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Agricultural water management in a water stressed catchment: lessons from the RIPARWIN project AgEcon
McCartney, Matthew P.; Lankford, Bruce A.; Mahoo, Henry F..
With contributions from Julien Cour, Reuben Kadigi, Japhet Kashaigili, Magayane Machibya, Abraham Mehari, Sylvie Morardet, Kossa Rajabu, Charles Sokile, Siza Tumbo, Barbara van Koppen, Thalia Vounaki and Daniel Yawson
Tipo: Report Palavras-chave: River basin management; Water stress; Irrigation programs; Irrigation management; Irrigation efficiency; Water use; Water allocation; Wetlands; Water rights; Water law; Economic aspects; Water rates; User charges; Water users associations; Decision support tools; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Land Economics/Use; Productivity Analysis; Resource /Energy Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/37668
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Alteração no potencial osmótico e teor de carboidratos solúveis em plantas jovens de lobeira (Solanum lycocarpum St.-Hil.) em resposta ao estresse hídrico Rev. Bras. Bot.
CHAVES FILHO,JALES TEIXEIRA; STACCIARINI-SERAPHIN,ELIANE.
Solanum lycocarpum é uma espécie típica da vegetação do cerrado brasileiro e tem demonstrado resistência à seca que ocorre em seu ambiente. O ajustamento osmótico é um decréscimo do potencial osmótico causado pelo acúmulo de solutos nas células, o qual mantém o gradiente de potencial hídrico e, ao mesmo tempo, a turgescência necessária ao crescimento celular. A influência do estresse hídrico no potencial osmótico e no teor de carboidratos solúveis foi investigada neste trabalho. A análise dos resultados mostrou que as plantas de Solanum lycocarpum apresentaram redução significativa nos valores de potencial osmótico em resposta ao estresse hídrico. O aumento no teor de carboidratos solúveis foi verificado em plantas sob condições estressantes em casa de...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Osmotic adjustment; Water stress; "cerrado" vegetation; Savannah; Carbohydrate.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000200010
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Anatomic and physiological modifications in seedlings of Coffea arabica cultivar Siriema under drought conditions Ciência e Agrotecnologia
Melo,Emanuelle Ferreira; Fernandes-Brum,Christiane Noronha; Pereira,Fabrício José; Castro,Evaristo Mauro de; Chalfun-Júnior,Antonio.
Due to the weather changes prognostic for the coming years, the understanding of water deficit and physiological responses of plants to drought becomes an important requirement in order to develop technologies such as mechanisms to assist plants to cope with longer drought periods, which will be essential to maintenance of Brazilian and worldwide production. This study aimed to evaluate ecophysiological and anatomical aspects as well as the nitrate reductase activity in Siriema coffee seedlings subjected to four treatments: Daily irrigated, non-irrigated, re-irrigated 24 hours and re-irrigated 48 hours after different stress periods. Non-irrigation promoted a reduction in leaf water potential being accented from the ninth day of evaluation onwards....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffee tree; Ecophysiology; Water stress; Nitrate reductase.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000100003
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Anatomical and morphological modifications in response to flooding by six Cerrado tree species Acta Botanica
Oliveira,Adilson Serafim de; Ferreira,Cristiane Silva; Graciano-Ribeiro,Dalva; Franco,Augusto César.
Wetlands are common in the Cerrado (Brazilian savannas) biome, however flooding of these wetlands impairs growth and development of most plants. We evaluated flood tolerance of typical Cerrado trees. Seedlings of Aspidosperma macrocarpon (Apocynaceae), Tabebuia rosea (Bignoniaceae), Handroanthus chrysotrichus (Bignoniaceae), Myracrodruon urundeuva (Anacardiaceae), Kielmeyera coriacea (Calophyllaceae) and Copaifera langsdorffii (Fabaceae) were flooded up to the stem base for 30 days. Stems with cortical cracks, secondary aerenchyma and hypertrophic lenticels were observed in flooded plants of M. urundeuva,H. chrysotrichus and T. rosea while adventitious roots were formed in flooded plants of T. rosea and H. chrysotrichus. However, only T. rosea developed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aerenchyma; Biomass partitioning; Flood tolerance; Hypoxia; Water stress.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000400478
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Aplicación de tecnologías de percepción remota en la estimación de rendimientos en caña de azúcar. Colegio de Postgraduados
Zenteno Cruz, Guillermo Alberto.
