Crescimento de mudas de Eucalyptus camaldulensis em substratos à base de casca de arroz carbonizada

Kratz, Dagma; Wendling, Ivar

doi:10.1590/0034-737x201663030011

Cited by 37 publications

(47 citation statements)

References 8 publications

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“…Addition of these materials of different diameters, the mixture improved the physical characteristics of the dry coconut powder used alone together with the vermiculite and the Bioplant® the lowest results of root dry matter (1.49 g, 1.47 g and 1.50 g respectively). Corroborating with results obtained by Kratz et al (2012), worked with eucalyptus where they verified that differences in the diameter of the particles of the rice husk and the carbonized rice hull influence the aeration of the substrates in which they are used in the formulation, thus facilitating the development of the roots.…”

Section: Resultssupporting

confidence: 65%

Regional Substrates of the Brazilian Northeast on Acclimatization and Development Morphological of Minirose

Anjos¹,

Dias²,

Hernández³

et al. 2018

JAS

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The transition from heterotrophism to autotrophism in acclimatization is a delicate process for most species. The objective of this work was to evaluate combinations of regional substrates of the Brazilian Northeast in the acclimatization and morphological development of minirose (Rosa chinensis 'Minima') seedlings. The experiment was carried out in a greenhouse using seedlings with 30 days of in vitro culture. The treatments were constituted by: 1) dry coconut powder; 2) 75% dry coconut powder + 25% rice husk; 3) 50% dry coconut powder + 50% rice husk; 4) 75% dry coconut powder + 25% charcoal rice husk; 5) 50% dry coconut powder + 50% carbonized rice husk; 6) 100% vermiculite; 7) 50% vermiculite + 50% dry coconut powder; 8) commercial substrate; 9) 75% sand + 25% dry coconut powder and 10) 50% sand + 50% dry coconut powder. After 21 days, the following characteristics were evaluated: survival percentage, leaf number, shoot height, dry matter of shoot and root and total dry matter. The regional materials tested showed a good choice of substrates to be used in the acclimatization of minirose seedlings. The vermiculite presented the worst results in the characteristics evaluated. Dry coconut powder as substrate should be used in mixtures with other materials to provide better acclimatization conditions. The use of 50% dry coconut powder + 50% rice husk provided a best development and growth of minirose seedlings (Rosa chinensis 'Minima') than other tested substrates

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Section: Resultssupporting

confidence: 65%

Regional Substrates of the Brazilian Northeast on Acclimatization and Development Morphological of Minirose

Anjos¹,

Dias²,

Hernández³

et al. 2018

JAS

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“…Eucalypt cuttings are often harvested from either apical or sub-apical positions, or both, on the shoots of stock plants, with the position depending on the stock plant system, the frequency of cutting collection, the species, and the developmental phase of the shoot tips [3,5,7,9,17,[37][38][39][40][41]. Eucalypt cuttings, therefore, may have either a four-pointed stellate or rectangular shape in cross-section.…”

Section: Discussionmentioning

confidence: 99%

Stem Anatomy and Adventitious Root Formation in Cuttings of Angophora, Corymbia and Eucalyptus

Bryant

Trueman

2015

Forests

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Abstract:Many plantation eucalypts are difficult to propagate from cuttings, and their rooted cuttings often possess very few adventitious roots. We microscopically examined the stem anatomy of cuttings from 12 species of eucalypts and we determined whether adventitious root formation in auxin-treated cuttings of four species was limited to particular positions around the vascular tissue. Most species contained a central pith that was arranged in a four-pointed stellate pattern. The surrounding vascular tissue was also arranged in a stellate pattern near the shoot apex but it developed a more rectangular shape at the outer phloem as the stems enlarged radially. Adventitious roots formed at, or slightly peripheral to, the vascular cambium, and they formed at both the corners and the sides of the rectangular-shaped vascular tissue. The study highlighted that auxin-treated eucalypt cuttings can produce roots at multiple positions around the vascular tissue and so propagation methods can aim to produce more than four adventitious roots per rooted cutting. Higher numbers of adventitious roots could improve the root system symmetry, stability, survival and growth rate of clonal eucalypt trees.

