Silicate and phosphate combinations for marandu palisadegrass growing on an oxisol

Melo, Suzana Pereira de; Monteiro, Francisco Antônio; Manfredini, Daniel

doi:10.1590/s0103-90162007000300010

Cited by 8 publications

(10 citation statements)

References 9 publications

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“…Esse resultado é semelhante ao obtido por Ferreira et al (2008), que ao trabalharem com doses crescentes de P em capim mombaça, observaram resposta quadrática para a produção de MS de folhas com idade de rebrota de 35 dias. Melo et al (2007), estudando doses crescentes de P combinadas com silício também observaram aumento na produção de MS de folhas com o aumento das doses de P. O aumento da produção de folhas era esperado, pois o fósforo é um elemento essencial ao crescimento e reprodução das plantas, as quais não alcançam seu máximo potencial produtivo sem um adequado suprimento nutricional (Marschner, 1995). O fósforo é componente de compostos importantes das células vegetais, incluindo fosfato presente nas moléculas de açúcares, intermediários da respiração e fotossíntese, bem como dos fosfolipídeos que compõem as membranas vegetais (Taiz e Zeiger, 2004).…”

Section: Figura 3 Produção De Ms De Folhas Do Capim Mombaça Sob Doseunclassified

Efeito da adubação com fósforo do capim Mombaça em solos com texturas arenosa e argilosa

et al. 2012

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Section: Figura 3 Produção De Ms De Folhas Do Capim Mombaça Sob Doseunclassified

Efeito da adubação com fósforo do capim Mombaça em solos com texturas arenosa e argilosa

et al. 2012

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“…It is known that phosphorus (P) availability in soil leads to higher pasture dry matter accumulation (Gheri et al, 2000;Mesquita et al, 2004;Melo et al, 2007), due to the positive influence on tillering (Cecato et al, 2000), thereby increasing the amount of fodder available. Phosphorous fertilization also increases plant tissue P content and consequently, the quality of forage (Schunke et al, 1991).…”

Section: Introductionmentioning

confidence: 99%

“…Phosphorous fertilization also increases plant tissue P content and consequently, the quality of forage (Schunke et al, 1991). Another positive effect of P is the greater development of roots, both in length, surface and total mass yield (Mesquita et al, 2004;Melo et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Forage yield and quality on soil subjected to phosphorus rates in subtropical grassland of Brazil

et al. 2012

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-Phosphorous application effects were evaluated on ryegrass dry matter (DM) accumulation, root development and plant tissue concentration of phosphorus, nitrogen and carbon aiming to determinate the nutritional status of the pasture, as well as to verify the possibility to establish a phosphorus dilution curve for this pasture. Also, the development of phosphorus and ryegrass cultivated with the residual effect of phosphorus fertilization was determined. The experiment was carried out in Pinhais County -Paraná State on a Cambisol with very low phosphorus levels. The experiment was of random blocks design and treatments consisted of five phosphorus rates of triple superphosphate (0, 45, 90, 180 and 360 kg P 2 O 5 ha -1 ) applied to soil surface with four replications. Phosphorus fertilization promoted linear increments in the soil phosphorus availability and resulted, in the first year, in early pasture production and higher phosphorus content in the plant. Nitrogen and carbon contents were not affected. Phosphorous application increased ryegrass DM accumulation in all periods, ranging from 16 to 2826 kg DM ha -1 at flowering stage, for zero and 360 kg P 2 O 5 ha -1 , respectively. Root density was positively influenced by phosphorus supply, and the rate of 45 kg P 2 O 5 ha -1 was effective for maximum root development. The residual effect of phosphorus fertilizer provided enhancement of yield and phosphorus plant concentration for both sorghum and ryegrass in the second year.

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“…Silicon has been reported to increase plant productivity (Melo et al, 2007) and plant resistance against diseases and insects ( Costa and Moraes, 2006;Epstein, 1994;Goussain et al, 2005;Marschner, 1995) by intensification of physiological and mechanical barriers (Korndörfer and Lepsch, 2001). There is strong evidence that Si is effective against sucking insects by acting as a feeding inhibitor that interferes with physiological factors associated with feeding (Gomes et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Resistance inducing agents on the biology and probing behaviour of the greenbug in wheat

Pereira¹,

Moraes²,

Prado³

et al. 2010

Sci. agric. (Piracicaba, Braz.)

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The greenbug Schizaphis graminum (Rond.) (Hemiptera: Aphididae) is one of the main pestinsects of wheat (Triticum aestivum, L.). Resistance inducing agents as silicon (Si) and acibenzolar-s-methyl (ASM) can provide some protection against insects and diseases. The effect of Si and/or ASM on the development and probing behaviour of S. graminum in wheat plants was evaluated. Wheat plants (cultivar Embrapa 22) were treated with Si (silicic acid at the rate of 1%) and acibenzolar-S-methyl (ASM) at the rate of 0.5%. The effects of these treatments on greenbugs were analyzed by development parameters, honeydew excretion and probing behavior monitored by Electrical Penetration Graphs (EPG). The development and honeydew experiments consisted of ten replications each and EPG experiment was replicated 25 times. The application of both resistance inducing agents reduced fecundity, prolonged the duration of pre-reproductive period, and decreased honeydew production. Induced resistance was localized mainly at phloem level and caused a strong reduction of phloem sap ingestion, but some effect of ASM at parenchyma/mesophyll level could not be discounted as far fewer aphids reached the sieve elements. Key words: S. graminum, EPG, ASM, silicon, induced resistance Agentes indutores de resistência na biologia e no comportamento alimentar do pulgão-verde em trigoRESUMO: O pulgão-verde Schizaphis graminum (Rond.) (Hemiptera: Aphididae) é um dos principais insetospraga da cultura do trigo (Triticum aestivum, L.). Agentes que induzem resistência como silício e acibenzolars-methyl (ASM) podem fornecer proteção às plantas contra insetos e doenças. Avaliou-se o efeito do silício e/ ou ASM no desenvolvimento e comportamento alimentar de S. graminum em plantas de trigo. Plantas de trigo cultivar Embrapa 22 foram tratadas com silício (ácido silícico a 1%) e acibenzolar-S-methyl (ASM) a 0.5%. Os parâmetros estudados foram biologia, excreção de honeydew e comportamento alimentar (de prova) monitorado por meio da técnica Electrical Penetration Graphs (EPG). Para o estudo de biologia e excreção de honeydew foram usadas dez repetições e 25 para EPG. A aplicação de agentes indutores de resistência reduziu o número de ninfas, prolongando a duração de período de pré-reprodutivo e o número de gotas de honeydew. O efeito de resistência foi localizado principalmente no floema, com redução de ingestão de seiva elaborada.

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Silicate and phosphate combinations for marandu palisadegrass growing on an oxisol

Cited by 8 publications

References 9 publications

Efeito da adubação com fósforo do capim Mombaça em solos com texturas arenosa e argilosa

Efeito da adubação com fósforo do capim Mombaça em solos com texturas arenosa e argilosa

Forage yield and quality on soil subjected to phosphorus rates in subtropical grassland of Brazil

Resistance inducing agents on the biology and probing behaviour of the greenbug in wheat

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