Growth and production of ornamental sunflower grown in the field in response to application of humic acids

Baldotto, Lílian Estrela Borges; Baldotto, Marihus Altoé

doi:10.1590/0103-8478cr20140050

Cited by 8 publications

(5 citation statements)

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“…Somados aos efeitos dos ácidos húmicos no enraizamento, ressaltam-se, também, os efeitos estimulantes na parte aérea, como incrementos do acúmulo de nutrientes foliares (Vaughan & Malcolm, 1979;Chen & Avaid, 1990;Chen et al, 2004;Eyheraguibel et al, 2008;Baldotto et al, 2009b;Mora et al, 2010;Jannin et al, 2012), da biossíntese de clorofilas (Tejada & Gonzalez, 2003;Ferrara & Brunetti, 2008;Baldotto et al, 2009b;Ameri & Tehranifar 2012;Jannin et al, 2012;Ahmad et al, 2013), da biossíntese de carotenoides (Tejada & Gonzalez, 2003;Baldotto et al, 2009b), da presença de cloroplastos (Jannin et al, 2012) e do processo fotossintético (Ameri & Tehranifar 2012;Jannin et al, 2012). Todos esses fatores resultam em incrementos da biomassa vegetal (Atiyeh et al, 2002;Tejada & Gonzalez, 2003;Baldotto et al, 2009b;Wangen et al, 2013;, da produção de flores (Arancon et al, 2006;Baldotto & Baldotto, 2014a), de frutos (Arancon et al, 2006;Lima et al, 2011) e de sementes (Baldotto & Baldotto, 2014c).…”

Section: Bioatividade Dos áCidos Húmicosunclassified

“…O potencial de uso de ácidos húmicos na conservação e manejo dos ecossistemas naturais e agrários é vasto e promissor, incluindo, principalmente, a promoção do crescimento e desenvolvimento de plantas e o aumento da produção de flores, frutos e sementes (Arancon et al, 2006;Baldotto & Baldotto, 2014a, b). Estudos recentes demonstram também o potencial de uso de ácidos húmicos no aumento da eficiência da adubação mineral (Pinto et al, 2008;Ahmad et al, 2013;Baldotto et al, 2011c, Baldotto & Baldotto, 2014a e na formulação de inoculantes e biofertilizantes (Marques Jr. et al, 2008;Baldotto et al, 2010b;Rodrigues et al, 2014). Baldotto et al (2011a), por exemplo, demonstraram, de forma inovadora, o potencial de uso de ácidos húmicos (9,3 mmol L -1 de C, na forma de ácidos húmicos de vermicomposto) combinados com ácido cítrico (0,005 mmol L -1 ), no aumento da eficiência da adubação foliar de abacaxizeiro com fosfato de rocha (fosfato de Araxá), observando aumento dos conteúdos foliares de N, P, K, Ca e Mg e do crescimento da parte aérea das mudas.…”

Section: Bioatividade Dos áCidos Húmicosunclassified

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Ácidos húmicos

Baldotto

2014

Rev. Ceres

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Qual é a estrutura molecular das substâncias húmicas? Ainda não foi possível encontrar a resposta. Há muita controvérsia e pouco consenso sobre as estruturas dessas substâncias. Destacam-se dois pontos principais: o acúmulo de informações e os desafios metodológicos. Esta revisão objetivou reunir informações sobre a natureza dos ácidos húmicos e suas funções nos ecossistemas naturais e agrários, visando ao manejo e à conservação, bem como às oportunidades tecnológicas para o desenvolvimento de novos insumos para a agricultura tropical.

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Section: Bioatividade Dos áCidos Húmicosunclassified

Ácidos húmicos

Baldotto

2014

Rev. Ceres

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“…Similar results were found by Mota et al (2007) and Pirola et al (2015) whom noticed increments in plant height when increasing the dosage of the applied treatment. This is due to the fact that these nutrients are involved in cell elongation and division, and also because they are fundamental constituents of organelles and compounds involved in photosynthesis, especially nitrogen, thus resulting in response of stem length (BARBOSA et al, 1999;RODRIGUES et al, 2008;CASTRO et al, 2011;BALDOTTO and BALDOTTO, 2015).…”

Section: Dry Matter Of Leaves Stems and Length Of Stemsmentioning

confidence: 99%

Production and quality of three varieties of chrysanthemum grown in pots with different NPK rates

