Consulta: creatorFacets:"Freitas,Rômulo M. O. de"
Registros recuperados: 8
Data/hora: 12/06/2024 13:21:30

Production of Piptadenia stipulacea (Benth.) Ducke seedlings irrigated with fish farming wastewater
Provedor de dados: 91
Autores: Almeida,João P. N. de; Freitas,Rômulo M. O. de; Nogueira,Narjara W.; Oliveira,Francisco de A. de; Ferreira,Hugo; Leite,Moadir de S.
ABSTRACT The objective of this study was to evaluate the growth of ‘jurema-branca’ seedlings (Piptadenia stipulacea (Benth.) Ducke.), irrigated with effluent from fish farming in order to meet the nutritional demand in the initial growth stage. The treatments consisted in the dilution of fish farming wastewater in different concentrations (0, 25, 50, 75 and 100%) with supply water. Seeds were sown in 0.9-L polyethylene bag containing a mixture of soil and manure. At 54 days after sowing the shoot length, stem diameter, height/diameter ratio, number of leaves, leaf area, unit leaf area, dry matter of stem, leaves, shoots, roots and total, chlorophyll content index and Dickson quality index were evaluated. The growth of ‘jurema-branca’ seedlings is favored...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: ‘jurema-branca’; Water reuse; Propagation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000600386

Water use of cowpea under deficit irrigation and cultivation systems in semi-arid region
Provedor de dados: 91
Autores: Freitas,Rômulo M. O. de; Dombroski,Jeferson L. D.; Freitas,Francisco C. L. de; Nogueira,Narjara W.; Leite,Tiago S.; Praxedes,Sidney C.
ABSTRACT The resilience of crops to drought depends heavily on the cultural practices adopted, which can have a direct effect on water use efficiency. The aim of this study was to assess the influence of irrigation intervals on the growth, water consumption and water use efficiency of cowpea crops (cv. BRS Guariba) under conventional and no-tillage systems. The experiment was carried out in the semi-arid region of Rio Grande do Norte, Brazil, using a split-plot in a randomised complete block design, with four replications. Treatments consisted of two cultivation systems in the whole plots (conventional and no-tillage) and six irrigation intervals in the subplots (2, 6, 10, 14, 18 and 22 days) which were applied at full bloom. The biomass of the different...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vigna unguiculata; No-tillage; Mulch; Water deficit.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000400271

Light intensity and type of container on producing Cassia grandis L. f. seedlings
Provedor de dados: 91
Autores: Leal,Caio C. P.; Torres,Salvador B.; Freitas,Rômulo M. O. de; Nogueira,Narjara W.; Farias,Raul M. de.
ABSTRACTThis study aimed to determine the effects of the luminosity and type of container on producing Cassia grandis seedlings. Thus, in a substrate composed by topsoil + wood powder (1:1) the seedlings were grown into plastic tubets containing 0.3 dm3 of such substrate, or into plastic pots containing 1.0 dm3 of the same substrate, and subjected to 50 and 25% shading or full sunlight. The assessments were performed every two weeks by measuring plant height and stem diameter, during eight weeks period. At the end of this period, the leaf area, dry mass of shoots and roots, the ratio between height of plant/diameter of stem, and the Dickson quality index were also assessed. The experiment was carried out in a completely randomized design with treatments...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pink shower cassia; Forest species; Forest species seeds; Seedling growth; Shading.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001000939

Growth of young Tabebuia aurea seedlings under irrigation with wastewater from fish farming
Provedor de dados: 91
Autores: Pinto,José R. de S.; Freitas,Rômulo M. O. de; Leite,Tiago de S.; Oliveira,Francisco de A. de; Ferreira,Hugo; Leite,Moadir de S.
ABSTRACT This study aimed to evaluate the growth of young Tabebuia aurea seedlings irrigated with different concentrations of wastewater from fish farming. The experiment was conducted in a seedling nursery, from June to August 2013. The treatments consisted of five concentrations of wastewater from fish farming diluted in freshwater (0, 25, 50, 75 and 100% of wastewater). Plant height, stem diameter and plant height/stem diameter ratio were evaluated every 15 days to verify the effects of treatments on seedlings growth. At the end of the experiment, individual leaf area, leaf area, leaf dry matter, stem dry matter, root dry matter, total dry matter and Dickson quality index were also evaluated. The reuse of wastewater from fish farming diluted at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water reuse; Seedling production; Salinization; Reforestation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000600519

