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Registro Completo |
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Biblioteca(s): |
Embrapa Trigo; Embrapa Unidades Centrais. |
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Data corrente: |
04/08/2016 |
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Data da última atualização: |
04/08/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
COELHO, M. A. de O.; TORRES, G. A. M.; CECON, P. R.; SANTANA, F. M. |
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Afiliação: |
MAURÍCIO ANTÔNIO DE OLIVEIRA COELHO, EPAMIG; GISELE ABIGAIL MONTAN TORRES, CNPT; PAULO ROBERTO CECON, UFV; FLAVIO MARTINS SANTANA, CNPT. |
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Título: |
Sowing date reduces the incidence of wheat blast disease. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 51, n. 5, p. 631-637, maio 2016. |
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ISSN: |
1678-3921 |
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DOI: |
10.1590/S0100-204X2016000500025 |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this work was to assess the effect of sowing date on the intensity of wheat blast disease, as well as the yield losses caused by this disease in different wheat (Triticum aestivum) genotypes. The experiments were conducted in 2013 at the Sertãozinho experimental station of Empresa de Pesquisa Agropecuária de Minas Gerais (Epamig), in the municipality of Patos de Minas, in the state of Minas Gerais, Brazil. Fourteen wheat genotypes and two sowing dates were evaluated. The experimental design was a randomized complete block with three replicates. The evaluated variables were: incidence, severity, thousand grain weight (TGW), grain yield, and yield losses. A disease index (DI) was calculated, based both on the incidence and the severity of the disease, to measure blast intensity in wheat. The sowing date significantly affected DI, TGW, and grain yield. Significant linear correlations were observed between DI and yield losses (0.89), between losses and TGW (?0.85), and between losses and grain yield (?0.93). For wheat blast, DIs greater than or equal to 0.5 indicate potential yield losses equal to or greater than 70%. The EP063030 line and the MGS Brilhante and BRS 264 cultivars are the most tolerant to blast, when exposed to high disease pressure. |
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Palavras-Chave: |
Disease; Índice da doença; Severidade; Tolerância. |
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Thesagro: |
Brusone; Doença; Pyricularia Oryzae; Trigo; Triticum Aestivum. |
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Thesaurus Nal: |
Magnaporthe oryzae; Stress tolerance; wheat. |
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Categoria do assunto: |
--
H Saúde e Patologia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/146071/1/ID43727-2016PABv51n5p631.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/146135/1/Sowing-date-reduces.pdf
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Marc: |
LEADER 02170naa a2200325 a 4500
001 2050199
005 2016-08-04
008 2016 bl uuuu u00u1 u #d
022 $a1678-3921
024 7 $a10.1590/S0100-204X2016000500025$2DOI
100 1 $aCOELHO, M. A. de O.
245 $aSowing date reduces the incidence of wheat blast disease.
260 $c2016
520 $aThe objective of this work was to assess the effect of sowing date on the intensity of wheat blast disease, as well as the yield losses caused by this disease in different wheat (Triticum aestivum) genotypes. The experiments were conducted in 2013 at the Sertãozinho experimental station of Empresa de Pesquisa Agropecuária de Minas Gerais (Epamig), in the municipality of Patos de Minas, in the state of Minas Gerais, Brazil. Fourteen wheat genotypes and two sowing dates were evaluated. The experimental design was a randomized complete block with three replicates. The evaluated variables were: incidence, severity, thousand grain weight (TGW), grain yield, and yield losses. A disease index (DI) was calculated, based both on the incidence and the severity of the disease, to measure blast intensity in wheat. The sowing date significantly affected DI, TGW, and grain yield. Significant linear correlations were observed between DI and yield losses (0.89), between losses and TGW (?0.85), and between losses and grain yield (?0.93). For wheat blast, DIs greater than or equal to 0.5 indicate potential yield losses equal to or greater than 70%. The EP063030 line and the MGS Brilhante and BRS 264 cultivars are the most tolerant to blast, when exposed to high disease pressure.
650 $aMagnaporthe oryzae
650 $aStress tolerance
650 $awheat
650 $aBrusone
650 $aDoença
650 $aPyricularia Oryzae
650 $aTrigo
650 $aTriticum Aestivum
653 $aDisease
653 $aÍndice da doença
653 $aSeveridade
653 $aTolerância
700 1 $aTORRES, G. A. M.
700 1 $aCECON, P. R.
700 1 $aSANTANA, F. M.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 51, n. 5, p. 631-637, maio 2016.
