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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
13/10/2016 |
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Data da última atualização: |
13/12/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SOUZA, G. P. de; FIGUEIREDO, C. C. de; SOUSA, D. M. G. de. |
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Afiliação: |
GÉSSICA PEREIRA DE SOUZA, UNB; CÍCERO CÉLIO DE FIGUEIREDO, UNB; DJALMA MARTINHAO GOMES DE SOUSA, CPAC. |
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Título: |
Relationships between labile soil organic carbon fractions under different soil management systems. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Scientia Agricola, Piracicaba, v. 73, n. 6, p. 535-542, Nov./Dec. 2016. |
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ISSN: |
0103-9016 |
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DOI: |
http://dx.doi.org/10.1590/0103-9016-2015-0047 |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT: The study of labile carbon fractions (LCF) provides an understanding of the behavior of soil organic matter (SOM) under different soil management systems and cover crops. The aim of this study was to assess the effect of different soil management systems with respect to tillage, cover crop and phosphate fertilization on the amount of the LCF of SOM. Treatments consisted of conventional tillage (CT) and no-tillage (NT) with millet as the cover crop and a no-tillage system with velvet bean at two phosphorus dosages. Soil samples were collected and analyzed for organic carbon (OC), C oxidizable by KMnO4 (C-KMnO4), particulate OC (POC), microbial biomass carbon and light SOM in the 0.0-0.05, 0.05-0.10 and 0.10-0.20 m soil layers. The Carbon Management Index (CMI) was calculated to evaluate the impacts of soil management treatments on the quality of the SOM. The different LCFs are sensitive to different soil management systems, and there are significant correlations between them. C-KMnO4 is considered the best indicator of OC carbon lability. In the soil surface layers, the CT reduced the carbon content in all of the labile fractions of the SOM. The use of phosphorus led to the accumulation of OC and carbon in the different soil fractions regardless of the tillage system or cover crop. The application of phosphate fertilizer improved the ability of the NTsystem to promote soil quality, as assessed by the CMI. |
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Palavras-Chave: |
Labile organic matter; Matéria orgânica instável; Phosphorus fertilization. |
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Thesagro: |
Fertilidade do solo; Fósforo; Materia orgânica; Solo. |
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Thesaurus Nal: |
soil organic matter. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/1054545/1/scientiaagricolav73n6p535.pdf
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Marc: |
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Registro original: |
Embrapa Cerrados (CPAC) |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
16/03/2020 |
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Data da última atualização: |
29/09/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
LEAO, P. C. de S.; CHAVES, A. R. de M. |
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Afiliação: |
PATRICIA COELHO DE SOUZA LEAO, CPATSA; AGNALDO RODRIGUES DE MELO CHAVES, CPATSA. |
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Título: |
Agronomic responses of grapevine Chenin Blanc as a function of training systems and rootstocks. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Scientia Agricola, v. 78, n.1, e20180413, 2021. |
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DOI: |
10.1590/1678-992X-2018-0413 |
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Idioma: |
Inglês |
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Conteúdo: |
The aim of this research was to study the influence of training system and rootstock on the yield, vigor and physiology of the ?Chenin Blanc? grapevine at São Francisco Valley, northeastern Brazil. An experiment was carried out on eight harvests, from 2013 to 2017, in Petrolina, in the state of Pernambuco. Grapevines were grown under two training systems, lyre and espalier, and five rootstocks: ?IAC 572?, ?IAC 313?, ?IAC 766?, ?Paulsen 1103? and ?SO4?, using a split-plot randomized block design, with training systems assigned to the main plot and the rootstock assigned to the subplot. Lyre favored an increase in the number of bunches, branches and leaf mass in the harvest of the first semester of the year, while in the second semester there were increases of 40 % in the number of bunches and 10 % in leaf mass. Lyre promoted more balanced vines, showing a better ratio between production and pruning weight (Ravaz index). The rootstocks ?IAC 766?, ?IAC 313? and ?IAC 572? increased yield and bunch mass under both training systems, while ?SO4? reduced yield and vigor. The stomatal conductance and instantaneous efficiency of water use were not influenced by either the training system or the rootstock. Under tropical conditions in the São Francisco Valley, ?Chenin Blanc? grapevine may be grown under the lyre training system, preferably on the ?IAC 766? rootstock, to obtain high yields and balanced grapevines. |
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Palavras-Chave: |
Chenin Blanc; Viticultura tropical. |
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Thesagro: |
Fisiologia Vegetal; Porta Enxerto; Uva; Vitis Vinifera. |
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Thesaurus NAL: |
Grapes; Vitis. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/1121262/1/AgronomicresponsesofgrapevineCheninBlancasafunctionoftrainingsystems2020.pdf
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Marc: |
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Embrapa Semiárido (CPATSA) |
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