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Biblioteca(s): |
Embrapa Gado de Leite; Embrapa Pecuária Sudeste. |
Data corrente: |
16/02/2017 |
Data da última atualização: |
30/01/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
GIMENES, F. M. de A.; BERNDT, A.; MATEUS, G. P.; LEDO, F. J. da S.; DEMARCHI, J. J. A. de A.; GIACOMINI, A. A.; GERDES, L.; BATISTA, K. |
Afiliação: |
Flávia Maria de Andrade Gimenes, IZ - SP; ALEXANDRE BERNDT, CPPSE; Gustavo Pavan Mateus, APTA; FRANCISCO JOSE DA SILVA LEDO, CNPGL; João José Assumpção de Abreu Demarchi, IZ - SP; Alessandra Aparecida Giacomini, IZ - SP; Luciana Gerdes, IZ- SP; Karina Batista, IZ - SP. |
Título: |
Forage mass and agronomic traits of Elephant grass genotypes under free-growth and conventional cutting systems. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Semina: Ciências Agrárias, v. 37, n. 4, supl. 1, p. 2577-2588, 2016. |
Idioma: |
Inglês |
Conteúdo: |
Abstract Few grass genotypes with high yield potential are used as fodder in Brazil, making it necessary to develop new cultivars. In this study, we compared tiller density, forage mass, and agronomic traits across 12 Elephant grass (Pennisetum purpureum Schum.) genotypes under free-growth and conventional cutting systems at the Agência Paulista de Técnologia dos Agronegócios (APTA), Andradina, São Paulo, Brazil. The experimental design of the two trials was three replicates of a randomized complete block, each experimental unit consisting of 37.5-m2 plots with five rows spaced 1.5 m apart. We estimated tiller density 30, 60, and 150 days after planting (DAP), and 90 days after cut (DAC), and harvested the grass 150 DAP and 90 DAC for determination of forage mass and agronomic traits. In the free-growth system, forage mass was highest in genotypes CNPGL 00-155-2, CNPGL 92-41-1, CNPGL 92-51-1, and CNPGL 96-21-1 and in cultivar Guaçu. After cutting and regrowth, forage mass was highest in genotypes CNPGL 93-41-1, CNPGL 92-41-1, and CNPGL 91-11-2 and in cultivars Mineiro IPEACO, Guaçu, and Pioneiro. Stem mass was higher than leaf mass in the two trials, with leaf/stem ratio in most genotypes below 1.0. Aerial tiller density was highest for genotypes Pioneiro and CNPGL 00-155-2, and stem diameter was smallest in cv. Pioneiro in the free-growth and in the cutting and regrowth systems (9.7 and 7.62 mm, respectively). After regrowth, plant height ranged from 0.56 m in cv. Guaçu to 2.0 m in cv. Mineiro IPEACO and the mean number of internodes.stem-1 ranged from 2.1 in cv. Guaçu to 7.4 in cv. Pioneiro. Forage mass correlated positively with basal tiller density (r =0.4096) and negatively with stem diameter (r =-0.4879) in the free-growth trial, but relationships were not significant after regrowth. MenosAbstract Few grass genotypes with high yield potential are used as fodder in Brazil, making it necessary to develop new cultivars. In this study, we compared tiller density, forage mass, and agronomic traits across 12 Elephant grass (Pennisetum purpureum Schum.) genotypes under free-growth and conventional cutting systems at the Agência Paulista de Técnologia dos Agronegócios (APTA), Andradina, São Paulo, Brazil. The experimental design of the two trials was three replicates of a randomized complete block, each experimental unit consisting of 37.5-m2 plots with five rows spaced 1.5 m apart. We estimated tiller density 30, 60, and 150 days after planting (DAP), and 90 days after cut (DAC), and harvested the grass 150 DAP and 90 DAC for determination of forage mass and agronomic traits. In the free-growth system, forage mass was highest in genotypes CNPGL 00-155-2, CNPGL 92-41-1, CNPGL 92-51-1, and CNPGL 96-21-1 and in cultivar Guaçu. After cutting and regrowth, forage mass was highest in genotypes CNPGL 93-41-1, CNPGL 92-41-1, and CNPGL 91-11-2 and in cultivars Mineiro IPEACO, Guaçu, and Pioneiro. Stem mass was higher than leaf mass in the two trials, with leaf/stem ratio in most genotypes below 1.0. Aerial tiller density was highest for genotypes Pioneiro and CNPGL 00-155-2, and stem diameter was smallest in cv. Pioneiro in the free-growth and in the cutting and regrowth systems (9.7 and 7.62 mm, respectively). After regrowth, plant height ranged from 0.56 m in cv. Guaçu to ... Mostrar Tudo |
Palavras-Chave: |
ILPF; Leaf/stem ratio; Tiller density. |
Thesagro: |
Pennisetum Purpureum. |
Thesaurus Nal: |
clones; height; hybrids. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/155894/1/Cnpgl-2016-Semina-Forage.pdf
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Marc: |