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Registro original: |
Embrapa Trigo (CNPT) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
25/04/2019 |
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Data da última atualização: |
07/11/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
IVANOV, M. M. M.; LACERDA, C. F. de; FERNANDES, F. E. P.; CAVALCANTE, A. C. R.; OLIVEIRA, T. S. de. |
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Afiliação: |
MARLETE MOREIRA MENDES IVANOV, Universidade Federal do Piaui (UFPI) - Bom Jesus, PI, Brazil; CLAUDIVAN FEITOSA DE LACERDA, Universidade Federal do Ceará (UFC) - Fortaleza, CE, Brazil; FRANCISCO EDEN PAIVA FERNANDES, CNPC; ANA CLARA RODRIGUES CAVALCANTE, CNPC; TEÓGENES SENNA DE OLIVEIRA, Universidade Federal de Viçosa (UFV) - Viçosa, MG, Brazil. |
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Título: |
Environmental parameters and tree physiology in two semiarid land use systems in Brazil. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Journal of Forestry Research, v. 30, n. 2, p. 397-407, Apr. 2019. |
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DOI: |
https://doi.org/10.1007/s11676-018-0665-y |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: To determine if reduced tree densities (number of trees per unit area) lead to changes in micro-meteorological and tree physiological characteristics, two areas with different tree densities were assessed. One was an agrosilvopastoral system (AGP) with low tree density, and the other, a secondary forest (SF) with greater tree numbers, both located in a semiarid region of Brazil. Data were collected simultaneously by two automated weather stations: rainfall, air (Ta) and soil temperatures (Ts5cm), relative humidity (RHair), photosynthetically active radiation (PAR), soil moisture at two depths (Ms30cm and Ms50cm), and wind velocity (Vw). Net photosynthesis in Cordia oncocalyx Allemão trees was measured with an infrared gas analyzer in February, March, May, July, August and September 2011, which encompasses a rainy period followed by a dry period. Average values of Ta, Ts5cm, Vw and PAR were greater and average values of RHair and Ms50cm were lesser in the AGP. Photosynthetic rates were greater in plants growing under the AGP at the onset of the dry season when Vw, PAR and Ts5cm were greater and Ms50cm was lesser. Photosynthetic rates correlated strongly with physical parameters during the dry season, especially under SF. Differences in tree numbers between AGP and SF led to differences in physical environmental parameters; however, the latter had less influence on photosynthetic rates in C. oncocalyx during the rainy season. During the dry season, all physical parameters had an impact on net photosynthesis under SF but not under AGP. This indicates a certain independence of plants in AGP. MenosAbstract: To determine if reduced tree densities (number of trees per unit area) lead to changes in micro-meteorological and tree physiological characteristics, two areas with different tree densities were assessed. One was an agrosilvopastoral system (AGP) with low tree density, and the other, a secondary forest (SF) with greater tree numbers, both located in a semiarid region of Brazil. Data were collected simultaneously by two automated weather stations: rainfall, air (Ta) and soil temperatures (Ts5cm), relative humidity (RHair), photosynthetically active radiation (PAR), soil moisture at two depths (Ms30cm and Ms50cm), and wind velocity (Vw). Net photosynthesis in Cordia oncocalyx Allemão trees was measured with an infrared gas analyzer in February, March, May, July, August and September 2011, which encompasses a rainy period followed by a dry period. Average values of Ta, Ts5cm, Vw and PAR were greater and average values of RHair and Ms50cm were lesser in the AGP. Photosynthetic rates were greater in plants growing under the AGP at the onset of the dry season when Vw, PAR and Ts5cm were greater and Ms50cm was lesser. Photosynthetic rates correlated strongly with physical parameters during the dry season, especially under SF. Differences in tree numbers between AGP and SF led to differences in physical environmental parameters; however, the latter had less influence on photosynthetic rates in C. oncocalyx during the rainy season. During the dry season, all physical param... Mostrar Tudo |
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Palavras-Chave: |
Agroforestry systems; Agrosilvopastoral system; Cordia oncocalyx; Net photosynthesis; Pau Branco; Sistema agrosilvopastoril. |
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Thesaurus NAL: |
Brazil; Environmental factors; Secondary forests; Semiarid soils. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02574naa a2200301 a 4500
001 2108479
005 2019-11-07
008 2019 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s11676-018-0665-y$2DOI
100 1 $aIVANOV, M. M. M.
245 $aEnvironmental parameters and tree physiology in two semiarid land use systems in Brazil.$h[electronic resource]
260 $c2019
520 $aAbstract: To determine if reduced tree densities (number of trees per unit area) lead to changes in micro-meteorological and tree physiological characteristics, two areas with different tree densities were assessed. One was an agrosilvopastoral system (AGP) with low tree density, and the other, a secondary forest (SF) with greater tree numbers, both located in a semiarid region of Brazil. Data were collected simultaneously by two automated weather stations: rainfall, air (Ta) and soil temperatures (Ts5cm), relative humidity (RHair), photosynthetically active radiation (PAR), soil moisture at two depths (Ms30cm and Ms50cm), and wind velocity (Vw). Net photosynthesis in Cordia oncocalyx Allemão trees was measured with an infrared gas analyzer in February, March, May, July, August and September 2011, which encompasses a rainy period followed by a dry period. Average values of Ta, Ts5cm, Vw and PAR were greater and average values of RHair and Ms50cm were lesser in the AGP. Photosynthetic rates were greater in plants growing under the AGP at the onset of the dry season when Vw, PAR and Ts5cm were greater and Ms50cm was lesser. Photosynthetic rates correlated strongly with physical parameters during the dry season, especially under SF. Differences in tree numbers between AGP and SF led to differences in physical environmental parameters; however, the latter had less influence on photosynthetic rates in C. oncocalyx during the rainy season. During the dry season, all physical parameters had an impact on net photosynthesis under SF but not under AGP. This indicates a certain independence of plants in AGP.
650 $aBrazil
650 $aEnvironmental factors
650 $aSecondary forests
650 $aSemiarid soils
653 $aAgroforestry systems
653 $aAgrosilvopastoral system
653 $aCordia oncocalyx
653 $aNet photosynthesis
653 $aPau Branco
653 $aSistema agrosilvopastoril
700 1 $aLACERDA, C. F. de
700 1 $aFERNANDES, F. E. P.
700 1 $aCAVALCANTE, A. C. R.
700 1 $aOLIVEIRA, T. S. de
773 $tJournal of Forestry Research$gv. 30, n. 2, p. 397-407, Apr. 2019.
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