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“…A substrate for seedlings should have low density and good water retention capacity (Altland & Krause, 2012); biochar, when present in substrate compositions, increases water retention both at low and high matric potentials, and improves the conditions for the development of seedlings (Souza et al, 2006;Lazcano et al, 2009). Specifically for the minicutting propagation technique, the substrate used for rooting of seedlings has to provide adequate aeration, moisture, and the necessary nutrition for root development (Kratz et al, 2012). However, appropriate substrate for rooting depends on the species (of biochar and seedlings), type of stake, propagation system, cost, and availability of components.…”

Section: Introductionmentioning

confidence: 99%

Biochar in substrate composition for production of teak seedlings

Rezende

Santos

Maia

et al. 2016

Pesq. agropec. bras.

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-The objective of this work was to evaluate the development and quality of clonal seedlings of teak (Tectona grandis) grown in substrate with two types of biochar. The assay was carried out in a randomized complete block design, with ten treatments and four replicates: CS, commercial substrate, composed of pine bark and vermiculite at a ratio of 4:1; NS, nursery substrate composed of carbonized rice husk and coconut fiber at 1:1; and the remaining treatments were composed of the inclusions of biochar (BC) or activated biochar (BCA) in the CS, at the proportions of 25, 50, 75, and 100%. The development and quality parameters of seedlings were evaluated 90 days after striking the minicuttings in the substrates. BCA substrate additions at 25, 50, and 100% allowed for a development of height and stem diameter comparable to that of the NS. Biochar without the activation procedure does not improve quality parameters of seedlings, in comparison with the commercial substrate. The use of 25% activated biochar added to the commercial substrate is enough to improve seedling growth performance to the same level as that provided by the already validated NS.Index terms: Tectona grandis, agroindustrial waste, biochar activity, pyrolysis, seedling quality. Biochar na composição de substratos para a produção de mudas de tecaResumo -O objetivo deste trabalho foi avaliar o desenvolvimento e a qualidade de mudas clonais de teca (Tectona grandis) cultivadas em substrato com dois tipos de biochar. O ensaio foi realizado em delineamento de blocos ao acaso, com dez tratamentos e quatro repetições: SC, substrato comercial, composto de casca de pinus e vermiculita à proporção de 4:1; SV, substrato do viveiro, composto de casca de arroz carbonizada e fibra de coco a 1:1; e o restante dos tratamentos foi composto de inclusões de biochar (B) e biochar ativado (BA), nas proporções de 25, 50, 75 e 100% do SC. Os parâmetros de desenvolvimento e qualidade das mudas foram avaliados 90 dias após o plantio das estacas nos substratos. A adição de 25, 50 e 100% de BA possibilitou o desenvolvimento em altura e diâmetro do coleto comparável ao proporcionado pelo SV. O biochar sem o procedimento de ativação não melhora os parâmetros de qualidade das mudas, em comparação ao substrato comercial. A adição de biochar ativado na proporção de 25% já é suficiente para melhorar o crescimento das mudas para o mesmo nível proporcionado pelo já validado SV.Termos para indexação: Tectona grandis, resíduo agroindustrial, atividade do biochar, pirólise, qualidade de mudas.

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Crescimento de mudas de Eucalyptus camaldulensis em substratos à base de casca de arroz carbonizada

Cited by 37 publications

References 8 publications

Regional Substrates of the Brazilian Northeast on Acclimatization and Development Morphological of Minirose

Regional Substrates of the Brazilian Northeast on Acclimatization and Development Morphological of Minirose

Stem Anatomy and Adventitious Root Formation in Cuttings of Angophora, Corymbia and Eucalyptus

Biochar in substrate composition for production of teak seedlings

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