Crescimento de Eucalyptus urophylla em Meio Hidropônico com Diferentes Proporções de Nitrato e Amônio

Guimarães, Maycon Murilo Castro; Cairo, Paulo Araquém Ramos; Neves, Orlando Sílvio Caires

doi:10.4322/floram.2014.011

Cited by 11 publications

(10 citation statements)

References 29 publications

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“…Additionally, in Lemna minor, the toxicity of NH 4 + affected the aerial part of the plants, changing the leaf color from green to yellow, and the roots of the plants (Huang et al 2013). Other studies demonstrated the presence of a critical concentration for the toxicity of NH 4 + , as is the case of Pisum sativum, starting from 2.8 mmol L −1 (Cruz et al 2011), and Eucalyptus grandis, at 2.0 mmol L −1 (Guimarães et al 2014).…”

Section: Discussionmentioning

confidence: 98%

Silicon Supplementation Alleviates Ammonium Toxicity in Sugar Beet (Beta vulgaris L.)

Viciedo

Prado

Toledo

et al. 2019

J Soil Sci Plant Nutr

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The purpose of this study is to evaluate the relationship between Si and NH4+ toxicity in the context of the nutrition, physiology, and production of sugar beet grown using hydroponics. We hypothesized that NH4+ affects the physiology of the plant, accumulation of nutrients, and dry matter, with the possibility for Si to mitigate this toxicity. The experimental design used was completely randomized, in a factorial scheme of 2 × 5, corresponding with the absence and presence of Si (2 mmol L −1) and five concentrations of NH4+ with four replicates. The following series of physiological evaluations were carried out: photosynthesis, stomatal conductance, transpiration, with the use of an infrared gas analyzer (LICOR, Inc., LI-6400), the dry biomass, N and Si accumulation, and Si use efficiency in the roots. Accumulation of N and photosynthesis in the leaves was higher in the presence of Si. An increase of NH4+ increased transpiration, especially in the plants cultivated without the incorporation of Si. Stomatal conductance was lower in the presence of Si. Dry matter was reduced when plants were exposed to higher concentrations of NH4+, showing a greater reduction in the root than in the aerial part. The use of NH4+ equal to or higher than 15 mmol L −1 damaged the photosynthesis. Transpiration and stomatal conductance were less affected in the presence of Si and in the accumulation of N and Si in the roots. Dry matter was reduced when plants were exposed to higher concentrations of NH4+, and this effect was mitigated in the presence of Si. Keywords Abiotic stress. Ammoniacal nitrogen. Beneficial element. Vegetables Highlights The negative effects caused by the toxicity of NH 4 + in sugar beet plants, up to concentrations of 15 mmol L −1 , can be mitigated by the presence of Si.

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Section: Discussionmentioning

confidence: 98%

Silicon Supplementation Alleviates Ammonium Toxicity in Sugar Beet (Beta vulgaris L.)

Viciedo

Prado

Toledo

et al. 2019

J Soil Sci Plant Nutr

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“…Only a few studies have addressed the effects caused by the exposure of plants to excess NH 4 + in the culture medium, with consequences in plant nutrition, especially in the decrease of the cations accumulation (such as K and Ca) in plant tissues. Some of these works were performed with Brassica napus (Arkoun et al., ), Brassica oleracea (Barreto et al., ), Zea mays (Zanin et al., ), Passiflora edulis (Silva Júnior et al., ), Eucalyptus urophylla (Guimarães et al., ), Solanum lycopersicum ( Borgognone et al., ), Pisum sativum (Ariz et al., ), and Cucumis sativus (Roosta & Schjoerring, ).…”

Section: Ammonium Toxicity Effects From a Crop‐physiology Pointmentioning

confidence: 99%

“…In general, when the NH 4 + concentration is higher than the NO 3 − concentration in the culture medium, the K + , Ca 2+ , and Mg 2+ contents decrease. Conversely, higher NO 3 − contents cause PO 4 − and SO 4 2− depletion (Guimarães et al., ; Zeng et al., ) due to the competitive behavior of these cations and anions by the same transporters (ten Hoopen et al., ).…”

Section: Ammonium Toxicity Effects From a Crop‐physiology Pointmentioning

confidence: 99%

Silicon mitigates ammonium toxicity in plants

et al. 2020

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The search for high yield has identified ammonium toxicity as a problem in arable soils world wide. Ammonia toxicity can be suppressed by the use of silicon, but this fact still needs to be elucidated. Therefore, this review aimed to highlight the harmful effects of ammonium toxicity on model plants, and to determine the effects of Si on the mitigation of abiotic stress. Some plant species are considered as tolerant, and others as sensitive to high N concentrations. In sensitive plants, high ammonium concentrations may hinder the plant's development and even lead to the plant's death due to biochemical, physiological, and nutritional changes. Studies have demonstrated that silicon can mitigate or alleviate the deleterious effects caused by the toxic effect of NH 4 + . These findings were attributed to improvements in the physiological and nutritional parameters of plants. Given the importance of ionic balance between N forms for the plant's development, further studies must be performed to detect mechanisms promoted by Si to decrease or mitigate the harmful effects caused by excess ammonium in plants.Agronomy Journal. 2020;112:635-647. wileyonlinelibrary.com/journal/agj2 635

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“…Most plants develop toxicity when cultivated only with ammonia. According to some authors the foliar area, the stem diameter and the height of the plants can be affected by the excess of ammonium (MENDOZA-VILLARREAL et al, 2015;CAIRO;NEVES, 2014). It was observed that the number of fruits of plants submitted to Formulation 4 diferred statistically from the other treatments, presenting lower value.…”

Section: Length Of Branches and Number Of Leavesmentioning

confidence: 99%

Effects of Dairy Farm Wastewater Use in Cultivation on Fig Tree (Ficus Carica L.)

