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Registros recuperados: 18
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Aparecimento de folhas em mudas de eucalipto estimado por dois modelos Repositório Alice
MARTINS, F.B.; STRECK, N.A..
O objetivo deste trabalho foi avaliar e comparar os modelos do Filocrono e de Wang e Engel para estimativa do aparecimento de folhas em mudas de Eucalyptus grandis e E. saligna. Foram instalados dois experimentos em Santa Maria em 2005 e 2006, um, em campo, com nove épocas de semeadura, e o outro, em casa, de vegetação com duas épocas de semeadura. Os modelos usados foram o do Filocrono, que assume uma relação linear entre taxa de aparecimento de folhas e temperatura, e o de Wang e Engel, que assume uma relação não-linear entre taxa de aparecimento de folhas e temperatura. As quatro primeiras épocas de semeadura em campo foram usadas para estimar os coeficientes dos modelos utilizados. As épocas de semeadura restantes do experimento em campo e as duas...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Eucalyptus grandis; Eucalyptus saligna; Desenvolvimento vegetal; Soma térmica; Taxa de aparecimento de folhas; Plant development; Thermal time; Leaf appearance rate.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/126259
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Base temperature and simulation model for nodes appearance in cape gooseberry (Physalis peruviana L.) Rev. Bras. Frutic.
Salazar,Melba Ruth; Jones,James W.; Chaves,Bernardo; Cooman,Alexander; Fischer,Gerhard.
Data was analyzed on development of the solanaceen fruit crop Cape gooseberry to evaluate how well a classical thermal time model could describe node appearance in different environments. The data used in the analysis were obtained from experiments conducted in Colombia in open fields and greenhouse condition at two locations with different climate. An empirical, non linear segmented model was used to estimate the base temperature and to parameterize the model for simulation of node appearance vs. time. The base temperature (Tb) used to calculate the thermal time (TT, ºCd) for node appearance was estimated to be 6.29 ºC. The slope of the first linear segment was 0.023 nodes per TT and 0.008 for the second linear segment. The time at which the slope of node...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nodes; Simulation; Thermal time; Base temperature; Cape gooseberry.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452008000400004
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Base temperature for leaf appearance and phyllochron of selected strawberry cultivars in a subtropical environment Bragantia
Rosa,Hamilton Telles; Walter,Lidiane Cristine; Streck,Nereu Augusto; Andriolo,Jerônimo Luiz; Silva,Michel Rocha da; Langner,Josana Andréia.
Leaf development is characterized by the appearance of new leaves and is related to crop leaf area index, which affects the interception of solar radiation used for photosynthesis and biomass production and ultimately defines crop yield. The objectives of this paper were to estimate the base temperature for leaf appearance and to determine the phyllochron of two strawberry cultivars considering several planting dates. A two-year field experiment was conducted during 2008 and 2009 in Santa Maria (RS). The cultivars Arazá (early) and Yvapitá (late) were used at three planting dates in both years. Base temperature (Tb) was estimated using the Mean Square Error (MSE) approach of the regression between accumulated leaf number (LN) and accumulated thermal time...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fragaria x ananassa; Leaf development; Plant development; Temperature; Thermal time.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052011000400029
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Base temperature for node emission and plastochron determination in tomato species and their hybrids PAB
Zeist,André Ricardo; Resende,Juliano Tadeu Vilela de; Faria,Marcos Ventura; Gabriel,André; Silva,Israel Felipe Lustosa da; Lima Filho,Renato Barros de.
Abstract: The objective of this work was to estimate the base temperature for node emission and plastochron determination in wild species of tomato, in the Redenção cultivar, and in their respective interspecific F1 hybrids. The wild accessions Solanum pimpinellifolium AF 26970, Solanum galapagense LA-1401, Solanum peruvianum AF 19684, Solanum habrochaites var. hirsutum PI-127826, Solanum habrochaites var. glabratum PI-134417, and Solanum pennellii LA-716; the cultivar Redenção (Solanum lycopersicum); and their respective interspecific hybrids were evaluated, on the transplanting dates 12/22/2015, 2/12/2016, and 4/6/2016. The base temperature was estimated using the least mean squared error of the linear regression between the number of nodes and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum lycopersicum; Pre-breeding; Thermal time; Wild accessions.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000300307
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Characterization of genetic coefficients of durum wheat (Triticum turgidumL. ssp. durum)'Llareta-INIA' and 'Corcolén-INIA' Chilean J. Agric. Res.
Garrido,Marco; Román,Luis; Silva,Paola; Castellaro,Giorgio; García de Cortázar,Víctor; Acevedo,Edmundo.
The genetic coefficients, representative of a crop, are necessary to use growth models; in many cases the range of the species is known, but there are no specific values for varieties. Durum wheat (Triticum turgidumL. ssp. durum)'Llareta-INIA' and 'Corcolén-INIA' were sown under irrigation in the experiment station Antumapu of the Universidad de Chile on 29 June 2007, 19 May 2009, and 15 June 2010 in order to determinate four genetic coefficients: developmental thermal time, phyllochron (PHLN), extinction coefficient (k), and radiation use efficiency (RUE), and to evaluate the performance of these coefficients. Thermal times to anthesis and from anthesis to physiological maturity were 652 and 541 °C d, respectively. Two PHLN values were found, 46.6 °C d...
Tipo: Journal article Palavras-chave: Simulation; Thermal time; Radiation use efficiency; Extinction coefficient.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000200002
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Comparison of eight degree-days estimation methods in four agroecological regions in Colombia Bragantia
Rodríguez Caicedo,Daniel; Cotes Torres,Jose Miguel; Cure,José Ricardo.
Eight methods were used to estimate degree-days in four Colombian localities. Four methods have been previously proposed in literature: Simple Sine, Double Sine, Simple Triangle, and Double Triangle methods. The other four methods are proposed in this research: Simple Logistic, Double Logistic, Simple Normal, and Double Normal. The estimation of the degree-days through hourly temperature values was used as the reference standard method, and the four localities from where the temperature values were taken were the municipalities of Cajicá (Cundinamarca), Santa Elena (Antioquia), Carepa (Urabá Antioqueño), and Ciudad Bolivar (Zona cafetera Antioqueña). Degree-days obtained by all methods under study were compared through linear regression to those obtained...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Degree-days; Thermal time; Temperature threshold; Statistical modeling.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052012000200020
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Componentes genéticos do desenvolvimento e maturação de frutos de Coffea canephora Pierre ex A.Froehner. Repositório Alice
SOUZA, C. A. de; ROCHA, R. B.; ALVES, E. A.; ESPINDULA, M. C.; RAMALHO, A. R.; TEIXEIRA, A. L.; FERRAO, M. A. G..
ciclo de maturação dos frutos do cafeeiro Coffea canephora é uma característica de herança complexa, de expressão governada por vários genes influenciados pelo ambiente, o que resulta em uma característica quantitativa de distribuição contínua. O objetivo desse trabalho foi caracterizar os componentes genéticos do ciclo de maturação dos frutos de C. canephora visando caracterizar o mecanismo de herança e a influência do ambiente na expressão dessa característica. Para isso foram avaliados o número de dias e a soma térmica para a maturação dos frutos de 130 clones, avaliados ao longo de 36 meses, em delineamento de blocos ao acaso com seis repetições de quatro plantas por parcela no município de Ouro Preto do Oeste - RO. Os valores genotípicos e os...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Ciclo de maturação; Acurácia de seleção; Soma térmica; Amazônia; Rondônia; Ripening cycle; Accuracy of selection; Thermal time; Amazonia; