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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
22/07/2015 |
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Data da última atualização: |
29/03/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
NASCENTE, A. S.; LI, Y.; CRUSCIOL, C. A. C. |
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Afiliação: |
ADRIANO STEPHAN NASCENTE, CNPAF; YUNCONG LI, UNIVERSITY OF FLORIDA; CARLOS ALEXANDRE COSTA CRUSCIOL, UNESP, Botucatu-SP. |
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Título: |
Soil aggregation, organic carbon concentration, and soil bulk density as affected by cover crop species in a no-tillage system. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 39, n. 3, p. 871-879, maio/jun. 2015. |
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DOI: |
10.1590/01000683rbcs20140388 |
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Idioma: |
Inglês |
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Conteúdo: |
Soil aggregation and the distribution of total organic carbon (TOC) may be affected by soil tillage and cover crops. The objective of this study was to determine the effects of crop rotation with cover crops on soil aggregation, TOC concentration in the soil aggregate fractions, and soil bulk density under a no-tillage system (NTS) and conventional tillage system (CTS, one plowing and two disking). This was a three-year study with cover crop/rice/cover crop/rice rotations in the Brazilian Cerrado. A randomized block experimental design with six treatments and three replications was used. The cover crops (treatments) were: fallow, Panicum maximum, Brachiaria ruziziensis, Brachiaria brizantha, and millet (Pennisetum glaucum). An additional treatment, fallow plus CTS, was included as a control. Soil samples were collected at the depths of 0.00-0.05 m, 0.05-0.10 m, and 0.10-0.20 m after the second rice harvest. The treatments under the NTS led to greater stability in the soil aggregates (ranging from 86.33 to 95.37 %) than fallow plus CTS (ranging from 74.62 to 85.94 %). Fallow plus CTS showed the highest number of aggregates smaller than 2 mm. The cover crops affected soil bulk density differently, and the millet treatment in the NTS had the lowest values. The cover crops without incorporation provided the greatest accumulation of TOC in the soil surface layers. The TOC concentration was positively correlated with the aggregate stability index in all layers and negatively correlated with bulk density in the 0.00-0.10 m layer. MenosSoil aggregation and the distribution of total organic carbon (TOC) may be affected by soil tillage and cover crops. The objective of this study was to determine the effects of crop rotation with cover crops on soil aggregation, TOC concentration in the soil aggregate fractions, and soil bulk density under a no-tillage system (NTS) and conventional tillage system (CTS, one plowing and two disking). This was a three-year study with cover crop/rice/cover crop/rice rotations in the Brazilian Cerrado. A randomized block experimental design with six treatments and three replications was used. The cover crops (treatments) were: fallow, Panicum maximum, Brachiaria ruziziensis, Brachiaria brizantha, and millet (Pennisetum glaucum). An additional treatment, fallow plus CTS, was included as a control. Soil samples were collected at the depths of 0.00-0.05 m, 0.05-0.10 m, and 0.10-0.20 m after the second rice harvest. The treatments under the NTS led to greater stability in the soil aggregates (ranging from 86.33 to 95.37 %) than fallow plus CTS (ranging from 74.62 to 85.94 %). Fallow plus CTS showed the highest number of aggregates smaller than 2 mm. The cover crops affected soil bulk density differently, and the millet treatment in the NTS had the lowest values. The cover crops without incorporation provided the greatest accumulation of TOC in the soil surface layers. The TOC concentration was positively correlated with the aggregate stability index in all layers and negatively corre... Mostrar Tudo |
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Thesagro: |
Brachiaria brizantha; Brachiaria ruziziensis; Manejo do solo; Panicum maximum; Pennisetum glaucum; Plantio direto. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/126808/1/asn.pdf
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Marc: |
LEADER 02307naa a2200229 a 4500
001 2020254
005 2016-03-29
008 2015 bl uuuu u00u1 u #d
024 7 $a10.1590/01000683rbcs20140388$2DOI
100 1 $aNASCENTE, A. S.
245 $aSoil aggregation, organic carbon concentration, and soil bulk density as affected by cover crop species in a no-tillage system.
260 $c2015
520 $aSoil aggregation and the distribution of total organic carbon (TOC) may be affected by soil tillage and cover crops. The objective of this study was to determine the effects of crop rotation with cover crops on soil aggregation, TOC concentration in the soil aggregate fractions, and soil bulk density under a no-tillage system (NTS) and conventional tillage system (CTS, one plowing and two disking). This was a three-year study with cover crop/rice/cover crop/rice rotations in the Brazilian Cerrado. A randomized block experimental design with six treatments and three replications was used. The cover crops (treatments) were: fallow, Panicum maximum, Brachiaria ruziziensis, Brachiaria brizantha, and millet (Pennisetum glaucum). An additional treatment, fallow plus CTS, was included as a control. Soil samples were collected at the depths of 0.00-0.05 m, 0.05-0.10 m, and 0.10-0.20 m after the second rice harvest. The treatments under the NTS led to greater stability in the soil aggregates (ranging from 86.33 to 95.37 %) than fallow plus CTS (ranging from 74.62 to 85.94 %). Fallow plus CTS showed the highest number of aggregates smaller than 2 mm. The cover crops affected soil bulk density differently, and the millet treatment in the NTS had the lowest values. The cover crops without incorporation provided the greatest accumulation of TOC in the soil surface layers. The TOC concentration was positively correlated with the aggregate stability index in all layers and negatively correlated with bulk density in the 0.00-0.10 m layer.
650 $aBrachiaria brizantha
650 $aBrachiaria ruziziensis
650 $aManejo do solo
650 $aPanicum maximum
650 $aPennisetum glaucum
650 $aPlantio direto
700 1 $aLI, Y.
700 1 $aCRUSCIOL, C. A. C.
773 $tRevista Brasileira de Ciência do Solo, Viçosa, MG$gv. 39, n. 3, p. 871-879, maio/jun. 2015.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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| 19. |  | FAZOLIN, M.; ESTRELA, J. L. V.; CATANI, V.; ALÉCIO, M. R.; LIMA, M. S. de. Atividade inseticida do óleo essencial de Tanaecium nocturnum (Barb. Rodr.) Bur. & K. Shum (Bignoneaceae) sobre Sitophilus zeamais Motsch. (Coleoptera: Curculionidae). Acta Amazonica, Manaus, v. 37, n. 4, p. 599-604, 2007.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - B |
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