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| Santos,Nádia Souza dos; Alves,José Maria Arcanjo; Uchôa,Sandra Catia Pereira; Oliveira,Natália Trajano de; Albuquerque,José de Anchieta Alves de. |
| A field experiment was carried out in 2010-2011 crop years in the experimental area of the Centro de Ciências Agrárias of the Universidade Federal de Roraima, in Boa Vista, Roraima, Brazil. This study aimed to evaluate the effect of nitrogen availability on the concentrations of N, P, K, Ca, Mg and S in cassava, cultivar Aciolina, in different harvest times. A randomized block design was used in split-plot, with four replications. Dosages of N in cover were applied randomly on the plots (0, 30, 60, 150 and 330 kg ha-1), and in the subplot the harvest dates 120, 150, 180, 210, 240, 270 and 300 days after emergence (DAE). The vegetal material was collected, ground and then underwent an analysis for determination of nutrients concentrations in the leaves (N,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertilisation; Manihot esculenta; Plants-Nutrition; Plants-Nitrogen effect. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000400001 |
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| Oliveira,Natália Trajano de; Uchôa,Sandra Cátia Pereira; Alves,José Maria Arcanjo; Sediyama,Tocio; Albuquerque,José de Anchieta Alves de; Souza,Everton Diel; Melville,Cirano Cruz. |
| O objetivo deste trabalho foi avaliar o teor de ácido cianídrico em tecidos de mandioca, em função da idade da planta e níveis de adubação nitrogenada. Utilizou-se o delineamento experimental de blocos ao acaso, em arranjo de parcelas subdivididas, com quatro repetições. As doses de nitrogênio em cobertura (0, 30, 60, 150 e 330 kg ha-1) foram alocadas nas parcelas, e as épocas de avaliação (90, 120, 150, 180, 240, 300 e 360 dias após o plantio), nas subparcelas. Os teores de ácido cianídrico foram avaliados em tecidos da folha, caule, polpa e córtex da raiz da cultivar Aciolina. Os efeitos das doses de N e das épocas de avaliação foram independentes. Doses entre 219 e 241 kg ha-1 de N em cobertura proporcionam os maiores teores de ácido cianídrico, que... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Glicosídeos cianogênicos; Linamarina; Lotaustralina. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012001000004 |
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| Oliveira,Natália Trajano de; Uchôa,Sandra Catia Pereira; Alves,José Maria Arcanjo; Albuquerque,José de Anchieta Alves de; Rodrigues,Guilherme Silva. |
| ABSTRACT Nitrogen is considered the most limiting nutrient for cassava, and N availability can influence the crop cycle, including earlier harvest. The aim of this study was to study the effect of harvest time on the production components of cassava, “Aciolina” cultivar, at different rates of N fertiliser. The experiment was carried out in an area newly incorporated into the productive system in a savannah ecosystem in the northern Amazon. A randomised block experimental design was used in a split plot arrangement with four replications. The N rates (0, 30, 60, 150, and 330 kg ha-1) were allocated to the main plots, and the harvest times (90, 120, 150, 180, 240, 300, and 360 days after emergence of the stalks - DAE) were allocated to the subplots. Plant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Cassava; Crop cycle; Nitrogen fertiliser; Amazonian savannah. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100519 |
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| Monteiro Neto,João Luiz Lopes; Araújo,Wellington Farias; Oliveira Vilarinho,Lucianne Braga; de Oliveira Nunes,Taline Katlen; da Silva,Edgley Soares; da Silva Maia,Sonicley; Albuquerque,José de Anchieta Alves de; Alves Chagas,Edvan; da Silva Siqueira,Raphael Henrique; Abanto-Rodriguez,Carlos. |
| Abstract The type of environment and substrates quality in seedlings production are essential for the production of productive plants under field conditions. In order to determine the best environment and substrate for seedlings production of two tomato cultivars (IPA 06 and Santamélia), two experiments, completely randomized and arranged in subdivided plots with five replicates, were conducted under the environmental conditions of Boa Vista, Roraima, Brazil. Treatments consisted of the association among five environments (A1 - greenhouse, A2 - Chromatinet ® 35% red, A3 - Chromatinet ® 50% red, A4 - Chromatinet ® 35% Silver and A5 - Chromatinet ® 50% Silver) and four substrates S1 - OrganoAmazon®; S2 -OrganoAmazon® + PuroHumus®; S3 - OrganoAmazon® +... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Horticulture; Photoconverter shading nets; Plant propagation; Plant establishment; Protected environment; Transplanting. |
| Ano: 2018 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000200270 |
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