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Registros recuperados: 14
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Biochar in substrate composition for production of teak seedlings PAB
Rezende,Fabiana Abreu; Santos,Victor Alexandre Hardt Ferreira dos; Maia,Claudia Maria Branco de Freitas; Morales,Marina Moura.
Abstract 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...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tectona grandis; Agroindustrial waste; Biochar activity; Pyrolysis; Seedling quality.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000901449
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Calidad de planta de Enterolobium cyclocarpum y Swietenia humilis. Colegio de Postgraduados
Basave Villalobos, Erickson.
Con base en el contexto de que la poda aérea y la fertilización en vivero son prácticas culturales que mejoran la calidad de planta siempre y cuando la intensidad de poda y el régimen de fertilización sean apropiados; se examinaron los efectos de tres intensidades de poda aérea (0%, 25% y 50%) y de dos regímenes de fertilización (tradicional y exponencial) en plantas de Swietenia humilis mediante la evaluación de diversos indicadores morfológicos y fisiológicos de calidad, y de un ensayo de prueba de calidad. No existió una sinergia entre ambas prácticas; no obstante, de manera independiente cada factor influyó en los indicadores evaluados. La poda aérea tanto al 25% como al 50% no mejoró la calidad de planta de S. humilis. En cambio, el suministro de...
Palavras-chave: Caobilla; Calidad de la planta; Poda aérea; Fertilización exponencial; Seedling quality; Top pruning; Exponential fertilization; Forestal; Maestría.
Ano: 2013 URL: http://hdl.handle.net/10521/2150
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Cardinal temperatures for the leaf development of Corymbia citriodora and Eucalyptus urophylla seedlings PAB
Freitas,Cleverson Henrique de; Martins,Fabrina Bolzan; Abreu,Marcel Carvalho.
Abstract: The objective of this work was to estimate cardinal temperatures and phyllochron for the leaf development of the eucalyptus species Corymbia citriodora and Eucalyptus urophylla, in the seedling phase. A field experiment was carried out in a completely randomized design, in a 2x11 factorial arrangement, with the two eucalyptus species, 11 sowing dates, and five replicates, in the municipality of Itajubá, in the state of Minas Gerais, Brazil. The cardinal temperatures - base, optimum, and maximum - for leaf development were, respectively, 8.7, 17.1, and 41.3°C, for C. citriodora, and 11.5, 17.1, and 40.5°C for E. urophylla. The phyllochron of C. citriodora was 62.95°C day per leaf, and that of E. urophylla was 46.03°C day per leaf, which indicates...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Air temperature; Leaf emission rate; Phyllochron; Seedling quality; Thermal requirement.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000500283
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Efecto de la condición ambiental y la fertilización en el preacondicionamiento de Pinus engelmannii CARR. en el vivero y su desempeño en campo. Colegio de Postgraduados
García Pérez, José Luis.
El preacondicionamiento de la planta se realiza durante la etapa final de vivero y tiene como propósito favorecer su lignificación para que sea capaz de tolerar el estrés hídrico, nutricional y mecánico en los sitios de plantación. Esto se logra mediante un manejo adecuado de prácticas culturales como la fertilización y los riegos, mientras se elimina el efecto invernadero las plantas se exponen a condiciones ambientales de temperatura, humedad relativa e intensidad de luz, semejantes a las presentes en el campo. Se evaluó el efecto de: a) cuatro condiciones ambientales (invernadero, intemperie, malla sombra y malla sombra más intemperie) y b) tres niveles de fertilización (sin fertilización, dosis baja y dosis alta) y la interacción de éstos durante el...
Palavras-chave: Pinus engelmannii; Calidad de planta; Fisiología; Morfología; Nutrimentos; Seedling quality; Physiology; Morphology; Nutrients; Forestal; Maestría; Condición ambiental.
Ano: 2014 URL: http://hdl.handle.net/10521/2334
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Establishing Acacia salicina under dry Mediterranean conditions: The effects of nursery fertilization and tree shelters on a mid-term experiment with saline irrigation Ciencia e Investigación Agraria
Oliet,Juan A; Planelles,Rosa; Artero,Francisco; Domingo-Santos,Juan M.
The restoration of dry lands in the Mediterranean is a challenging task because harsh abiotic conditions hamper the counteraction of feed-back degradation processes. Active restoration through planting must be performed to deter this process. In this study, we tested the influence of mineral nutrition in the nursery (two formulations of controlled release fertilizer at two rates each) and tree protection after planting (by using tube shelters) on the nine-year performance of Acacia salicina irrigated with low-quality (saline) water. The overall survival at the end of the study period was 58.2%, with the electrical conductivity of the soil saturation extract reaching 5.4 dSm-1 after nine years. The survival and growth (in height) were greater for seedlings...
