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| Registros recuperados: 143 | |
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| Freire, Juliana Müller; de Azevedo, Marina Coimbra; Cunha, Carlos Fernando da; da Silva, Telmo Félix; Resende, Alexander Silva de. |
| Phenological studies can support actions of seed collection and recovery of degraded areas, contributing to the conservation of forest species. This study aimed to understand the timing of flowering and fruiting of 21 native tree species in fragmented area of Atlantic Forest in Itaboraí, Rio de Janeiro State, Brazil. Ninety one trees were monitored monthly, from January to December of 2011. Most species flowered in the late dry season and early rainy season, and presented a moderate negative correlation between flowering and photoperiod. There were two peaks of fruiting: March-April to zoochoric species and September-October for not zoochoric species, with positive correlation between rainfall and fruiting of zoochoric species. There was a high incidence... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flowering; Fruiting; Phenology; Seeds Recursos Florestais Botânica Silvicultura Fenologia; Floração; Frutificação; Sementes. |
| Ano: 2013 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/454 |
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| Ferreira,Mábele de Cássia; Martins,Fabrina Bolzan; Florêncio,Gabriel Wilson Lorena; Silva,João Pedro Guimarães Cândido; Pasin,Liliana Auxiliadora Avelar Pereira. |
| Abstract: The objective of this work was to estimate the cardinal temperatures and to quantify the thermal requirements for the initial development of seedlings of the native tree species Citharexylum myrianthum and Bixa orellana. A field experiment was carried out in a completely randomized design, in a 2?12 factorial arrangement (2 tree species and 12 sowing dates), with five replicates. The base, optimum, and maximum temperatures for the development of C. myrianthum were 11.4, 18.1, and 36.6°C, and, for B. orellana, 12.0, 18.4, and 46.4°C. The thermal requirements for the development of C. myrianthum was 66.7°C day per leaf, and, for B. orellana, 82.5°C day per leaf. In the initial development, B. orellana shows a large thermal amplitude and is tolerant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bixa orellana; Citharexylum myrianthum; Air temperature; Leaf appearance; Phenology. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000100903 |
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| Streck,Nereu Augusto; Uhlmann,Lilian Osmari; Gabriel,Luana Fernandes. |
| The objective of this work was to test long-term trends in the duration of rice development phases in Santa Maria, RS, Brazil. The duration from emergence to V3 (EM-V3), emergence to panicle differentiation (EM-R1), emergence to anthesis (EM-R4), and emergence to all grains with brown hull (EM-R9) was calculated using leaf appearance and developmental models for four rice cultivars (IRGA 421, IRGA 417, EPAGRI 109, and EEA 406), for the period from 1912 to 2011, considering three emergence dates (early, mid, and late). The trend of the time series was tested with the non-parametric Mann-Kendall test, and the magnitude of the trend was estimated with simple linear regression. Rice development has changed over the last ten decades in this location, leading to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Development rate; Global warming; Growing season; Maturity group; Modeling; Phenology. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000600001 |
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| Fagundes,Joelma Dutra; Streck,Nereu Augusto; Bisognin,Dilson Antônio; Schwantes,Ana Paula; Alberto,Cleber Maus. |
| The objective of this study was to simulate potato (Solanum tuberosum) tuber yield in different climate change scenarios of increased carbon dioxide concentration [CO2] and air temperature, considering symmetric and asymmetric increases in minimum and maximum daily air temperatures. Spitters model was used to simulate Asterix cultivar tuber yield considering two growing seasons (spring and fall) recommended for Santa Maria, state of Rio Grande do Sul, Brazil. In each growing season, five planting dates were evaluated in climate scenarios of a hundred years with no increase in [CO2] and temperature (current scenario), and in scenarios with doubling [CO2] and temperature increases of 0, 1, 2, 3, 4, 5 and 6ºC. A symmetric increase of 4ºC and an asymmetric... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum tuberosum; Global warming; Carbon dioxide concentration; Phenology; Climate risk simulation. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000400002 |
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| Burin,Vívian Maria; Silva,Aparecido Lima da; Malinovski,Luciane Isabel; Rosier,Jean Pierre; Falcão,Leila Denise; Bordignon-Luiz,Marilde Teresinha. |
| The objective of this work was to assess and characterize two clones, 169 and 685, of Cabernet Sauvignon grapes and to evaluate the wine produced from these grapes. The experiment was carried out in São Joaquim, SC, Brazil, during the 2009 harvest season. During grape ripening, the evolution of physical-chemical properties, phenolic compounds, organic acids, and anthocyanins was evaluated. During grape harvest, yield components were determined for each clone. Individual and total phenolics, individual and total anthocyanins, and antioxidant activity were evaluated for wine. The clones were also assessed regarding the duration of their phenological cycle. During ripening, the evolution of phenolic compounds and of physical-chemical parameters was similar... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phenolic compounds; Phenology; Ripeness. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000500004 |
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| Soares,Daniel Jorge; Oliveira,Wladecir Salles de; Uzuele,Elvio Lorençato; Carvalho,Saul Jorge Pinto de; Ovejero,Ramiro Fernando Lopez; Christoffoleti,Pedro Jacob. |
