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| Registros recuperados: 77 | |
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| Oliveira, Rosa Honorato de; Universidade FederalRural dePernambuco, Unidade Acadêmica de Serra Talhada; Souza, Myrne Jamilly de Lima; UESB; Morais, Otoniel Magalhães; UESB; Guimarães, Bruno Vinicius Castro; UESB; Pereira Júnior, Hercílio de Assis; UESB. |
| O objetivo deste trabalho foi verificar os efeitos da aplicação de micronutrientes sobre a germinação e o vigor de sementes de mamona, especificamente a cultivar BRS 149 Nordestina. Utilizou-se o delineamento experimental inteiramente casualizado, com quatro repetições de 25 sementes. Os tratamentos constaram da testemunha, imersão em H2O, imersão em B, imersão em Zn, imersão em Cu, imersão em Mn, imersão em Mo e imersão em Fe. Por meio dos resultados obtidos, evidencia-se incremento na germinação e no vigor com a aplicação de micronutrientes às sementes de mamona. O B influenciou negativamente a germinação e o vigor e aumentou a porcentagem de sementes duras e dormentes. |
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Palavras-chave: 5.01.00.00-9 e 5.01.03.00-8 Ricinnus communis L.; Germinação; Sementes; Vigor; Plântulas; Nutrientes Fertilidade do Solo e Adubação Ricinus communis L.; Germination; Seeds; Vigor; Seedlings; Nutrients. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4829 |
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| Ribeiro, João Everthon da Silva; Leite, Arliston Pereira; Nóbrega, Jackson Silva; Alves, Edna Ursulino; Bruno, Riselane de Lucena Alcântara; Albuquerque, Manoel Bandeira de. |
| Erythroxylum pauferrense is an endemic understory plant species of the Northeast Region of Brazil. The species is of great importance to the region and so ecophysiological studies are needed for its preservation. The objective of the present study was to determine the best substrates and temperatures for testing germination and seed vigor of E. pauferrense. An experiment was performed comprising a completely randomized design in a 5 x 4 factorial scheme, with five temperature regimes (20, 25, 30, 35°C constant and 20-30°C alternating) and four types of substrates (paper, vermiculite, sand and commercial substrate). The following characteristics were evaluated: germination percentage, first germination count, germination speed index, mean germination time,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Guarda-orvalho; Erythroxylaceae; Forest seeds; Ecophysiology; Seedlings; Atlantic forest.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/46030 |
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| Fadel, Moustafa Amin. |
| This research paper focuses on investigating the effect of using various substrate materials on the development of seedlings for ornamental plants. Bermuda grass (Cynodon dactylon), Petunia (Compacta Enana Rosa) and Epipremnum aureum, Bermuda; Petunia and Epipremnum aureum were cultivated in different substrates. Synthetic sponge (Polyurethane sponge), Rockwool and sterilized cotton were used as the substrate materials in each case where an experimental water-circulating apparatus was designed and installed to execute the test. Results showed that after 15 days, Bermuda grass in Rockwool reached a germination rate of 70% while it did not exceed 50% in sponge or in medically treated cotton. The highest germination rate after 20 days for Petunia was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hydroponics hydroponics; Germination; Seedlings; Cuttings. |
| Ano: 2017 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3851 |
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| MASETTO,TATHIANA E.; FARIA,JOSE M.; FRAIZ,ANA C.R.. |
| This work aimed to characterize the re-induction of desiccation tolerance (DT) in germinated seeds, using polyethylene glycol (PEG 8000). Cell changes were investigated through cytological assays (cell viability and transmission electronic microscopy) as well as DNA integrity during loss and re-establishment of DT. The loss of DT was characterized by drying germinated seeds with different radicle lengths (1, 2, 3, 4 and 5 mm) in silica gel, decreasing the moisture content to ten percentage points intervals, followed by pre-humidification (100% RH / 24 h) and rehydration. To re-induce DT, germinated seeds were treated for 72 h with PEG (-2.04 MPa) and PEG (-2.04 MPa) + ABA (100 µM) before dehydration. Germinated seeds did not tolerate desiccation to 10%... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cytological alterations; DNA integrity; Seedlings; Moisture content. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301273 |
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| RAMOS,LUIS CARLOS DA SILVA; CARVALHO,ALCIDES. |