Los productores de caña de azúcar buscan constantemente formas de reducir costos, aumentar la productividad y los rendimientos, pero en general, son pocas las herramientas que se están aplicando para tal fin. Por otra parte, es cada vez más importante la predicción temprana del rendimiento de los cultivos que permita una planificación de políticas agrícolas y de seguridad alimentaria en una economía de mercado globalizado. Con el propósito de calibrar una metodología para enfrentar estos problemas, la presente investigación se llevó a cabo en la zona de abasto del Ingenio Emiliano Zapata, en Morelos, México, en una superficie de 10, 664 hectáreas, durante el ciclo agrícola 2009-2010. El propósito del estudio fue determinar una función matemática para...
Palavras-chave: Predicción temprana; Indices de vegetación; Estrés hídrico; Evapotranspiración; Saccharum officinarum; Early prediction; Vegetation indices; Water stress; Evapotranspiración; Maestría; Hidrociencias.
Ano: 2012 URL: http://hdl.handle.net/10521/737
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Application of the Hybrid-Maize model for limits to maize productivity analysis in a semiarid environment Scientia Agricola
Liu,Yi; Yang,Shenjiao; Li,Shiqing; Chen,Fang.
Effects of meteorological variables on crop production can be evaluated using various models. We have evaluated the ability of the Hybrid-Maize model to simulate growth, development and grain yield of maize (Zea mays L.) cultivated on the Loess Plateau, China, and applied it to assess effects of meteorological variations on the performance of maize under rain-fed and irrigated conditions. The model was calibrated and evaluated with data obtained from field experiments performed in 2007 and 2008, then applied to yield determinants using daily weather data for 2005-2009, in simulations under both rain-fed and irrigated conditions. The model accurately simulated Leaf Area Index , biomass, and soil water data from the field experiments in both years, with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crop simulation; Maize model; Potential productivity; Water stress; Spring maize.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162012000500003
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ASSESSMENT OF CORN WATER UPTAKE BASED ON SAP HEAT TRACING UNDER WATER-STRESSED CONDITIONS AGRIAMBI
Santos,Antonio Odair; Bergamaschi,Homero; Rosa,Luís M. G.; Bergonci,João I.; Radin,Bernadete.
ABSTRACT Crop water monitoring is an important aspect for precise control of irrigation. A reliable and movable technique is needed to properly assess water uptake of crops in the field. Water uptake by field grown maize ( Zea mays L.), in water-limited conditions was verified with the heat pulse system. The temperature difference between two radially inserted thermocouples, one 9 mm above and the other 4 mm below a heater piercing the maize stem, was measured every 0.3 sec following emission of a heat pulse in conditions of varied atmospheric demand. Comparisons of heat pulse system outputs and a high precision transpiration model estimates were done on hourly and daily basis, when low sap velocities were expected to occur. Hourly and daily basis of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sap flow; Transpiration; Water stress; Heat pulse.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43661999000200145
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Autonomy and network modulation of photosynthesis and water relations of Coffea arabica in the field Braz. J. Plant Physiol.
Camargo-Bortolin,Lívia H.G. de; Prado,Carlos H.B. A.; Souza,Gustavo M.; Novaes,Paula.
The degree of connection between leaf gas exchange and leaf water potential, and the autonomy of these variables in relation to meteorological conditions were determined in three cultivars of Coffea arabica during clear and cloudy days. High values of vapor pressure deficit, air temperature and photosynthetic photon flux density resulted in low leaf autonomy during a clear day, irrespective the degree of connection among leaf physiological variables. Tight synchronization between physiological and meteorological variables was considered one important cause of net photosynthesis (P N) decreasing during a clear day. In contrast, diurnal P N was around three times higher on a cloudy day, when all cultivars presented high autonomy. Principal component analyses...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea canephora; Connectance degree; Daily net photosynthesis; System analysis; Water stress.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000200006
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Avaliação de cultivares de soja quanto à tolerância ao estresse hídrico em substrato contendo polietileno glicol - DOI: 10.4025/actasciagron.v30i2.1731 Agronomy
Texeira, Leandra Regina; UEM; Braccini, Alessandro de Lucca e; UEM; Sperandio, Decio; UEM; Scapim, Carlos Alberto; UEM; Schuster, Ivan; Cooperativa Central de Pesquisa Agricola; Viganó, Joselaine; UEM.
