Adubação nitrogenada, potássica e fosfatada na produção e germinação de sementes de capim quicuio-da-Amazônia

Deminicis, Bruno Borges; Vieira, Henrique Duarte; Silva, Roberto Ferreira da; Abreu, João Batista Rodrigues de; Araújo, Saulo Alberto do Carmo; Jardim, Júlia Gazzoni

doi:10.1590/s0101-31222010000200007

Cited by 4 publications

(8 citation statements)

References 11 publications

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“…This occurs because, during the germination process, proteins are hydrolyzed to supply N and C to the embryonic axis, which promotes adequate initial development of the seedlings (Buckeridge et al, 2004). Similar responses regarding the effect of N on seed germination were also observed by Deminicis et al (2010), who reported that N application (200 kg N ha −1 ) during the initial stage of development (on the day of the staging of the herbage) positively influenced the germination of creeping signalgrass seeds.…”

Section: Physiological Seed Qualitysupporting

confidence: 80%

“…topdressed during the vegetative phase plus 100 kg N ha −1 topdressed at panicle initiation). The N rate (150 kg N ha −1 ) applied to Llanero creeping signalgrass was determined by scientific research (Deminicis et al, 2010;Catuchi et al, 2013). These authors found that doses between 127 and 200 kg N ha −1 provided the highest yields of pure seeds of creeping signalgrass.…”

Section: Experimental Sitementioning

confidence: 99%

“…Moreover, N is one of the nutrients that accumulates in high amounts in the herbage of tropical perennial forage grasses (Vellinga et al, 2009) due to the intense vegetative growth of the plants prior to the flowering stage (Pires, 2006). Some studies conducted in different soils and under different climate conditions have evaluated the effect of N rates on tropical grass seed production (Barth Neto et al, 2010;Canto et al, 2012Canto et al, , 2016Benteo et al, 2016), including creeping signalgrass (Deminicis et al, 2010;Peres et al, 2010;Catuchi et al, 2013). Deminicis et al (2010) measured the highest yield of pure seeds at N rates between 171 and 200 kg N ha −1 , depending on the experiment.…”

mentioning

confidence: 99%

“…Some studies conducted in different soils and under different climate conditions have evaluated the effect of N rates on tropical grass seed production (Barth Neto et al, 2010;Canto et al, 2012Canto et al, , 2016Benteo et al, 2016), including creeping signalgrass (Deminicis et al, 2010;Peres et al, 2010;Catuchi et al, 2013). Deminicis et al (2010) measured the highest yield of pure seeds at N rates between 171 and 200 kg N ha −1 , depending on the experiment. Catuchi et al (2013) obtained the highest yield of pure seeds of 'Llanero' creeping signalgrass with application rates between 127 and 154 kg N ha −1 .…”

mentioning

confidence: 99%

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Nitrogen Management, Nitrogen Use Efficiency, and Seed Yield and Quality of Creeping Signalgrass

et al. 2017

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Nitrogen (N) fertilization management can affect the seed yield and quality of tropical forage grasses. Studies have shown the effect of N rates on tropical grass seed production, but no study has evaluated the effect of application timing of N on the N use efficiency (NUE) and seed yield and quality of creeping signalgrass [Urochloa humidicola (Rendle) Morrone & Zuloaga, syn. Brachiaria humidicola (Rendle) Schweick.]. Field experiments were conducted over two growing seasons in Santo Anastácio, São Paulo, Brazil, to evaluate the influence of N fertilization timing on plant nutrition, herbage mass, N uptake, NUE, and seed yield and quality of creeping signalgrass ‘Llanero’. The treatments included a control (no N application) and four treatments with N applied at different times (150 kg N ha−1 during the vegetative phase, 150 kg N ha−1 at panicle initiation [prebooting], 100 kg N ha−1 during the vegetative phase plus 50 kg N ha−1 at panicle initiation, and 50 kg N ha−1 during the vegetative phase plus 100 kg N ha−1 at panicle initiation). Topdressed N fertilization increased the concentration of N in the flag leaf by 35.9% (from 12.2 to 16.6 g kg−1) and increased the herbage N uptake by 99.7% (from 72 and 144 kg ha−1). Herbage mass was not affected by topdressed N fertilization. The greatest seed yield (64.2% or 136 kg ha−1 greater than the control, and an average of 22.5% or 64 kg ha−1 greater than the other N treatments) was observed in response to 100 kg N ha−1 applied during the vegetative phase plus 50 kg N ha−1 applied at panicle initiation, which resulted in improved NUE. Seed viability was greater in the treatments where all or most of the N was applied at panicle initiation. In addition, the seed germination percentage was positively affected by N fertilization, regardless of the N application timing.