| Roots and shoots from seedlings of 29 coffee genotypes were studied to better characterize the entries from the Coffea germplasm bank of the Instituto Agronômico (IAC), Campinas, State of São Paulo, Brasil. The varieties were seeded in a randomized complete block design with 6 replications and 10 plants per plot. The characters evaluated were: plant (PL), shoot (SL) and root (RL) length; total plant (PDM), shoot (SDM), root (RDM) and lateral root (LRDM) dry matter. A lateral root index (LRI) and shoot root dry matter (SRDM = SDM/RDM) and length ratios; (SRL = SL/RL) were calculated. The dwarf varieties (Catuaí, Icatu-caturra, Vila Sarchi, San Ramon, Vila Lobos, São Bernardo) presented higher LRDM and lower SDM than the normal size varieties such as Mundo... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea; Coffee; Varieties; Seedlings; Shoots; Roots; Coffea. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051997000100006 |
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| Ding,Chang-hong; Wang,Qian-Bo; Guo,Shenglei; Wang,Zhen-yue. |
| Abstract Aspergillus sp., Fusarium sp., and Ramularia sp. were endophytic fungi isolated from Rumex gmelini Turcz (RGT), all of these three strains could produce some similar bioactive secondary metabolites of their host. However the ability to produce active components degraded significantly after cultured these fungi alone for a long time, and were difficult to recover. In order to obtain more bioactive secondary metabolites, the co-culture of tissue culture seedlings of RGT and its endophytic fungi were established respectively, and RGT seedling was selected as producer. Among these fungi, Aspergillus sp. showed the most significant enhancement on bioactive components accumulation in RGT seedlings. When inoculated Aspergillus sp. spores into media of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rumex gmelini Turcz (RGT); Endophytic fungi; Aspergillus sp.; Seedlings; Bioactive secondary metabolites. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000200362 |
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| Díaz Serrano, Fidel René. |
| Con el objetivo de utilizar la paja de trigo como sustrato en el crecimiento de plántulas de brócoli se hicieron varios experimentos. En el primero se evaluaron 3 sustratos de paja de trigo con extracción de fenólicos con agua común. Las plántulas de brócoli presentaron porcentajes de inhibición entre 54.92 y 57.40 % en la parte aérea y entre 38.31 y 44.78 % en raíces con respecto al testigo. En el segundo se identificaron por cromatografía de capa fina y se cuantificaron por cromatografía líquida de alta resolución los ácidos p-cumárico y ferúlico como probables compuestos inhibidores del crecimiento. Los porcentajes de recuperación de estos ácidos fueron muy bajos con respecto a la concentración de fenólicos solubles totales (CFST) cuantificados por... |
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Palavras-chave: Paja de trigo; Sustratos; Fenólicos; Plántulas; Brócoli; Wheat straw; Substrates; Phenolics; Seedlings; Broccoli; Doctorado; Edafología. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/497 |
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| Díaz Serrano, Fidel René. |
| Con el objetivo de utilizar la paja de trigo como sustrato en el crecimiento de plántulas de brócoli se hicieron varios experimentos. En el primero se evaluaron 3 sustratos de paja de trigo con extracción de fenólicos con agua común. Las plántulas de brócoli presentaron porcentajes de inhibición entre 54.92 y 57.40 % en la parte aérea y entre 38.31 y 44.78 % en raíces con respecto al testigo. En el segundo se identificaron por cromatografía de capa fina y se cuantificaron por cromatografía líquida de alta resolución los ácidos p-cumárico y ferúlico como probables compuestos inhibidores del crecimiento. Los porcentajes de recuperación de estos ácidos fueron muy bajos con respecto a la concentración de fenólicos solubles totales (CFST) cuantificados por... |
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Palavras-chave: Paja de trigo; Sustratos; Fenólicos; Plántulas; Brócoli; Wheat straw; Substrates; Phenolics; Seedlings; Broccoli; Doctorado; Edafología. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/497 |
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| Salaya Domínguez, Jotam. |
| Con el objetivo de evaluar el efecto de dos abonos líquidos fermentados elaborados de subproductos regionales, en la producción de plántulas de chile habanero (Capsicum chinense Jacq), en la fase de vivero; se estableció el experimento en un predio del poblado C-34, Plan Chontalpa, Huimanguillo, Tabasco. Para la obtención de los abonos líquidos fermentados se utilizó el biodigestor tipo estacionario o Batch, a los cuales se les hizo las adecuaciones en la tapa que funcionó como válvula de escape, para la liberación de los gases generados durante la fermentación. Se utilizaron dos abonos, uno con biomasa de estiércol fresco de bovino (Biol Eb) y otro con follaje fresco de Gliricidia sepium (Jacq) (Biol Gs). Se realizaron tres repeticiones para determinar el... |