O trabalho teve por objetivo avaliar genótipos de soja quanto à tolerância ao estresse hídrico, em substrato embebido com polietileno glicol (PEG 6000). Foram utilizadas sementes armazenadas por um ano, em condições não-controladas de laboratório das cultivares: CD 201, CD 202, CD 204, CD 205, CD 206, CD 208, CD 215, CD 216, Embrapa 48, BRS 132, BRS 184 e BRS 212. As avaliações consistiram em submeter às sementes aos testes de germinação, classificação do vigor das plântulas, comprimento e biomassa seca das plântulas, em condição de estresse hídrico, utilizando dois níveis de potencial osmótico (zero e -0,1 MPa). As cultivares foram agrupadas em diferentes classes de tolerância à seca, em razão da redução percentual nas características avaliadas {% Redução...
Palavras-chave: 5.01.03.05-9 Melhoramento Vegetal Glycine max (L.) Merrill; Sementes; Potencial osmótico; Germinação; Estresse hídrico 5.01.03.05-9 Melhoramento Vegetal Glycine max (L.) Merrill; Seeds; Osmotic potential; Germination; Water stress.
Ano: 2008 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1731
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Biomass production and grain yield of three sorghum lines difering in drought resistance Phyton
Castro-Nava,S; Ortiz-Cereceres,J; Mendoza-Castillo,M del C; Huerta,AJ.
The aim of this study was to determine the eficiency of drought classification criteria that we previously reported for our grain sorghum genotypes. Two tolerant genotypes of grain sorghum [Sorghum bicolor (L.) Moench] (UAT-124 and UAT-152) and one susceptible (UAT-30) were subjected to drought under greenhouse conditions at either panicle initiation, flag leaf, or flowering. Results showed that the effects of drought depended on when drought stress occurred during development. Biomass of the three sorghum genotypes was significantly reduced at the flag leaf stage (48%) by drought stress, but the greatest reduction occurred in the susceptible genotype UAT-30 (71%). Results showed that biomass accumulation for UAT-124 and UAT-30 was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sorghum bicolor L. Moench; Water stress; Drought; Phenology; Biomass accumulation; Grain yield.
Ano: 2012 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572012000200002
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cDNA-AFLP analysis of Psidium guajava L. cultivars under water stress and mechanical injury: methodological implications Braz. J. Plant Physiol.
Furlan,Cláudia Maria; Zanotta,Samantha; Salatino,Antonio.
Studies involving amplified fragment length polymorphism (cDNA-AFLP) have often used polyacrylamide gels with radiolabeled primers in order to establish best primer combinations, to analyze, and to recover transcript-derived fragments. Use of automatic sequencer to establish best primer combinations is convenient, because it saves time, reduces costs and risks of contamination with radioactive material and acrylamide, and allows objective band-matching and more precise evaluation of transcript-derived fragments intensities. This study aimed at examining the gene expression of commercial cultivars of P. guajava subjected to water and mechanical injury stresses, combining analyses by automatic sequencer and fluorescent kits for polyacrylamide gel...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Automatic sequencer; Gene expression; Mechanical injury; Water stress.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000100005
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Changes in morpho-physiological attributes of Eucalyptus globulus plants in response to different drought hardening treatments Electron. J. Biotechnol.
Coopman,Rafael E; Jara,Jorge C; Bravo,Leon A; Sáez,Katia L; Mella,Gloria R; Escobar,Rene.
Morpho-physiological attributes exhibited in response to drought hardening at the end of the growing season of Eucalyptus globulus Labill under nursery conditions were studied to evaluate the effect of three drought hardening treatments in morpho-physiological traits used as suitable indicators of drought hardiness, such as, plant growth, root growth potential, plant water relationships and survival. Freezing resistance of drought hardened plants was also studied in order to evaluate cross hardening effects in cuttings of Eucalyptus globulus Labill. Drought hardening consisted in induced water stress by watering restriction, until plant stem xylem water potentials (Ψpd) reached to-0.2, -1.3 and -2.4 MPa. Two water stress-rewatering cycles were...