Silva¹,

Martinez²,

Salomão³

et al. 2020

R_I

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EFFECTS OF DAIRY FARM WASTEWATER USE IN CULTIVATION ON FIG TREE (FICUS CARICA L.) JONATHAS BATISTA GONCALVES SILVA1; MAURO APARECIDO MARTINEZ2; LUIZ CARLOS CHAMHUM SALOMÃO3; PAULO ROBERTO CECON4; ANTONIO TEIXEIRA DE MATOS5 E LEONARDO DUARTE BATISTA DA SILVA6 1Departamento de Engenharia Sanitária e Ambiental, UFJF, Rua José Lourenço Kelmer, s/n,Bairro São Pedro, 36036-900, Juiz de Fora, MG, Brasil, jonathas.silva@engenharia.ufjf.br. 2Departamento de Engenharia Agrícola, UFV, Av. Peter Henry Rolfs, s/n, 36570-900, Viçosa, MG, Brasil, mmauro@ufv.br 3Departamento de Fitotecnia, UFV, Av. Peter Henry Rolfs, s/n, 36570-900, Viçosa, MG, Brasil, lsalomao@ufv.br 4Departamento de Estatística, UFV, Av. Peter Henry Rolfs, s/n, 36570-900, Viçosa, MG, Brasil,cecon@ufv.br. 5Departamento de Engenharia Sanitária e Ambiental, UFMG, Avenida Presidente Antônio Carlos, 6627, Bairro Pampulha,31270-901, Belo Horizonte, MG, Brasil,atmatos@desa.ufmg.br 6Departamento de Engenharia, UFRRJ, Rodovia BR 465,km 7, s/n,23890-000, Seropédica, RJ, Brasil, monitoreambiental@gmail.com 1 ABSTRACT The purpose of this study was to evaluate the effects of dairy farm wastewater (DFW) use on fig tree growth, production, on fig health standard and on nutrient concentration in fig tree leaves. The study was developed in the Integrated Agroecological System area, in Seropédica (RJ, Brazil) between June 2011 and May 2012. The applied fertilizer formulations were: Formulation 1, 100% of nitrogen dose recommended for fig tree supplied by fertilizing with castor bean cake (CB); Formulation 2, 50% of nitrogen dose supplied by DFW application and 50% of nitrogen dose supplied by CB; Formulation 3, 75% of nitrogen dose supplied by DFW application and 25% of nitrogen dose from CB; Formulation 4, 100% of nitrogen dose supplied by DFW application.Data were submitted to analysis of variance and the averages were compared by Tukey’s test at 10% probability. The results demonstrated that branches length, number of leaves per branch, number of fruits, production and yield were lower in plants submitted to Formulation 4. Contamination of fruits by thermotolerant coliforms or Salmonellasp did not occur after DFW use as fertilizer. The results showed that the use of DFW in fig tree cultivation was sufficient to provide the nutritional needs of plants, as regards macronutrients and Fe. Keywords: fertirrigation, environmental impact, final disposal of effluents and crop nutrition. SILVA, J.B. G.; MARTINEZ, M. A.; SALOMÃO, L. C. C.; CECON,P. R.; MATOS, A. T.; SILVA, L. D. B. EFEITOS DO USO DE ÁGUA RESIDUÁRIA DE BOVINOCULTURANO CULTIVO DA FIGUEIRA (FICUS CARICA L.) 2 RESUMO Objetivou-se com este trabalho avaliar os efeitos do uso da água residuária de bovinocultura de leite (ARB) no crescimento, produção, padrão fitossanitário dos frutos e na concentração de nutrientes nas folhas da figueira. As formulações de adubação aplicadas foram: Adubação 1 - 100% da dose de nitrogênio fornecida pela adubação com torta de mamona (TM); Adubação 2 - 50% da dose de nitrogênio comaplicação de ARB e 50% com TM; Adubação 3 - 75% da dose de nitrogênio com aplicação de ARB e os outros 25% da dose com TM; Adubação 4 - 100% da dose de nitrogênio com aplicação da ARB. Os resultados foram submetidos à análise de variância e as médias comparadas utilizando-se o Teste de Tukey a 10% de probabilidade. Diante dos resultados verificou-se que comprimento dos ramos, o número de folhas por ramos, o número de frutos, a produção e a produtividade foram menores nas plantas submetidas à Adubação4. Não ocorreu contaminação dos frutos por coliformes termotolerantes e Salmonella sp. Diante dos resultados concluiu-se que o uso de ARB no cultivo da figueira não proporciona deficiência nutricional às plantas no que se refere aos macronutrientes (N, Ca, Mg, K e P). Palavras-chave: fertirrigação, impacto ambiental, disposição final de efluentes, nutrição vegetal.

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Crescimento de Eucalyptus urophylla em Meio Hidropônico com Diferentes Proporções de Nitrato e Amônio

Cited by 11 publications

References 29 publications

Silicon Supplementation Alleviates Ammonium Toxicity in Sugar Beet (Beta vulgaris L.)

Silicon Supplementation Alleviates Ammonium Toxicity in Sugar Beet (Beta vulgaris L.)

Silicon mitigates ammonium toxicity in plants

Effects of Dairy Farm Wastewater Use in Cultivation on Fig Tree (Ficus Carica L.)

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