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Palavras-chave: Biodigestor; Biomasa; Efluentes; Biol; Plántulas; Biomass; Waste; Seedlings; Maestría; Producción Agroalimentaria en el Trópico. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/235 |
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| Salaya Domínguez, Jotam. |
| Con el objetivo de evaluar el efecto de dos abonos líquidos fermentados elaborados de subproductos regionales, en la producción de plántulas de chile habanero (Capsicum chinense Jacq), en la fase de vivero; se estableció el experimento en un predio del poblado C-34, Plan Chontalpa, Huimanguillo, Tabasco. Para la obtención de los abonos líquidos fermentados se utilizó el biodigestor tipo estacionario o Batch, a los cuales se les hizo las adecuaciones en la tapa que funcionó como válvula de escape, para la liberación de los gases generados durante la fermentación. Se utilizaron dos abonos, uno con biomasa de estiércol fresco de bovino (Biol Eb) y otro con follaje fresco de Gliricidia sepium (Jacq) (Biol Gs). Se realizaron tres repeticiones para determinar el... |
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Palavras-chave: Biodigestor; Biomasa; Efluentes; Biol; Plántulas; Biomass; Waste; Seedlings; Maestría; Producción Agroalimentaria en el Trópico. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/235 |
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| Lima,Luiz A.; Almeida,Willian F. de; Lima,Pedro L. T.; Oliveira,Eduardo C.; Shock,Clinton C.. |
| Two experiments were conducted to evaluate the effect of salinity on early physic nut plant development. In the first trial, physic nut seeds were exposed to seven levels of salinity (0, 2, 4, 6, 8, 10 and 12dS m-1) with eight repetitions, using a substrate of paper soaked with solutions of CaCl2 and KCl. The treatments were evaluated based on the initial germination, total percentage of germination, and time necessary to germination of 50% of the seeds. Increased salinity reduced the first germination count and delayed the time to 50% germination. From 10dS m-1, there was a reduction in germination percentage. The second trial evaluated the effect of salinity on the growth of physic nut seeds. This trial, carried out inside a greenhouse, with a completely... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Jatropha curcas L.; Seeds; Seedlings; Greenhouse. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000600004 |
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| Cavalcanti,Sávio D. L.; Pandorfi,Héliton; Guiselini,Cristiane; Menezes,Dimas; Neto,Luiz A. de A.. |
| ABSTRACT This research was carried out in Recife, PE, Brazil, and aimed to assess the variation of the surface temperature of trays and substrate in the production of lettuce seedlings and its influence on the final product. Trays consisted of expanded polystyrene, conventional polyvinyl chloride, polyvinyl chloride painted white, and polyvinyl chloride painted gray. Two cultivars (Solaris and Vanda) were used to register crop biometric variables from seedling stage to the final product (46 days). Tray and substrate temperatures were recorded by means of an infrared thermal imager. The experimental design was a completely randomized design in a 4 × 2 factorial scheme with three replications. The conventional polyvinyl chloride tray presented the highest... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ambience; Protected cultivation; Lactuca sativa L.; Seedlings. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000100041 |
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| Lima,Tiago JL; Gazaffi,Rodrigo; Ceccherini,Guilherme J; Marchi,Luana; Martinez,Marcela; Ferreira,Camila G; Sala,Fernando C. |
| ABSTRACT Lettuce seedlings used on hydroponic cultivation (NFT) are usually produced in trays with small volume, requiring two transplants: from tray to nursery and then to the definitive place. The aim of this study was to verify lettuce performance under NFT system, using seedlings produced in trays with several cell volumes (50, 40, 35, 31, 30, 29, 27, 20 and 10 cm³ cell-1). The tray volumes are considered treatments. The experimental design was completely randomized blocks, with four replicates. Seedlings were transplanted directly to the definitive profile, except those ones produced in 10 cm³ cell-1. Two harvests were performed, at 22 and 29 days after transplant (DAT). We evaluated number of senescent leaves, total number of leaves, shoot fresh... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca sativa; Seedlings; Tray; Soilless cultivation; Hidroponic. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000300408 |
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| Registros recuperados: 77 | |
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