| Abstract: The objective of this work was to evaluate the growth and development of a glyphosate-resistant population of Conyza bonariensis in different sowing dates (autumn, winter, and spring) and in two agricultural environments, based on days or thermal units. Five experiments were performed in two agricultural environments in Brazil: two in the municipality of Não-Me-Toque, in the state of Rio Grande do Sul - with sowings in July and September 2011; and three in the municipality of Santa Cruz das Palmeiras, in the state of São Paulo ‒ with sowings in April, July, and September 2011. In each trial, ten evaluations of the phenological development and total dry mass of C.bonariensis were performed, fitting these variables to a unit of time in days or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hairy fleabane; Dry mass; Growing degree days; Modeling; Phenology; Weed biology.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000100045 |
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| Bartz,Alex Cristiano; Muttoni,Martina; Alberto,Cleber Maus; Streck,Nereu Augusto; Machado,Geter Alves; Giacomeli,Robson; Helgueira,Diogo Balbé; Moura,Diogo da Silva. |
| Abstract: The objective of this work was to evaluate methods of thermal time calculation and the duration of the development stages of lowland rice (Oryza sativa) irrigated by sprinkling. The experiment was conducted during three growing seasons (2010/2011, 2011/2012, and 2014/2015), with five irrigation water depths, six cultivars, and four replicates. Six methods of thermal time calculation were tested: two using the minimum basal temperature; two using the minimum and optimum temperatures; and two using the minimum, optimum, and maximum basal temperatures. For the thermal time calculation, the crop development cycle was divided into the vegetative, reproductive, and grain-filling phases. The methods that used the three cardinal temperatures showed the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Degree-day; Irrigation water depth; Phenology; Water availability.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000700475 |
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| Lago,Isabel; Streck,Nereu Augusto; Alberto,Cleber Maus; Oliveira,Felipe Brendler; Paula,Gizelli Moiano de. |
| The objective of this study was to assess the development response of cultivated rice and red rice to different increases in minimum and maximum daily air temperatures, in Santa Maria, Rio Grande do Sul State, Brazil. One hundred years climate scenarios of temperatures 0, +1, +2, +3, +4, and +5ºC, with symmetric and asymmetric increases in minimum and maximum daily air temperatures were created, using the LARS-WG Weather Generator, and a 1969-2003 database. Nine cultivated rice genotypes (IRGA 421, IRGA 416, IRGA 417, IRGA 420, BRS 7 TAIM, BR-IRGA 409, EPAGRI 109, EEA 406 and a hybrid), and two red rice biotypes (awned black hull-ABHRR, and awned yellow hull-AYHRR) were used. The dates of panicle differentiation (R1), anthesis (R4), and all grains with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Global warming; Phenology; Simulation; Weeds. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008001100001 |
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| GONÇALVES NETTO,A.; NICOLAI,M.; CARVALHO,S.J.P.; MALARDO,M.R.; LÓPEZ-OVEJERO,R.F.; CHRISTOFFOLETI,P.J.. |
| ABSTRACT: The emergence of resistant biotypes of the Amaranthus palmeri species in cotton production areas of the state of Mato Grosso, Brazil, generated the need for correct identification of this species and information on viable herbicidal tools for their management. Thus, greenhouse experiments were conducted to evaluate the efficacy of alternative herbicides applied to A. palmeri in pre and post emergence. A randomized block design with four replications was used. The efficacy of herbicides applied in pre emergence was evaluate in two experiments, one in a clayey and other in a sandy soil; 9 herbicide treatments (8 with herbicide application and a control without application) were applied on each soil. Subsequently, two experiments with different... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caruru; Weed control; Resistance; Phenology; Soil texture. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100193 |
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| Marques,B.S.; Silva,A.P.P.; Lima,R.S.O.; Machado,E.C.R.; Gonçalves,M.F.; Carvalho,S.J.P.. |
| This work was carried out with the objective of evaluating growth and development of sourgrass (Digitaris insularis) based on days or thermal units (growing degree days - GDD). Two independent trials were developed aiming to quantify the species' phenological development and total dry matter accumulation in increasing or decreasing photoperiod conditions. Plants were grown in 4 L plastic pots, filled with commercial substrate, adequately fertilized. In each trial, nine growth evaluations were carried out, with three replicates. Phenological development of sourgrass was correctly fit to time scale in days or GDD, through linear equation of first degree. Sourgrass has slow initial growth, followed by exponential dry matter accumulation, in increasing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digitaria insularis; Growing degree days; Phenology; Dry matter; Biology. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000300003 |
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| Lima,R.S.O.; Machado,E.C.R.; Silva,A.P.P.; Marques,B.S.; Gonçalves,M.F.; Carvalho,S.J.P.. |
| This work was carried out with the objective of elaborating mathematical models to predict growth and development of purple nutsedge (Cyperus rotundus) based on days or accumulated thermal units (growing degree days). Thus, two independent trials were developed, the first with a decreasing photoperiod (March to July) and the second with an increasing photoperiod (August to November). In each trial, ten assessments of plant growth and development were performed, quantifying total dry matter and the species phenology. After that, phenology was fit to first degree equations, considering individual trials or their grouping. In the same way, the total dry matter was fit to logistic-type models. In all regressions four temporal scales possibilities were assessed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cyperus rotundus; Growing degree days; Phenology; Base temperature; Modeling. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200165 |