Tipo: Journal article Palavras-chave: Plantation; Restoration; Seedling nutrition; Seedling quality; Tube shelters.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000100007
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Foliar fertilization on the production of grafted dwarf cashew seedlings Ciência e Agrotecnologia
Santos,Ricardo Miranda dos; Serrano,Luiz Augusto Lopes; Taniguchi,Carlos Alberto Kenji; Artur,Adriana Guirado; Natale,William; Corrêa,Márcio Cleber de Medeiros.
ABSTRACT Foliar fertilization is an important agricultural technique that has stood out for its ease of use and can contribute to the production of high-quality and -vigor cashew seedlings. The objective of this study was to evaluate the effect of foliar fertilizer rates and time of application on ‘BRS 226’ dwarf cashew seedlings after grafting. The experiment was carried out in a completely randomized design, with five treatments and 24 replicates. Each experimental unit consisted of one plant. The commercial product (NPK 20-20-20) was used at the recommended rate for fruit crops in general, 2.5 g L-1. Foliar fertilizer applications at 45 and 60 days after grafting (DAG), with 50% of the recommended rate (1.25 g L-1), or at 80 DAG, with 100% of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anacardium occidentale; Total dry matter; Seedling quality; Nutrient contents.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100249
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Frequency of irrigation with saline water in sugar-apple seedlings produced on substrate with polymer AGRIAMBI
Silva,Aldeir R.; Bezerra,Francisco T. C.; Cavalcante,Lourival F.; Pereira,Walter E.; Araújo,Leandro M.; Bezerra,Marlene A. F..
ABSTRACT The objective of this work was to evaluate the growth of sugar-apple seedlings under irrigation management with saline water in a substrate with soil amendment. Treatments were obtained from the arrangement between polymer doses (0, 0.2, 0.6, 1.0 and 1.2 g dm-3) and levels of irrigation water electrical conductivity (0.3, 1.1, 2.7, 4.3 and 5.0 dS m-1), associated with irrigation frequencies (daily and every alternate day), and two additional treatments to evaluate container volume (1.30 and 0.75 dm3), using a randomized complete block design, with four replicates. At 120 days after sowing, the variables substrate salinity, stem diameter, plant height, number of leaves and Dickson quality index were determined. Data were submitted to analyses of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Annona squamosa; Soil amendment; Container volume; Seedling quality.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001200825
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Germination and development of pecan cultivar seedlings by seed stratification PAB
Poletto,Igor; Muniz,Marlove Fátima Brião; Poletto,Tales; Stefenon,Valdir Marcos; Baggiotto,Carine; Ceconi,Denise Ester.
Abstract: The objective of this work was to evaluate the effect of seed stratification on germination rate, germination speed, and initial development of seedlings of six pecan (Carya illinoinensis) cultivars under subtropical climatic conditions in southern Brazil. For stratification, the seeds were placed in boxes with moist sand, in a cold chamber at 4°C, for 90 days. In the fourteenth week after sowing, the emergence speed index, total emergence, plant height, stem diameter, and number of leaves were evaluated. Seed stratification significantly improves the germination potential and morphological traits of the evaluated cultivars.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carya illinoinensis; Dormancy break; Germination; Rootstock; Seedling quality.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015001201232
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Growth of bare root Pinus taeda, L. seedlings cultivated under five densities in nursery Scientia Agricola
Carneiro,José Geraldo de Araújo; Barroso,Deborah Guerra; Soares,Luis Maurício da Silva.
Seedlings compete for nutrients, water and light. The available area for each seedling affects their behavior related to requirements for these resources. This experiment evaluated the influence of five plant densities on the growth of bare root Pinus taeda, L. seedlings in a nursery after outplanting. The analyzed characteristics were: height (H), root collar diameter (D), H/D ratio, and dry matter weight. Higher densities stimulated H growth and the lowest densities increased D average and dry matter weight and lowered the H/D ratio. Seedlings were distributed by H, D and H/D classes. Higher densities had a larger number of seedlings in larger H classes. Larger numbers of seedlings with larger D and lower H/D ratios were found in lower densities. Ten...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Spacing; Erosion; Seedling quality; Morphological characteristics; Root growth.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000100004
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Growth of Leucaena leucocephala (Lam.) de Wit favored by organic waste in the Brazilian semiarid region AGRIAMBI
Amaral,Francisco H. C.; Nóbrega,Júlio C. A.; Nóbrega,Rafaela S. A.; Filho,José F. Lustosa; Amorim,Sarah P. do N..
