Consulta: creatorFacets:"Alvarez,Rita de Cássia Félix"
Registros recuperados: 8
Data/hora: 02/06/2024 00:44:42

Gas exchange rates, plant height, yield components, and productivity of upland rice as affected by plant regulators
Provedor de dados: 86
Autores: Alvarez,Rita de Cássia Félix; Crusciol,Carlos Alexandre Costa; Nascente,Adriano Stephan; Rodrigues,João Domingos; Habermann,Gustavo.
The objective of this work was to evaluate gas exchange rates, plant height, yield components, and productivity of upland rice, as affected by type and application time of plant growth regulators. A randomized block design, in a 4x2 factorial arrangement, with four replicates was used. Treatments consisted of three growth regulators (mepiquat chloride, trinexapac-ethyl, and paclobutrazol), besides a control treatment applied at two different phenological stages: early tillering or panicle primordial differentiation. The experiment was performed under sprinkler-irrigated field conditions. Net CO2 assimilation, stomatal conductance, plant transpiration, and water-use efficiency were measured four times in Primavera upland rice cultivar, between booting and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; Net photosynthesis; Stomatal conductance; Transpiration; Water-use efficiency.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012001000007

Micronutrient and Silicon Uptake and Removal by Upland Rice Cultivars with Different Plant Architecture
Provedor de dados: 90
Autores: Crusciol,Carlos Alexandre Costa; Carmeis Filho,Antonio Carlos de Almeida; Fernandes,Adalton Mazetti; Alvarez,Rita de Cássia Félix.
ABSTRACT Upland rice cultivars manifest different nutritional demands. A field study was conducted to quantify the extraction, distribution, and removal of micronutrients and silicon by the upland rice cultivars. The experiment was arranged in a randomized complete block-split plot design. Plots consisted of three cultivars (Caiapó – traditional, BRS Primavera – intermediate, and Maravilha – modern) of upland rice. Split-plots consisted of plant samplings, which occurred at 39, 46, 55, 67, 75, 83, 92, 102, 111, 118, and 125 days after emergence (DAE). Up to the end of tillering (46 DAE), all cultivars exhibited low demand for most micronutrients and Si, and took up less than 24 % of the total B, Cu, and Si, but around 31 % of the total Zn. The period of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; Nutrient accumulation; Uptake rates; Nutritional requirement.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100522

Influência do etil-trinexapac no acúmulo, na distribuição de nitrogênio (15N) e na massa de grãos de arroz de terras altas
Provedor de dados: 90
Autores: Alvarez,Rita de Cássia Félix; Crusciol,Carlos Alexandre Costa; Trivelin,Paulo Cesar Ocheuze; Rodrigues,João Domingos; Alvarez,Angela Cristina Camarim.
A garantia de alta produtividade de grãos de arroz no sistema de cultivo irrigado por aspersão tem estimulado a utilização de maiores doses de fertilizantes, principalmente os nitrogenados. Contudo, o manejo inadequado da adubação nitrogenada pode resultar em acamamento das plantas. A aplicação de reguladores vegetais pode carrear fotoassimilados para produção de grãos em detrimento do crescimento vegetativo excessivo. Este trabalho teve por objetivos: avaliar a influência do regulador de crescimento etil-trinexapac nas características de crescimento da planta e no acúmulo e distribuição de N (15N) nas partes e na planta inteira de arroz; e verificar a contribuição do N absorvido em diferentes estádios de desenvolvimento na formação da panícula, nos...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa L.; Regulador de crescimento vegetal; Acúmulo de massa seca; Altura de planta.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832007000600025

Macronutrient Uptake and Removal by Upland Rice Cultivars with Different Plant Architecture
Provedor de dados: 90
Autores: Crusciol,Carlos Alexandre Costa; Fernandes,Adalton Mazetti; Carmeis Filho,Antonio Carlos de Almeida; Alvarez,Rita de Cássia Félix.
ABSTRACT Modern high-yielding rice cultivars possibly take up and remove greater quantities of macronutrients than traditional and intermediate cultivars. This study was carried out with the aim of evaluating the extraction and removal of macronutrients by upland rice cultivars. These information are of utmost importance for the correct fertilizer management. The treatments consisted of three upland rice cultivars (Caiapó, a traditional type; BRS Primavera, an intermediate type; and Maravilha, a modern type). Macronutrient accumulation by rice cultivars up to the end of tillering (46 DAE) accounted for only 25 % of the total N and P, and between 35-45 % of the total K, Ca, Mg, and S; after that time, accumulation was intensified. In all of the cultivars,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; Mineral nutrition; Uptake rates; Nutritional efficiency.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100521

