Características dos substratos na absorção de nutrientes e na produção de gérbera de vaso

Ludwig, Fernanda; Fernandes, Dirceu Maximino; Guerrero, Amaralina Celoto; Bôas, Roberto Lyra Villas

doi:10.1590/s0102-05362014000200011

Cited by 25 publications

(20 citation statements)

References 12 publications

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“…The acidification of the substrates may have occurred due to the plant growth and electrogenic pump activity, H + -ATPase (YI-YONG et al, 2011). These results are in conformity with Ludwig et al (2014), who also observed a decrease in pH of pine bark substrate that turned semi-decomposed at the end of the cultivation cycle of Gerbera jamesonii. It is also noteworthy here that the changes in the substrates pH can occur even without cultivated plants on it, but only with the water addition to the medium.…”

Section: Experiments IIsupporting

confidence: 92%

“…Among chemical properties of the material or mix (substrate), pH and electrical conductivity (EC) holds great importance (KÄMPF et al, 2006;LUDWIG et al, 2014). Constant monitoring of these properties provides the growers an overview of the salinization and acidification of the growth medium, thus making it possible to fertilize substrates without damaging of the growth of the seedlings.…”

Section: Introductionmentioning

confidence: 99%

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Production of desert rose seedlings in different potting media

Colombo¹,

Favetta²,

Carvalho³

et al. 2017

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Over the past decade the desert rose received fame in the flower market due to its striking and sculptural forms; however, the commercial production of these species is quite recent and little is known about its crop management, including substrates recommendation. The objectives of this study were to investigate the effect of different substrates on desert rose seed germination and production of its seedlings. Experiment I: freshly harvested seeds of desert rose were sown in different substrates e.g. sand, coconut fiber, semi-composted pine bark, sand + coconut fiber, semi-composted pine bark + sand and coconut fiber + semicomposted pine bark. These substrates were evaluated to study the emergence percentage of seeds, initial growth of seedlings and seedling emergence speed index (ESI). Experiment II: desert rose from the experiment I were transferred to plastic pots filled with the same substrates as in experiment I. The pH and electrical conductivity (EC) of the substrates were noted every 30 days while the growth parameters of seedlings were recorded after 240 days. Results from experiment I showed higher germination rate and seedling growth in substrates containing semi-composted pine bark. Similarly, in experiment II, better quality seedlings were observed in substrates containing semi-composted pine bark. Thus, for desert rose seed germination and seedling growth, it is recommended to use substrates containing semi-composted pine bark.

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Section: Experiments IIsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Production of desert rose seedlings in different potting media

Colombo¹,

Favetta²,

Carvalho³

et al. 2017

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“…Considering the results of this experiment, there were an average of two flowers per pot, therefore, class II. Ludwig et al (2010) analyzed two gerbera cultivars (Red and Cherry) grown in different substrates, and found that the Red cultivar was characterized by being more floriferous when compared to Cherry, which had fewer inflorescences, however larger. The authors found a propensity towards a better acceptance by plants consisted of inflorescences with a larger diameter, even if their number is lower.…”

Section: Resultsmentioning

confidence: 99%

Response of gerbera inflorescences in function of electrical conductivity and pH solution in substrates