ABSTRACT The aim of this study was to evaluate the effect of sources and rates of organic waste and their interaction on the growth of Leucaena leucocephala (Lam.) de Wit, in the Southeast region of Piauí State. The treatments consisted of two sources (Copernicia prunifera (Mill.) H.E. palm residue and plant compound) and six organic waste rates. The study was conducted in the period of March-June 2011 and the following parameters were evaluated: stem diameter, height, number of leaves, shoot dry weight, root dry weight, total dry matter, root volume, shoot dry weight/root dry weight ratio, height/stem diameter ratio and the Dickson Quality Index. The Copernicia prunifera (Mill.) H.E. palm residue and plant compound showed a great potential to be used in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Substrates; Seedling quality; Recovery of degraded áreas.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000700612
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Seed conditioning of red oak: a recalcitrant North American seed Scientia Agricola
Struve,D.K..
A ten day aerated water soak was developed as a seed conditioning treatment for red oak (Quercus rubra L.). Conditioned seeds had higher germination completeness, uniformity and speed compared to control seeds. Seeds could be conditioned under a wide range of temperatures and durations. Conditioned seeds were maintained at 7(0)C for 30 days without loss of seed quality. During conditioning, pericarps split in response to seed hydration. Split pericarps could be used as a pre-sowing indicator for high quality seeds. Seed conditioning was ineffective on dormant seeds. Increased crop uniformity and higher stand establishment can be realized by subjecting red oak acorns to an aerated water soak treatment followed by selecting seeds with split pericarps. These...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Quercus rubra; Acorns; Stratification; Aerated water soak; Germination capacity; Seed storage; Seedling quality.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161998000500012
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Solid urban waste in the production of Aegiphila sellowiana Cham. seedlings AGRIAMBI
Caldeira,Marcos V. W.; Santos,Fernando E. V.; Kunz,Sustanis H.; Klippel,Valéria H.; Delarmelina,William M.; Gonçalves,Elzimar de O..
ABSTRACT The use of organic wastes as primary source of nutrients can contribute to reducing the dependence on inputs, besides being a sustainable destination for these materials. This study aimed to evaluate the quality of Aegiphila sellowiana seedlings grown in substrates composed of different proportions of sewage sludge, organic wastes and vermiculite. Twenty six substrates (treatments) were tested, formulated from the mixture of sewage sludge with vermiculite and the wastes coconut fiber, fresh coffee straw, organic compost (fresh bovine manure and fresh coffee straw), carbonized rice husk and fresh rice husk, at the proportions of 100:0, 80:20, 60:40, 40:60 and 20:80 (sewage sludge:materials), and a control, composed of commercial substrate...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lamiaceae; Sewage sludge; Substrate; Seedling quality; Seedling nutrition.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001200831
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Sustratos alternativos para la producción de Pinus greggii Engelm en vivero Colegio de Postgraduados
Maldonado Benítez, Karla Reyna.
El objetivo principal en la investigación del concepto de calidad de planta es determinar qué características estructurales y fisiológicas deben presentar las plántulas en vivero, por lo cual existen subproductos de la industria maderera útiles como sustratos para producir plantas en vivero; así como sustancias acondicionadoras para mejorar la humedad disponible a la planta. Por esta razón se evaluó el efecto de un polímero sintético en mezclas de sustrato alternativo con cuatro niveles de riego para la producción de Pinus greggii Engelm. en vivero. Se utilizó un diseño de parcelas divididas con un tratamiento adicional, donde se estudiaron 10 mezclas de sustrato compuestas por aserrín, corteza de pino, turba, agrolita y vermiculita. A los 5 meses después...
Palavras-chave: Calidad de planta; Mezclas de sustrato; Polímero; Prácticas culturales; Seedling quality; Substrate mixtures; Polymeric; Cultural practices; Maestría; Forestal; Pinus greggii.
Ano: 2010 URL: http://hdl.handle.net/10521/79
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Sustratos alternativos para la producción de Pinus greggii Engelm en vivero Colegio de Postgraduados
Maldonado Benítez, Karla Reyna.
El objetivo principal en la investigación del concepto de calidad de planta es determinar qué características estructurales y fisiológicas deben presentar las plántulas en vivero, por lo cual existen subproductos de la industria maderera útiles como sustratos para producir plantas en vivero; así como sustancias acondicionadoras para mejorar la humedad disponible a la planta. Por esta razón se evaluó el efecto de un polímero sintético en mezclas de sustrato alternativo con cuatro niveles de riego para la producción de Pinus greggii Engelm. en vivero. Se utilizó un diseño de parcelas divididas con un tratamiento adicional, donde se estudiaron 10 mezclas de sustrato compuestas por aserrín, corteza de pino, turba, agrolita y vermiculita. A los 5 meses después...
Palavras-chave: Calidad de planta; Mezclas de sustrato; Polímero; Prácticas culturales; Seedling quality; Substrate mixtures; Polymeric; Cultural practices; Maestría; Forestal; Pinus greggii.
Ano: 2010 URL: http://hdl.handle.net/10521/79
Registros recuperados: 14
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