Níveis de potássio em fertirrigação interferindo no crescimento/desenvolvimento e qualidade do crisântemo

Rodrigues, Tatiana Michlovská; Rodrigues, Carlos Ribeiro; Paiva, Renato; Faquin, Valdemar; Paiva, Patrícia Duarte de Oliveira; Paiva, Luciano Vilela

doi:10.1590/s1413-70542008000400020

Cited by 4 publications

(1 citation statement)

References 2 publications

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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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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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Nutrition and Quality in Ornamental Plants

Neto

Boldrin

Mattson

2015

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<p>The visual quality of ornamental plants is necessarily linked to an adequate balance of nutrients. Plant height, shape and coloration are qualitative aspects of ornamental species, directly influenced by mineral nutrition, among other environmental aspects. The nutritional requirements of ornamental species are not yet well established, often resulting in inefficient use of chemical and organic fertilizers, without respecting the needs of each species as well as the proper time for application. This leads to the low quality of the final product, as well as high production costs, which justifies the importance of a nutritional knowledge of the species. In addition to plant nutrients, some elements not considered essential, such as silicon, may provide improvements in the quality of certain species, including ornamental plants. In this sense, this paper aims to compile information on the use of nutrients for ornamental species in order to contribute to the knowledge of the principal aspects of plant quality as relates to mineral nutrition.</p>

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Photo-selective nets and potassium concentrations on Costus lasius crop

Sampaio

Rodrigues

Duarte

et al. 2020

Rev. bras. eng. agríc. ambient.

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The practice of using different photo-selective nets, associated with the technique of fertigation, represents a new agrotechnological concept that aims to promote specific physiological responses for growth and production, which are regulated by light. The aims of the study were to evaluate the effect of photo-selective nets and potassium concentrations in the fertigation solution on the horticultural performance of Costus lasius. The study was conducted at the Universidade de São Paulo, ESALQ, Piracicaba, SP, Brazil. Three experiments were carried out separately to evaluate five potassium concentrations in the fertigation solution (40, 80, 120, 160 and 200 mg L-1) under three colours of photo-selective nets (red, blue and black) in a randomized block design, with five repetitions. The variables plant height and numbers of leaves, stems and flower buds were evaluated. The data were submitted to the joint analysis of experiments. The association between the K+ concentration of 200 mg L-1 and the black photo-selective net results in higher stem and inflorescence production.

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Níveis de potássio em fertirrigação interferindo no crescimento/desenvolvimento e qualidade do crisântemo

Cited by 4 publications

References 2 publications

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

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

Nutrition and Quality in Ornamental Plants

Photo-selective nets and potassium concentrations on Costus lasius crop

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