Santos

Costa

et al. 2018

Científica

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The objective of this work was to evaluate the production of gerbera inflorescences under the influence of pH and the electrical conductivity of the solution of the substrates irrigated with liquid organic fertilizers. The experimental design was of randomized blocks, with four replications and five treatments. Treatments were defined according to fertilization source, which were mineral (NPK) and organic. Organic fertilization was obtained by diluting four organic compounds from agroindustry residue (reproductive poultry bedding, hatchery waste, flotation sludge, sausage skins, coal from boilers, truck wash residue solid fraction and sugar cane bagasse) in composting process in water. After compounds obtainment, water dilution was performed, adjusting nutritive solution electrical conductivity values. Substrate solution electrical conductivity (EC) and pH determination was held at 1, 14, 28, 42, and 56 days after acclimatization in a 1:5 dilution (m/v). Potted gerberas inflorescences were evaluated at 56 days after acclimatization. Number of inflorescences (NI), inflorescence dry matter (IDM), stem height (SH), head diameter (HD), and stem diameter (SD) were determined. The electrical conductivity of the solution of the substrate in the mineral fertilizer is above indicated for gerbera culture, reflecting the lower inflorescence stem height. The pH values obtained from the solution of the substrates are within the range for the development of potted gerberas.Additional keywords: Gerbera jamesonii; liquid organic fertilizers; salinity. ResumoO objetivo do trabalho foi avaliar a produção de inflorescências de gérbera sob a influência do pH e da condutividade elétrica da solução dos substratos irrigados com fertilizantes orgânicos líquidos. O delineamento experimental foi o de blocos casualizados, com quatro repetições e cinco tratamentos. Os tratamentos foram definidos de acordo com a fonte de fertilização, mineral (NPK) e orgânico. Adubação orgânica foi obtida por meio da diluição de quatro compostos orgânicos diluídos em água, obtidos de resíduos agroindustriais (cama de frango, resí-duos de incubadora, lodo de flotador, tripa celulósica de salsichas, carvão de caldeiras, fração sólida do dejeto suíno e bagaço de cana), no processo de compostagem. Após a obtenção dos compostos orgânicos, realizou-se a diluição com água, ajustando os valores de condutividade elétrica na solução nutritiva. A determinação na solução do substrato da condutividade elétrica (CE) e de pH foi realizada em 1; 14; 28; 42 e 56 dias após a aclimatização em 1:5 (m/v). As inflorescências das gérberas envasadas foram avaliadas aos 56 dias após a aclimatação. Foram determinados número de inflorescências, matéria seca de inflorescências, altura da haste, diâmetro do coleto e diâmetro da haste. A condutividade elétrica na solução do substrato no adubo mineral apresenta-se acima do indicado para a cultura de gérberas, refletindo na menor altura de haste das inflorescências. Os valores de pH medidos na solução dos substratos estão dentro d...

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“…O sistema de produção em substratos vem sendo empregado na maioria dos cultivos comerciais de plantas ornamentais (LUDWIG et al, 2014), e em função dos recipientes apresentarem um volume reduzido para o crescimento radicular, deve-se atentar para a questão nutricional. Para evitar perdas de qualidade, é importante realizar o manejo nutricional, sendo a condutividade elétrica da solução do substrato uma medida indireta de nutrientes disponíveis para as plantas (MOTA et al, 2016;TORRES et al, 2010), que pode ser efetuada de forma rápida no próprio ambiente de cultivo.…”

Section: Introductionunclassified

Adaptação do “PourThru” para avaliação de substratos com diferentes granulometrias

Ludwig

Guerrero

Ferreira³

et al. 2017

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Adaptation of "PourThru" for evaluation of substrates with different granulometriesPeriodic monitoring of the substrate solution allows the nutritional control of plants to be done more quickly and conveniently. In order to this monitoring become a routine among the producers of potted flowers, a standardization of non-destructive methods and easy application are required. This study was conducted in order to adapt of the "PourThru" methodology for substrate evaluation with different particle sizes. It was conducted on substrates with different particle sizes. Two tests were performed to define the amount of water to be applied, the time between irrigation and the collect of the leachate. Both tests were done using substrates with grain size 4-2 mm, 2-1 mm <4 mm <2 mm <1 mm and four repetitions. For the test I, we used the factorial 5 x 4 (5 particle sizes and 4 volumes of water), with volumes of 50, 75, 100 and 125 mL. For test II, we used the 5 x 5 factorial (5 granulometry balance and 5 times), with times of 30, 60, 90, 120 and 150 minutes. The leach solution was evaluated for electrical conductivity and pH. The methodology presented showed constraints when the substrates had particle sizes between 4 and 2 mm, and less than 1 mm. The larger the particle sizes is, the greater is the formation of preferential channels that leads to the possibility of mixing the water used as carrier and the solution to be leached is. The smaller the particle size is, the greater is the tendency of adsorption of the nutrients by the particles. For the pine bark substrate and vase with 1.3 L, it is suggested 60 minutes as settling time and the application of 75 mL of water for leaching the displacement.

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Características dos substratos na absorção de nutrientes e na produção de gérbera de vaso

Cited by 25 publications

References 12 publications

Production of desert rose seedlings in different potting media

Production of desert rose seedlings in different potting media

Response of gerbera inflorescences in function of electrical conductivity and pH solution in substrates

Adaptação do “PourThru” para avaliação de substratos com diferentes granulometrias

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