Adaptability and stability of erect cowpea genotypes via REML/BLUP and GGE Biplot
Provedor de dados: 53
Autores: Santos,Adriano dos; Ceccon,Gessi; Teodoro,Paulo Eduardo; Correa,Agenor Martinho; Alvarez,Rita de Cássia Félix; Silva,Juslei Figueiredo da; Alves,Valdecir Batista.
ABSTRACT The objective of this study was to investigate the association between the GGE Biplot and REML/BLUP methods and select cowpea genotypes that meet simultaneously high grain yield, adaptability and stability in the Mato Grosso do Sul environments. The experiments were carried out from February to July 2010, 2011 and 2012 in the municipalities of Dourados, Aquidauana and Chapadão do Sul. The experiments in Chapadão do Sul were conducted only in the years of 2010 and 2011, totaling eight environments. After detecting significant genotypes × environments (GE) interaction, the adaptability and the phenotypic stability of cowpea genotypes were analyzed by GGE Biplot and REML/BLUP methods. These methods were concordant in the identification of the best...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vigna unguiculata; Multivariate analysis; Mixed models; Genotypes × environments interaction.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000300299

Leaf gas exchange and yield of three upland rice cultivars
Provedor de dados: 53
Autores: Alvarez,Rita de Cássia Félix; Habermann,Gustavo; Crusciol,Carlos Alexandre Costa; Nascente,Adriano Stephan; Rodrigues,João Domingos.
Studies of physiological parameters associated with crop performance and growth in different groups of upland rice (Oryza sativa L.) may support plant breeding programs. We evaluated the role of gas exchange rates and dry matter accumulation (DMA) as traits responsible for yields in a traditional (cv. ‘Caiapó’), intermediate (cv. ‘Primavera’) and modern (cv. ‘Maravilha’) upland rice cultivars. Leaf gas exchange rates, DMA, leaf area index (LAI), harvest indexes (HI) and yield components were measured on these genotypes in the field, under sprinkler irrigation. Panicles per m2 and DMA at flowering (FL) and heading, as well as CO2 assimilation rates (A) were similar across these cultivars. The highest yield was found in ‘Primavera’, which may be explained by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; Net photosynthesis; Harvest index; Dry matter accumulation rates; Crop growth rate.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000100001

Rooting of healthy and CVC-affected 'Valência' sweet orange stem cuttings, through the use of plant regulators
Provedor de dados: 52
Autores: Habermann,Gustavo; Alvarez,Rita de Cássia Félix; Modesto,Júnior Cesar; Fortes,Andréa Maria Teixeira; Rodrigues,João Domingos; Ono,Elizabeth Orika.
Citrus variegated chlorosis (CVC) is a disease caused by Xylella fastidiosa. Using different concentrations of plant regulators, such as auxins (indole-3-butyric acid) and gibberellic acid biosynthesis-inhibitor (paclobutrazol), physiological rooting capacity of healthy and CVC-affected stem cuttings were evaluated in order to investigate the importance of plant hormone imbalance and xylem occlusion in plants with CVC. The percentages of dead, alive and rooted cuttings, cuttings with callus and mean number of roots per cuttings did not show statistical differences in response to the distinct concentrations of synthetic plant regulators. There were differences only between healthy and CVC-affected cuttings. This showed the importance of xylem occlusion and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: IBA; Paclobutrazol; Xylella fastidiosa; Root initiation; Citrus sinensis.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000100004

Aspectos da biologia reprodutiva de Jatropha curcas L
Provedor de dados: 64
Autores: Paiva Neto,Vespasiano Borges de; Brenha,Jeruska Azevedo Moreira; Freitas,Felipe Barbosa de; Zuffo,Mônica Cristina Rezende; Alvarez,Rita de Cássia Félix.
O conhecimento da estrutura floral e da biologia reprodutiva numa cultura é básico para que o melhorista desenvolva técnicas de castração e polinização adequadas. Objetivando obter dados de biologia reprodutiva de pinhão manso, inflorescências emasculadas, foram observadas sem isolamento (controle positivo) e isoladas com tecido "nylon" tipo voal para posterior realização dos tratamentos de geitonogamia e xenogamia após a antese. Os tratamentos consistiram de controle positivo (flores não isoladas), e a partir das flores isoladas foram obtidos os demais tratamentos: controle negativo (sem polinização); xenogamia (receberam pólen de outra planta); geitonogamia 1 (receberam pólen da mesma inflorescência); geitonogamia 2 (receberam pólen de outra...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Jatropha curcas L.; Autofecundação; Auto-incompatibilidade; Polinização.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542010000300005