Avaliação do desenvolvimento de 73 genótipos de capim-elefante em Campos dos Goytacazes - RJ

Oliveira, André Vicente de; Daher, Rogério Figueiredo; Menezes, Bruna Rafaela da Silva; Gravina, Geraldo de Amaral; Sousa, L. B. de; Gonçalves, Ana Cláudia Da Silva; Oliveira, Maria Lorraine Fonseca

doi:10.17523/bia.v70n2p119

Cited by 8 publications

(13 citation statements)

References 18 publications

(11 reference statements)

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“…Based on that, these genotypes can be indicated in the future for possible crosses aiming to increase the genetic gain for this trait. A similar study has been conducted (Oliveira, 2013) with seventy three of the elephant-grass genotypes described herein, and for the DMY variable the genotypes considered elite, and that corroborated this study were Taiwan A-46, Duro de Volta Grande, Guaco/I.Z.2 and Pasto Panamá; however, ten genotypes that were described as having good productivity were not considered elite genotypes in the current study. Just as in this study, genotype Cameroon has stood out for its productivity, and when compared with two other genotypes of elephant grass it was chosen as having the highest dry matter yield, for energy purposes (Quesada et al, 2004).…”

Section: Variance Analysis and Mean Clustering By The Scott-knott Tessupporting

confidence: 74%

“…However, it should be emphasized that although the CV was very high for the DMY variable, it can be justified by the fact that three distinct variables are related to estimate this character: fresh-matter weight of the plot, ADS (sample dried at 65°C) and ODS (sample dried at 105°C). Other studies conducted with elephant grass have presented CV considered high or very high for DMY Oliveira et al, 2012;Oliveira, 2013). However, %DM has shown a lower CV, ranging from low to medium (Oliveira et al, 2012;Oliveira, 2013), just as in the present study.…”

Section: Variance Analysis and Mean Clustering By The Scott-knott Tessupporting

confidence: 59%

“…Other studies conducted with elephant grass have presented CV considered high or very high for DMY Oliveira et al, 2012;Oliveira, 2013). However, %DM has shown a lower CV, ranging from low to medium (Oliveira et al, 2012;Oliveira, 2013), just as in the present study.…”

Section: Variance Analysis and Mean Clustering By The Scott-knott Tessupporting

confidence: 59%

“…However, in cut 2 the highest %DM, 44.99% was found in genotype Australiano, and the lowest, 29.02%, in King Grass. Corroborating this result, in an evaluation with elephant grass at 51 days of growth, it was found that the %DM had a significant difference in the variance (Oliveira, 2013). Though in some studies no groups were formed by the Scott-Knott test at 5% (Oliveira et al, 2012;Oliveira, 2013), the analysis of the dry matter of each genotype (%DM) is very important, given that 90% of the plant cells may consist of water (Oliveira, 2013).…”

Section: Variance Analysis and Mean Clustering By The Scott-knott Tesmentioning

confidence: 95%

See 3 more Smart Citations

Pre-breeding of elephant grass for energy purposes and biomass analysis in Campos dos Goytacazes- RJ, Brazil

Oliveira¹,

Daher²,

Gravina³

et al. 2014

Afr. J. Agric. Res.

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The objective of this study was to evaluate the morpho-agronomic traits of eighty five accessions of elephant grass (Pennisetum purpureum Schum.) from the germplasm bank located at the Experimental Field of the State Center for Research on Bioenergy and Waste Recovery (Centro Estadual de Pesquisa em Agroenergia e Aproveitamento de Resíduos). The experimental design was a randomized block with two replicates, in an annual-harvest system. The evaluated traits were: percentage of dry matter (%DM), dry matter yield (DMY), number of tillers per linear meter (NT), plant height (HGT), stem diameter (SD), leaf blade width (LW) and leaf blade length (LL). Each cut and variable underwent variance analysis and the Scott-Knott test (P<0.05). Tocher's optimization method, Mahalanobis distance and canonic variables were used for the multi-traits, and importance of the characters in the canonic variables. The following elite genotypes were identified by the Scott-Knott test at 5%: Rico 534-B,

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Section: Variance Analysis and Mean Clustering By The Scott-knott Tessupporting

confidence: 74%

Section: Variance Analysis and Mean Clustering By The Scott-knott Tessupporting

confidence: 59%

Section: Variance Analysis and Mean Clustering By The Scott-knott Tessupporting

confidence: 59%

Section: Variance Analysis and Mean Clustering By The Scott-knott Tesmentioning

confidence: 95%

See 2 more Smart Citations

Pre-breeding of elephant grass for energy purposes and biomass analysis in Campos dos Goytacazes- RJ, Brazil

Oliveira¹,

Daher²,

Gravina³

et al. 2014

Afr. J. Agric. Res.