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Section: Physiological Seed Qualitysupporting

confidence: 80%

Section: Experimental Sitementioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Nitrogen Management, Nitrogen Use Efficiency, and Seed Yield and Quality of Creeping Signalgrass

et al. 2017

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“…The country has increased its planted pasture area in approximately 341% from 1970 to 2006. Currently, it is mentioned as the largest supplier of seeds for cultivation and regeneration of pasture of the domestic market and largest exporter of tropical forage plants worldwide (Deminicis et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Sanitary analysis, transmission and pathogenicity of fungi associated with forage plant seeds in tropical regions of Brazil

et al. 2014

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-Brazil is a major producer and exporter of beef in the world, 90% of the production is made in pasture and 85% of cultivated pastures in the country are Brachiaria sp. With a growing livestock industry in the recent years, several forage plant diseases became significant importance for causing losses in pasture productivity and quality. This study aims at quantifying the species of fungi associated with seeds and their frequency in forage plants from tropical regions of Brazil. Assays were performed considering: incidence, pathogenicity and seed-seedling transmission of fungi associated with seeds. Therefore, 28 lots of forage species seeds produced in the harvest of 2010-2011 were used. Fourteen genera of fungi associated with seeds were found, among which Bipolaris sp., Phoma sp., and Curvularia sp. had pathogenic potential. It was possible to note that Bipolaris sp., is prejudicial to forage seedlings of Brachiaria, Panicum and Crotalaria. Bipolaris sp. and Curvularia sp. have an average of seed-seedling transmission of 100% and 90%, respectively.

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OSMOCONDITIONING OF Urochloa brizantha SEEDS TO REDUCE PELLETING NEGATIVE EFFECTS

Bonome

Guimarães

Oliveira

et al. 2017

BJA

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Objetivou-se neste trabalho verificar a influência de materiais de peletização na qualidade fisiológica de sementes de Urochloa brizantha e avaliar o efeito do condicionamento osmótico no envigoramento das sementes, visando reduzir possíveis efeitos negativos da peletização. O ensaio foi conduzido utilizando sementes com três níveis de qualidade fisiológica (alta, média e baixa porcentagem de germinação), submetidas ou não ao condicionamento osmótico com KNO3, a -1,1 MPa, por 12 horas. Após lavagem e secagem, as sementes foram peletizadas com dois tipos de materiais, um composto de areia e microcelulose e outro constituído de areia, microcelulose e Explosol®. A peletização de sementes de U. brizantha afeta negativamente a porcentagem de germinação, o índice de velocidade de protrusão radicular, a emergência e a velocidade de emergência de plântulas. O condicionamento fisiológico é eficiente em minimizar os efeitos negativos da peletização, principalmente em sementes de média qualidade fisiológica.

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Adubação nitrogenada, potássica e fosfatada na produção e germinação de sementes de capim quicuio-da-Amazônia

Cited by 4 publications

References 11 publications

Nitrogen Management, Nitrogen Use Efficiency, and Seed Yield and Quality of Creeping Signalgrass

Nitrogen Management, Nitrogen Use Efficiency, and Seed Yield and Quality of Creeping Signalgrass

Sanitary analysis, transmission and pathogenicity of fungi associated with forage plant seeds in tropical regions of Brazil

OSMOCONDITIONING OF Urochloa brizantha SEEDS TO REDUCE PELLETING NEGATIVE EFFECTS

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