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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
14/01/2015 |
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Data da última atualização: |
14/01/2015 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
PONTES, L. da S.; BALDISSERA, T. C.; BARRO, R. S.; GIOSTRI, A. F.; STAFIN, G.; SANTOS, B. R. C.; PORFIRIO-DA-SILVA, V.; CARVALHO, P. C. de F. |
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Afiliação: |
IAPAR; IAPAR / UFPR; UFRGS; IAPAR / UFPR; IAPAR; UFPR; VANDERLEY PORFIRIO DA SILVA, CNPF; UFRGS. |
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Título: |
Interactive N supply and cutting intensity effect on canopy height at 95% light interception. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
In: GENERAL MEETING OF THE EUROPEAN GRASSLAND FEDERATION, 25., 2014, Aberystwyth, Wales. EGF at 50: the future of European grasslands: proceedings. Zurich: EGF, 2014. |
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Páginas: |
p. 353-355. |
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Descrição Física: |
Disponível online. |
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Série: |
(Grassland science in Europe, v. 19). |
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DOI: |
20143369054 |
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Idioma: |
Inglês |
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Conteúdo: |
The aim of this study was to evaluate the impact of pasture management practices on leaf canopy height (LCH) at 95% light interception (LI), since this is a valuable strategy of defoliation frequency. These relationships were investigated over two years with monocultures grown in a fully factorial block design crossing six C4 pasture grass species, two cutting intensities and two N levels. We found variations on LCH at 95% LI, mainly across seasons, but also between treatments. The range of these variations was species-dependent. Therefore, in order to maintain a target IL level, grassland managers should cut or graze at different heights according to the species and seasons. N fertilization and an increase in cutting height above ground level can provide a sward structure that allows lower pre-cutting/grazing height and, consequently, shorter intervals between defoliations. |
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Palavras-Chave: |
C4 grasses; Defoliation frequency; Freqüência de desfolhação; Response to management. |
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Thesagro: |
Gramínea; Manejo; Pastagem. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01964nam a2200313 a 4500
001 2005390
005 2015-01-14
008 2014 bl uuuu u00u1 u #d
024 7 $a20143369054$2DOI
100 1 $aPONTES, L. da S.
245 $aInteractive N supply and cutting intensity effect on canopy height at 95% light interception.$h[electronic resource]
260 $aIn: GENERAL MEETING OF THE EUROPEAN GRASSLAND FEDERATION, 25., 2014, Aberystwyth, Wales. EGF at 50: the future of European grasslands: proceedings. Zurich: EGF$c2014
300 $ap. 353-355.$cDisponível online.
490 $a(Grassland science in Europe, v. 19).
520 $aThe aim of this study was to evaluate the impact of pasture management practices on leaf canopy height (LCH) at 95% light interception (LI), since this is a valuable strategy of defoliation frequency. These relationships were investigated over two years with monocultures grown in a fully factorial block design crossing six C4 pasture grass species, two cutting intensities and two N levels. We found variations on LCH at 95% LI, mainly across seasons, but also between treatments. The range of these variations was species-dependent. Therefore, in order to maintain a target IL level, grassland managers should cut or graze at different heights according to the species and seasons. N fertilization and an increase in cutting height above ground level can provide a sward structure that allows lower pre-cutting/grazing height and, consequently, shorter intervals between defoliations.
650 $aGramínea
650 $aManejo
650 $aPastagem
653 $aC4 grasses
653 $aDefoliation frequency
653 $aFreqüência de desfolhação
653 $aResponse to management
700 1 $aBALDISSERA, T. C.
700 1 $aBARRO, R. S.
700 1 $aGIOSTRI, A. F.
700 1 $aSTAFIN, G.
700 1 $aSANTOS, B. R. C.
700 1 $aPORFIRIO-DA-SILVA, V.
700 1 $aCARVALHO, P. C. de F.
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Registro original: |
Embrapa Florestas (CNPF) |
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Biblioteca |
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Registro |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
16/11/2017 |
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Data da última atualização: |
16/11/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
GERHARDT, I. F. S.; AMARAL JÚNIOR, A. T.; GUIMARAES, L. J. M.; SCHWANTES, I. A.; SANTOS, A.; KAMPHORST, S. H.; LIMA, V. J.; POBLETE, F. M.; MYERS, G. O. |
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Afiliação: |
Universidade Estadual do Norte Fluminense Darcy Ribeiro; Universidade Estadual do Norte Fluminense Darcy Ribeiro; LAURO JOSE MOREIRA GUIMARAES, CNPMS; Universidade Estadual do Norte Fluminense Darcy Ribeiro; Universidade Estadual do Norte Fluminense Darcy Ribeiro; Universidade Estadual do Norte Fluminense Darcy Ribeiro; Universidade Estadual do Norte Fluminense Darcy Ribeiro; Universidad de Talca, Chile; Louisiana State University. |
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Título: |
Intraspecific variability of popcorn S7 lines for phosphorus efficiency in the soil. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Genetics and Molecular Research, Ribeirão Preto, v. 16, n. 3, p. 1-13, 2017. |
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DOI: |
10.4238/gmr16039763 |
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Idioma: |
Inglês |
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Conteúdo: |
The expansion of agriculture, coupled with the need for sustainable cropping, is one of the greatest challenges of the scientific community working on the generation of new cultivars adapted to abiotic stress conditions. The aim of this study was to evaluate the variability of popcorn lines as to responsiveness and efficiency in phosphorus use, as a first step towards the implementation of a breeding program interested in the practice of sustainable agriculture. Twenty-five popcorn lines were evaluated in two locations with different phosphorus levels in the soil, using a randomized block design. The following traits were measured: plant height, ear height, female flowering date, male flowering date, male-female flowering interval, ear diameter, ear length, 100-grain weight, grain yield, popping expansion, and expanded popcorn volume per hectare. A combined analysis of variance and test of means were performed, and the lines were classified as to their phosphorus use efficiency, according to their production performance in the different environments. The genetic diversity between the lines was estimated by Tocher?s and UPGMA clustering methods, using generalized Mahalanobis distance. Lines L59, P7, P2, P3, P4, P8, P10, P9, L66, L70, L69, and P5 were efficient and responsive, whereas lines L75, L80, L61, L77, L63, L65, P1, L54, L53, L88, and L71 were inefficient and nonresponsive. Genetic variability was greater in the environments with low phosphorus in the soil, suggesting that the selection pressure exerted in the stressing environment is a decisive factor to obtain a higher expression of variability. MenosThe expansion of agriculture, coupled with the need for sustainable cropping, is one of the greatest challenges of the scientific community working on the generation of new cultivars adapted to abiotic stress conditions. The aim of this study was to evaluate the variability of popcorn lines as to responsiveness and efficiency in phosphorus use, as a first step towards the implementation of a breeding program interested in the practice of sustainable agriculture. Twenty-five popcorn lines were evaluated in two locations with different phosphorus levels in the soil, using a randomized block design. The following traits were measured: plant height, ear height, female flowering date, male flowering date, male-female flowering interval, ear diameter, ear length, 100-grain weight, grain yield, popping expansion, and expanded popcorn volume per hectare. A combined analysis of variance and test of means were performed, and the lines were classified as to their phosphorus use efficiency, according to their production performance in the different environments. The genetic diversity between the lines was estimated by Tocher?s and UPGMA clustering methods, using generalized Mahalanobis distance. Lines L59, P7, P2, P3, P4, P8, P10, P9, L66, L70, L69, and P5 were efficient and responsive, whereas lines L75, L80, L61, L77, L63, L65, P1, L54, L53, L88, and L71 were inefficient and nonresponsive. Genetic variability was greater in the environments with low phosphorus in the soil, suggesting ... Mostrar Tudo |
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Palavras-Chave: |
Divergência genética; Estresse abiótico. |
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Thesagro: |
Agricultura sustentável; Fósforo; Milho pipoca; Variação genética; Zea mays. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/166790/1/Intraspecific-variability.pdf
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Marc: |
LEADER 02570naa a2200313 a 4500
001 2079868
005 2017-11-16
008 2017 bl uuuu u00u1 u #d
024 7 $a10.4238/gmr16039763$2DOI
100 1 $aGERHARDT, I. F. S.
245 $aIntraspecific variability of popcorn S7 lines for phosphorus efficiency in the soil.$h[electronic resource]
260 $c2017
520 $aThe expansion of agriculture, coupled with the need for sustainable cropping, is one of the greatest challenges of the scientific community working on the generation of new cultivars adapted to abiotic stress conditions. The aim of this study was to evaluate the variability of popcorn lines as to responsiveness and efficiency in phosphorus use, as a first step towards the implementation of a breeding program interested in the practice of sustainable agriculture. Twenty-five popcorn lines were evaluated in two locations with different phosphorus levels in the soil, using a randomized block design. The following traits were measured: plant height, ear height, female flowering date, male flowering date, male-female flowering interval, ear diameter, ear length, 100-grain weight, grain yield, popping expansion, and expanded popcorn volume per hectare. A combined analysis of variance and test of means were performed, and the lines were classified as to their phosphorus use efficiency, according to their production performance in the different environments. The genetic diversity between the lines was estimated by Tocher?s and UPGMA clustering methods, using generalized Mahalanobis distance. Lines L59, P7, P2, P3, P4, P8, P10, P9, L66, L70, L69, and P5 were efficient and responsive, whereas lines L75, L80, L61, L77, L63, L65, P1, L54, L53, L88, and L71 were inefficient and nonresponsive. Genetic variability was greater in the environments with low phosphorus in the soil, suggesting that the selection pressure exerted in the stressing environment is a decisive factor to obtain a higher expression of variability.
650 $aAgricultura sustentável
650 $aFósforo
650 $aMilho pipoca
650 $aVariação genética
650 $aZea mays
653 $aDivergência genética
653 $aEstresse abiótico
700 1 $aAMARAL JÚNIOR, A. T.
700 1 $aGUIMARAES, L. J. M.
700 1 $aSCHWANTES, I. A.
700 1 $aSANTOS, A.
700 1 $aKAMPHORST, S. H.
700 1 $aLIMA, V. J.
700 1 $aPOBLETE, F. M.
700 1 $aMYERS, G. O.
773 $tGenetics and Molecular Research, Ribeirão Preto$gv. 16, n. 3, p. 1-13, 2017.
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Embrapa Milho e Sorgo (CNPMS) |
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