LEADER 02675naa a2200289 a 4500 001 2064494 005 2023-01-30 008 2016 bl uuuu u00u1 u #d 100 1 $aGIMENES, F. M. de A. 245 $aForage mass and agronomic traits of Elephant grass genotypes under free-growth and conventional cutting systems.$h[electronic resource] 260 $c2016 520 $aAbstract Few grass genotypes with high yield potential are used as fodder in Brazil, making it necessary to develop new cultivars. In this study, we compared tiller density, forage mass, and agronomic traits across 12 Elephant grass (Pennisetum purpureum Schum.) genotypes under free-growth and conventional cutting systems at the Agência Paulista de Técnologia dos Agronegócios (APTA), Andradina, São Paulo, Brazil. The experimental design of the two trials was three replicates of a randomized complete block, each experimental unit consisting of 37.5-m2 plots with five rows spaced 1.5 m apart. We estimated tiller density 30, 60, and 150 days after planting (DAP), and 90 days after cut (DAC), and harvested the grass 150 DAP and 90 DAC for determination of forage mass and agronomic traits. In the free-growth system, forage mass was highest in genotypes CNPGL 00-155-2, CNPGL 92-41-1, CNPGL 92-51-1, and CNPGL 96-21-1 and in cultivar Guaçu. After cutting and regrowth, forage mass was highest in genotypes CNPGL 93-41-1, CNPGL 92-41-1, and CNPGL 91-11-2 and in cultivars Mineiro IPEACO, Guaçu, and Pioneiro. Stem mass was higher than leaf mass in the two trials, with leaf/stem ratio in most genotypes below 1.0. Aerial tiller density was highest for genotypes Pioneiro and CNPGL 00-155-2, and stem diameter was smallest in cv. Pioneiro in the free-growth and in the cutting and regrowth systems (9.7 and 7.62 mm, respectively). After regrowth, plant height ranged from 0.56 m in cv. Guaçu to 2.0 m in cv. Mineiro IPEACO and the mean number of internodes.stem-1 ranged from 2.1 in cv. Guaçu to 7.4 in cv. Pioneiro. Forage mass correlated positively with basal tiller density (r =0.4096) and negatively with stem diameter (r =-0.4879) in the free-growth trial, but relationships were not significant after regrowth. 650 $aclones 650 $aheight 650 $ahybrids 650 $aPennisetum Purpureum 653 $aILPF 653 $aLeaf/stem ratio 653 $aTiller density 700 1 $aBERNDT, A. 700 1 $aMATEUS, G. P. 700 1 $aLEDO, F. J. da S. 700 1 $aDEMARCHI, J. J. A. de A. 700 1 $aGIACOMINI, A. A. 700 1 $aGERDES, L. 700 1 $aBATISTA, K. 773 $tSemina: Ciências Agrárias$gv. 37, n. 4, supl. 1, p. 2577-2588, 2016.
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Embrapa Gado de Leite (CNPGL) |
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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
13/01/1999 |
Data da última atualização: |
13/01/1999 |
Autoria: |
WESTERHOF, R.; VILELA, L.; AYARZA, M.; ZECH, W. |
Título: |
Land use effects on labile N extracted with permanganate and the nitrogen management index in the cerrado region of Brazil. |
Ano de publicação: |
1998 |
Fonte/Imprenta: |
Biology and Fertility of Soils, Berlin, v.27, p.353-357, 1998. |
Idioma: |
Inglês |
Conteúdo: |
The effect of and use on the availability of nitrogen (N) was studied by separating total N into a labile and a stable fraction by oxidation and extraction of labile N with KMnO4. The nitrogen management index (NMI) was calculated following the method of Blair et al. (1995) for the carbon management index. In all systems, labile N released by KMnO4 was a better indicator of N availability than total and stable N. The NMI was a good indicator of N availability but gave no information about the total amount of N. In land use system analysis, total N and labile N can used together as a simple and rapid way to evaluate the N status of the soil. Legume-based pastures specifically increased the amount of labile N. Although soybeans had a dominant role in the continuos cropping system studied, the total N contents of these systems were lower than those of the natural Cerrado. The availability of N under legume-based pastures and legume-based pasture-crop rotations was higher than under the natural Cerrado and the continuous cropping systems. |
Thesagro: |
Cerrado; Mineralização; Nitrogênio; Uso da Terra. |
Thesaurus NAL: |
land use; mineralization; nitrogen. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01732naa a2200241 a 4500 001 1544522 005 1999-01-13 008 1998 bl --- 0-- u #d 100 1 $aWESTERHOF, R. 245 $aLand use effects on labile N extracted with permanganate and the nitrogen management index in the cerrado region of Brazil. 260 $c1998 520 $aThe effect of and use on the availability of nitrogen (N) was studied by separating total N into a labile and a stable fraction by oxidation and extraction of labile N with KMnO4. The nitrogen management index (NMI) was calculated following the method of Blair et al. (1995) for the carbon management index. In all systems, labile N released by KMnO4 was a better indicator of N availability than total and stable N. The NMI was a good indicator of N availability but gave no information about the total amount of N. In land use system analysis, total N and labile N can used together as a simple and rapid way to evaluate the N status of the soil. Legume-based pastures specifically increased the amount of labile N. Although soybeans had a dominant role in the continuos cropping system studied, the total N contents of these systems were lower than those of the natural Cerrado. The availability of N under legume-based pastures and legume-based pasture-crop rotations was higher than under the natural Cerrado and the continuous cropping systems. 650 $aland use 650 $amineralization 650 $anitrogen 650 $aCerrado 650 $aMineralização 650 $aNitrogênio 650 $aUso da Terra 700 1 $aVILELA, L. 700 1 $aAYARZA, M. 700 1 $aZECH, W. 773 $tBiology and Fertility of Soils, Berlin$gv.27, p.353-357, 1998.
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