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| REHMAN,A.; QAMAR,R.; SAFDAR,M.E.; JAVEED,H.M.R.; SHEHZAD,M.; ALI,M.; ASIF,M.; TARAR,Z.H.; AHMED,A.; JAMIL,M.. |
| ABSTRACT: Weed-induced yield loss in wheat crop is a great threat to food security in Pakistan. A comprehensive understanding of weed-crop competition is very important to develop sustainable and cost-effective weed management. For this purpose, two-year field studies were conducted to determine the effect of different blessed milkthistle densities on the phenology and yield of wheat crop in a rice-wheat cropping scheme in Sargodha, Pakistan during 2013-2014 and 2014-2015. The experiment comprised seven treatments: control (weed free), weedy check (weedy without any control) and blessed milkthistle densities of 5, 10, 15, 20 and 25 plants m-2. In response to increasing weed density, a gradual reduction in yield and yield-related traits of wheat was noted.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Blessed milkthistle; Density; Phenology; Rice-wheat cropping systems; Yield. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100210 |
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| Silva,A.P.P.; Marques,B.S.; Lima,R.S.O.; Machado,E.C.R.; Gonçalves,M.F.; Carvalho,S.J.P.. |
| This work was carried out with the objective of evaluating the growth and development of honey weed (Leonurus sibiricus) based on days or thermal units (growing degree days). Thus, two independent trials were developed to quantify the phenological development and total dry mass accumulation in increasing or decreasing photoperiod conditions. Considering only one growing season, honey weed phenological development was perfectly fit to day scale or growing degree days, but with no equivalence between seasons, with the plants developing faster at increasing photoperiods, and flowering 100 days after seeding. Even day-time scale or thermal units were not able to estimate general honey weed phenology during the different seasons of the year. In any growing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leonurus sibiricus; Growing degree days; Phenology; Dry mass; Biology. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000100009 |
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| Fonseca,Rosineide Braz Santos; Funch,Ligia Silveira; Borba,Eduardo Leite. |
| This paper discusses the phenological strategies of Melocactus glaucescens Buining & Brederoo, M. paucispinus G. Heimen & R. Paul, M. ernestii Vaupel and M. ×albicephalus Buining & Brederoo, species from Chapada Diamantina, northeastern Brazil. Melocactus glaucescens, M. ernestii and M. ×albicephalus occur sympatrically in an area of "caatinga"/"cerrado" vegetation, and M. paucispinus in an area of "cerrado"/"campo rupestre". The superposition of flowering in these sympatric taxa was compared and analyzed. The phenology of M. paucispinus was correlated with both abiotic and biotic factors. Flowering of M. glaucescens and M. ×albicephalus were observed to be continuous (though with moderate peaks of activity), while fruiting was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cactaceae; Hybridization; Melocactus; Phenology; Reproductive biology. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042008000200006 |
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| ROSA,LIÉGE; CASTELLANI,TANIA TARABINI; REIS,ADEMIR. |
| Este estudo avaliou as características morfológicas, fenológicas e aspectos da biologia reprodutiva dos indivíduos de uma população de Butia capitata em uma restinga no litoral de Laguna, SC. Numa área de 2500 m2, foram registradas 215 plantas com altura média total de 86,39 cm (S= 27,39; min= 1 e máx= 311). Os indivíduos com altura igual ou inferior a 20 cm não apresentavam evidências de reprodução. A porcentagem de plantas reprodutivas aumentou entre plantas de maior porte, mas nem todos os indivíduos em fase reprodutiva floresceram em anos subseqüentes. Os parâmetros altura total e número de folhas, altura total e comprimento do limbo foliar, assim como número de folhas e número de infrutescências se apresentaram positivamente correlacionados. A... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Butia capitata; Phenology; Reproduction; Sandy coastal vegetation. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041998000300007 |
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| Maués,Márcia Motta; Oliveira,Paulo Eugênio A. M. de; Kanashiro,Milton. |
| Jacaranda copaia (Aubl.) D. Don is a pioneer tree widespread in the Brazilian Amazon, usually found colonizing forest gaps and altered areas, and the forest fragment edges. This study investigated aspects of the floral biology, breeding system and pollinators of J. copaia trees. Flowering lasts from August to November, during the low rainfall period extending up to four weeks per tree and 3-4 months for the population as a whole, characterizing a cornucopia flowering pattern. The fruit set ends in the beginning of the rainy season, with wind dispersed winged seeds. Fruit set from open pollination was 1.06% (n = 6,932). Hand pollination using self-pollen (n = 2,099) did not set fruits. Cross-pollination resulted in 6.54% fruit set (n = 2,524), representing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bees; Floral biology; Late-acting self-incompatibility (LSI); Phenology; Pollinators. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042008000300015 |
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| Registros recuperados: 143 | |
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