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“…Enquanto que, tecidos destinados à realização da fotossíntese, por exemplo, devem possuir células com parede delgada e não-lignificada. De acordo com Oliveira et al (2013) a digestibilidade de uma planta forrageira é inversamente proporcional a sua lignificação. Nesse sentido, as gramíneas tropicais C4 tendem a ter uma menor digestibilidade em comparação às gramíneas temperadas C3, em função da maior proporção de tecidos com paredes espessas e lignificadas ( VAN SOEST, 1994).…”

Section: Influencia Dos Metabolismos Fotossintéticos Na Anatomia E DIunclassified

Assimilação de carbono em plantas forrageiras

Simões

Leite

Izidro

et al. 2019

Revista Brasileira De Tecnologia Aplicada Nas Ciências Agrárias

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ResumoO aumento descontrolado da emissão dos gases de efeito estufa, especialmente o dióxido de carbono (CO 2 ), afetará diretamente as plantas, devido à influência do dióxido de carbono nos processos fotossintéticos. No entanto, as consequências ambientais não se restringem apenas a esse incremento de gases na atmosfera. Deve-se considerar o aumento simultâneo da temperatura do ar e uma redução da qualidade e quantidade dos recursos hídricos. O impacto das mudanças climáticas sobre a agricultura refere-se, principalmente, na queda da produtividade e diminuição de áreas adequadas à condução de lavouras. Diante deste problema, é crescente o número de pesquisas registrando que os efeitos do enriquecimento de CO 2 na atmosfera sobre a produtividade dos sistemas agrícolas dependerão da via fotossintética das espécies. Desse modo, o principal interesse deste estudo é auxiliar na compreensão dos mecanismos de fixação do CO 2 e no processo de resposta das plantas forrageiras, aos fatores ambientais que afetam a assimilação de carbono, visto o cenário preocupante das mudanças climáticas e a influência direta destas nas estratégias de manejo das pastagens e no planejamento da oferta de alimento durante o ano.Palavras-chave: metabolismo fotossintético, dióxido de carbono, mudanças climáticas. Carbon assimilation in forage plants AbstractThe uncontrolled increase in the emission of greenhouse gases, especially carbon dioxide (CO 2 ), will directly affect plants, due to the influence of carbon dioxide on photosynthetic processes. However, the environmental consequences are not only limited to this increase of gases in the atmosphere. Consideration should be given to the simultaneous increase in air temperature and a reduction in the quality and quantity of water resources. The impact of climate change on agriculture refers mainly to the fall in productivity and the reduction of areas suitable for the management of crops. Faced with this problem, there is a growing number of studies reporting that the effects of CO 2 enrichment on the productivity of agricultural systems will depend on the photosynthetic pathway of the species. Thus, the main interest of this study is to assist in the understanding of CO 2 fixation mechanisms and the response process of forage plants, the environmental factors that affect carbon assimilation, considering the worrying scenario of climate change and the direct influence of these on the pasture management strategies and food supply planning during the year. Assimilación de carbono en plantas forrajeras ResumenEl aumento descontrolado de la emisión de gases de efecto invernadero, especialmente el dióxido de carbono (CO 2 ), afectará directamente a las plantas, debido a la influencia del dióxido de carbono en los procesos Revisão Bibliográfica SIMÕES, V. J. L. P.; LEITE, M. L. de M. V.; IZIDRO, J. L. P. S.; ARAÚJO JÚNIOR, G.N.; TEIXEIRA, V. I.; Assimilação de carbono em plantas forrageiras.

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Water use efficiency and yield responses of Cenchrus purpureus genotypes under irrigation

Ribeiro,

Mello,

Cunha

et al. 2023

J. Agric. Sci.

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In tropical regions, water stress is one of the main causes of the reduction in forage productivity, and irrigation strategies can mitigate the problem, especially for highly productive species. The objective of this study was to evaluate the effects of irrigation, genotype and plant size on productive responses and water use efficiency (WUE) of elephant grass (Cenchrus purpureus [Schumach.] Morrone), in the rainy and dry season. The experimental design was randomized in blocks, arranged in split plots, the main plots were established based on the use of irrigation and the subplots were the tall-sized genotypes (IRI 381 and Elephant B) and dwarfs (Taiwan A-146 2.37 and Mott). The genotypes were evaluated for two years and harvested every 60 days. Water use efficiency, total forage accumulation per year and harvest, forage accumulation rate and forage density were evaluated. There was a significant difference between the genotypes in terms of total forage accumulated (P < 0.05). The most productive genotype was IRI 381, which showed the greatest total forage accumulation (42 168 kg of DM/ha in two years) in the irrigated plots. During the rainy seasons, IRI 381 stood out in terms of forage accumulated (24 667 kg of DM/ha). Irrigation favoured increases in forage accumulation around 60%, in both years of evaluation. Irrigation and plant size influenced the productivity and WUE of elephant grass harvested in 60-day intervals. Tall genotypes and Taiwan A-146 2.37 (dwarf size) stood out in most of the productive traits analysed, while Mott was highlighted by its forage density.

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Avaliação do desenvolvimento de 73 genótipos de capim-elefante em Campos dos Goytacazes - RJ

Cited by 8 publications

References 18 publications

Pre-breeding of elephant grass for energy purposes and biomass analysis in Campos dos Goytacazes- RJ, Brazil

Pre-breeding of elephant grass for energy purposes and biomass analysis in Campos dos Goytacazes- RJ, Brazil

Assimilação de carbono em plantas forrageiras

Water use efficiency and yield responses of Cenchrus purpureus genotypes under irrigation

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