Tipo: Journal article Palavras-chave: Freezing resistance; Root growth potential; Stem xylem water potential; Water stress; Water relationships.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000200005
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Chemical composition of Panicum maximum ‘BRS Zuri’ subjected to levels of salinity and irrigation depths Rev. Ciênc. Agron.
Silva,Eranildo Brasil da; Carneiro,Maria Socorro de Souza; Furtado,Rafael Nogueira; Lopes,Marcos Neves; Braga,Marilena de Melo.
ABSTRACT The study of cultivars with moderate flood tolerance is essential to their use in pastures irrigated with saline water. The aim of this study was to evaluate the chemical composition of Panicum maximum ‘BRS Zuri’ under the effect of different irrigation depths and levels of salinity. A randomised block design of split plots was used with five replications per treatment. The treatments resulted from the combination of three levels of water salinity (S1 = 0.6, S2 = 1.8 and S3 = 3.0 dS m-1) and four levels of irrigation (I1 = 60%, I2 = 80%, I3 = 100% and I4 = 120% of the evapotranspiration). The chemical composition of the grass, Panicum maximum ‘BRS Zuri’, cut at 28 days, was evaluated over two cycles. There was an interaction between the factors...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Saline water; Water stress; Dry matter; Pasture.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100416
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Chitosan application in the induction of water deficit tolerance in maize plants Agronomy
Almeida, Lorena Gabriela; Magalhães, Paulo César; Karam, Décio; Silva, Eder Marcos da; Alvarenga, Amauri Alves.
The present research seeks to elucidate the feasibility of chitosan (CHT) in the induction of water deficit tolerance in different maize hybrids, contrasting tolerance to water restriction, tolerance and sensitivity. The maize plants were subjected to water deficit and foliar application of different chitosan doses (60, 100, 140, and 180 mg L-1) at the pre-flowering growth stage and evaluated during the stress period of fifteen days. To understand the induction behaviour of the tolerance to water restriction, biophysical parameters, such as water potential, relative water content and chlorophyll content, gas exchange, and biochemical assays, were quantified based on the activity of SOD, CAT, APX, and PAL antioxidant enzymes, lipid peroxidation activity and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antiperspirant; Antioxidant enzymes; Water stress; Gas exchange..
Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42463
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Co-inoculation with Azospirillum brasilense in soybean cultivars subjected to water déficit AGRIAMBI
Naoe,Alessandra M. de L.; Peluzio,Joênes M.; Campos,Leonardo J. M.; Naoe,Lucas K.; Silva,Roberta A. e.
ABSTRACT This study aimed to verify the effect of co-inoculation, association between Azospirillum brasilense and Bradyrhizobium japonicum bacteria, on soybean plants subjected to water deficit at two sowing dates. Two field experiments were conducted at the Universidade Federal de Tocantins, campus of Palmas, Brazil, in 2016. The experimental design was randomized blocks in a split-split-plot arrangement with four repetitions, where the plots consisted of two irrigation depths (100 and 25% of crop evapotranspiration - ETc), the subplots was composed of two methods of inoculant application (inoculation with Bradyrhizobium japonicum and co-inoculation with Azospirillum brasilense + Bradyrhizobium japonicum) and the sub-subplots comprised two soybean...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max (L.) Merrill; Rhizobacteria; Water stress; Irrigation.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000200089
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Common bean yield under water suppression and application of osmoprotectants AGRIAMBI
Bastos,Fabiano J. de C.; Soares,Frederico A. L.; Sousa,Camylla V.; Tavares,Cássio J.; Teixeira,Marconi B.; Sousa,Antonio E. C..