Heidemann

Barbosa

2017

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Chrysanthemum can be grown for cutting or as a pot plant year-round, providing a constant production flow. In Brazil, little is known about mineral nutrition and fertilization for this crop. Thus, the objective of this work was to evaluate the production and quality of chrysanthemum varieties cultivated in pots with different NPK rates. The experiment was conducted in a completely randomized design with the NPK rates (10-10-10) of 3 g L -1 , 6 g L -1 and 9 g L -1 and chrysanthemum varieties Sheena, Calabria and Indianapolis. Pots of 1.2 L capacity were filled with substrate and placed three cuttings per pot kept in a fog chamber under long days. After 21 days, apical pruning was done and started the short-day period. After flowering induction, short days were suspended. It was realized analysis of variance and it was noticed that stem length and EC were affected by NPK rates. It was observed an inverse relation between the increase in NPK rate and cultivation cycle, resulting in precocity of flowering for all varieties. Plants cultivated under 9 g L -1 rate did not present toxicity symptoms, suggesting that this dose was more adequate for the production of pot plants for all three varieties. Keywords: Dendranthema grandiflora Tzvelev, floriculture, electrical conductivity, mineral nutrition. RESUMO Produção e qualidade de três variedades de crisântemo em vaso sob diferentes doses de NPKO crisântemo pode ser cultivado para produção de flores de corte ou como planta para vaso durante o ano todo, proporcionando um fluxo de produção constante. No Brasil, as informações a respeito da nutrição mineral e adubação para a cultura são ainda pouco frequentes. Assim, o objetivo do trabalho foi avaliar a produção e qualidade de plantas de três variedades de crisântemo cultivadas em vaso sob diferentes doses de NPK. O experimento foi conduzido em delineamento inteiramente casualizado com as doses de NPK (10-10-10) 3 g L -1 , 6 g L -1 e 9 g L -1 e as variedades Sheena, Calabria e Indianapolis. Vasos de 1,2 L foram preenchidos com substrato e utilizadas três estacas por vaso e mantidos em câmara de nebulização sob dias longos (DL). Após 21 dias, foi realizada a poda apical e iniciou-se o fornecimento de dias curtos (DC). Após a indução do florescimento, o DC foi suspenso. Realizouse análise de variância, constatando-se que o comprimento das hastes e a condutividade elétrica foram afetados pelas doses de NPK. Observou-se relação inversa entre aumento da dose de NPK e ciclo de cultivo, resultando na redução do ciclo para as três variedades. As plantas cultivadas sob a dosagem de 9 g L -1 não apresentaram sintomas de toxidez, sugerindo que esta dose foi mais adequada para a produção de plantas em vaso de alta qualidade para as três variedades. Palavras-chave: Dendranthema grandiflora Tzvelev, condutividade elétrica, floricultura, nutrição mineral.

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“…Sarwar et al (2019), Rady et al (2020), andAbd El-Mageed et al (2020) reported that the exogenous-applied nutrients induced heat and drought stress tolerance in cotton, wheat, and maize crops, respectively, by modulating their morpho-physiological characteristics. HA as a multi-nutrient fertilizer or soil conditioner can mend soil hydro-physical characteristics, nutrients uptake and consequently improve photosynthesis, growth, and yield in normal and stressed plants (Baldotto and Baldotto 2015;Hemida et al 2017). Exogenous addition of HA as an eco-friendly organic fertilizer to the soil has both direct and indirect positive influences on crop plants (Rady et al 2016;Belal et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Culture Management and Application of Humic Acid in Favor of Helianthus annuus L. Oil Yield and Nutritional Homeostasis in a Dry Environment

Mekdad

El-Sherif

Rady

et al. 2021

J Soil Sci Plant Nutr

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This research aimed to investigate the prospected desirable influences of sowing date, planting density, and soil enrichment with humic acid (HA) on the growth and uptake of macro and micronutrients and their implications on the productivity of sunflower plants grown in dry, saline, and nutrient-deficient environment. Two field trials were conducted in two seasons (2018 and 2019) by planting the sunflower plants on two dates, one early (on May 5) and the other late (on May 30) under three planting densities of 95.2 (high), 71.4 (medium), and 57.1 (low) thousand plants ha −1 and soil enrichment with three rates of HA [0 (HA 0 ), 24 (HA 24 ), and 48 kg ha −1 (HA 48 )]. Early sowing date with soil HA 48 under low planting density was the best combination for optimizing sunflower's growth, while early sowing date with HA 48 under high planting density was best for the macro and micronutrient contents of shoots and seeds, as well as seed, oil (OY), and protein yields. With the application of automatic linear modeling analysis, seed yield, oil%, stem diameter, harvest index, shoot dry weight, plant height, and seed yield plant −1 were selected as the characteristics most contributing to OY in predicting stressed sunflower's OY. Due to the ever-climate changes, choosing an appropriate sowing date, as a non-monetary practice, and optimal planting density with adequate anti-stress (e.g., HA) substance to enrich the low-fertile saline soils is the safest effective way to maintain global food security and sustainable agricultural development in dry environments.

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Growth and production of ornamental sunflower grown in the field in response to application of humic acids

Cited by 8 publications

References 13 publications

Ácidos húmicos

Ácidos húmicos

Production and quality of three varieties of chrysanthemum grown in pots with different NPK rates

Culture Management and Application of Humic Acid in Favor of Helianthus annuus L. Oil Yield and Nutritional Homeostasis in a Dry Environment

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