, 2018.
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