‘Jurema-de-embira’ seed germination under water stress and at different temperatures
Provedor de dados: 91
Autores: Nogueira,Narjara W.; Torres,Salvador B.; Freitas,Rômulo M. O. de; Castro,Thiago H. da S.; Sá,Francisco V. da S.
ABSTRACT The process of water imbibition by the seed depends on temperature and water availability, which according to the absorbed water retention capacity will determine the success of the germination process. Thus, this study aimed to investigate the effects of water stress on the germination and vigor of ‘jurema-de-embira’ seeds under different temperatures. The experimental design was completely randomized in a 7 x 4 factorial scheme (osmotic potential and temperature) with four replicates of 25 seeds each. The osmotic potentials of 0, -0.1, -0.2, -0.3, -0.4, -0.5 and -0.6 MPa at temperatures of 25, 30 and 35 °C and alternated of 20-30 °C, under photoperiod of 8 h, were evaluated. Germination percentage, germination speed index, shoot and root length,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mimosa ophthalmocentra Mart. ex; Benth; Fabaceae; Forest species; Caatinga; Osmotic potentials.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000400244

Emergência e crescimento inicial de plântulas de albízia submetidas à irrigação com água salina
Provedor de dados: 91
Autores: Lima,Mayky F. P. de; Porto,Maria A. F.; Torres,Salvador B.; Freitas,Rômulo M. O. de; Nogueira,Narjara W.; Carvalho,Donato R. de.
Objetivou-se, com este trabalho, avaliar o efeito de diferentes concentrações de sais na água de irrigação sob a emergência e o crescimento inicial de plântulas de albízia (Albizia lebbeck (L.) Benth.). O experimento foi desenvolvido em casa de vegetação do departamento de Ciências Vegetais da Universidade Federal Rural do Semiárido, Mossoró, RN, usando-se o delineamento inteiramente casualizado, com seis tratamentos e quatro repetições, com 24 sementes em cada parcela. Os tratamentos foram constituídos das concentrações salinas 0,68 (água de abastecimento); 1,5; 3,0; 4,5; 6,0 e 7,5 dS m-1, obtidas através da adição de NaCl em água. As variáveis avaliadas foram: porcentagem de emergência de plântulas, índice de velocidade de emergência, comprimento da...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Albizia lebbeck; Estresse salino; Tolerância; Desenvolvimento.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000200106

Germination and initial development of Simira gardneriana seedling under water stress and at different temperatures
Provedor de dados: 91
Autores: Oliveira,Fabrícia N. de; Oliveira,Jessica R. de; Torres,Salvador B.; Freitas,Rômulo M. O. de; Nogueira,Narjara W.
ABSTRACT The germination of seeds is affected by many factors, including water availability and temperature. This study aimed to evaluate the effects of water stress and different temperatures on germination and initial development of S. gardneriana M. R. Barbosa &amp; Peixoto seedlings. The experiment was carried out in a completely randomized design, in a 7 x 4 factorial scheme, with seven potentials (0; -0.1; -0.2; -0.3; -0.4; -0.5 and - 0.6 MPa) and four temperatures (25, 30, 35 and 20-30 °C), with four replicates of 25 seeds. The analyzed variables were germination, percentage of normal seedlings, germination speed index, seedling length (shoot and root) and dry weight (shoot and root). There is a decrease in the germination and vigor of the seeds as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rubiaceae; Caatinga; Osmotic potential; Forest species.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000500333

Salt stress and temperatures on the germination and initial growth of ‘jurema-de-embira’ (Mimosa ophthalmocentra) seedlings
Provedor de dados: 91
Autores: Nogueira,Narjara W.; Torres,Salvador B.; Freitas,Rômulo M. O. de; Santos,Paulo C. da S.; Sá,Francisco V. da S.; Leite,Moadir de S.
ABSTRACT The objective of this study was to evaluate the effects of salinity on the germination and initial growth of ‘jurema-de-embira’ (Mimosa ophthalmocentra) seedlings at different temperatures. The experiment was installed in a completely randomized design, in a factorial scheme of eight salt concentrations (0; 4.0; 8.0; 12.0; 16.0; 20.0; 24.0 and 28.0 dS m-1) and four temperatures (25, 30, 35 and 20-30 °C) in four replicates of 25 seeds under an 8-h photoperiod in Biochemical Oxygen Demand germinators. The variables analyzed were: germination, germination speed index, shoot and root lengths, and shoot, root and total dry matter. Temperature variation influences the response of ‘jurema-de-embira’ seeds to salinity, and the salt stress is intensified...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fabaceae; Forest species; Caatinga; Salinity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000400273