ABSTRACT The objective of this study was to evaluate the performance of the common bean crop grown with application of osmoprotectants based on algae of the genus Durvillaea potatorum in the winter crop season, with occurrence or not of water suppression. The experiment used a randomized block design, in split plots, arranged in a 4x7 factorial scheme, in which the plots were composed of four treatments - periods of water suppression (7, 14, 21 days and the control treatment: 100% of field capacity throughout the crop cycle) and the subplots consisted of seven types of osmoprotectants. The treatments with osmoprotectants was applied during the full flowering of the common bean. Three days after application of osmoprotectants, the treatments with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phaseolus vulgaris; Durvillaea potatorum; Water stress; Yield.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000800697
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Corn downy mildew program Thai Agricultural
Renfro, B.L.; Narong Singburaudom; Singh, Jaswant; Bhat, S. Shankara.
13 tables
Palavras-chave: Corn; Maize; Downy mildew; Peronosclerospora sorghi; Varieties; Disease resistance; Infection; Plant density; Nitrogen fertilizers; Phosphate fertilizers; Water stress; Yields; ข้าวโพด; โรคราน้ำค้าง.
Ano: 1977 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3933
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Correlation and path analysis of yield and its components and plant traits in wheat Ciência Rural
Okuyama,Lauro Akio; Federizzi,Luiz Carlos; Barbosa Neto,José Fernandes.
This study was aimed to characterize yield components and plant traits related to grain yield. Correlation and path analysis were carried out in wheat genotypes grown under irrigated and non-irrigated field conditions. In the path coefficient analysis, grain yield represented the dependent variable and the number of spikes m-2, number of grains spike-1, kernel weight, days to anthesis, above-ground biomass m-2 and plant height were the independent ones. In both years, periods without rain occurred from early milk to grain ripening and from flag leaf sheath opening to grain ripening for first and second sowing dates, respectively. Character associations were similar in both water regimes. Grain yield showed positive phenotypic correlation with above-ground...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum; Water stress; Higher grain yield.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000600006
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Crecimiento y estructura de la raíz en plantas de Pinus pinceana sometidas a dos condiciones de humedad del suelo. Colegio de Postgraduados
Córdoba Rodríguez, Diana.
Pinus pinceana Gordon es un pino piñonero endémico que crece en poblaciones aisladas en condiciones semiáridas, en el noreste y centro-oriente de México. Con el propósito de identificar características de la raíz asociadas a mecanismos de adaptación ante condiciones de estrés hídrico, se evaluó el crecimiento y estructura de la raíz en plantas de seis poblaciones de la especie en dos condiciones de humedad del suelo. El estudio se realizó en plantas de tres años de edad y recién germinadas manteniendo la humedad del suelo cercana a capacidad de campo (S0) o por debajo de 20 % de humedad aprovechable (S1). Se determinó que en las plantas de tres años de edad, el estrés hídrico redujo en 27 % el número de raíces principales, en 51 % la biomasa de la raíz...
Palavras-chave: Pinus pinceana; Crecimiento de raíz; Distribución de biomasa; Estrés hídrico; Relación parte aérea/raíz; Sequía; Biomass allocation; Drought; Root growth; Shoot/root ratio; Water stress; Maestría; Forestal.
Ano: 2010 URL: http://hdl.handle.net/10521/225
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Crecimiento y estructura de la raíz en plantas de Pinus pinceana sometidas a dos condiciones de humedad del suelo. Colegio de Postgraduados
Córdoba Rodríguez, Diana.
Pinus pinceana Gordon es un pino piñonero endémico que crece en poblaciones aisladas en condiciones semiáridas, en el noreste y centro-oriente de México. Con el propósito de identificar características de la raíz asociadas a mecanismos de adaptación ante condiciones de estrés hídrico, se evaluó el crecimiento y estructura de la raíz en plantas de seis poblaciones de la especie en dos condiciones de humedad del suelo. El estudio se realizó en plantas de tres años de edad y recién germinadas manteniendo la humedad del suelo cercana a capacidad de campo (S0) o por debajo de 20 % de humedad aprovechable (S1). Se determinó que en las plantas de tres años de edad, el estrés hídrico redujo en 27 % el número de raíces principales, en 51 % la biomasa de la raíz...
Palavras-chave: Pinus pinceana; Crecimiento de raíz; Distribución de biomasa; Estrés hídrico; Relación parte aérea/raíz; Sequía; Biomass allocation; Drought; Root growth; Shoot/root ratio; Water stress; Maestría; Forestal.
Ano: 2010 URL: http://hdl.handle.net/10521/225
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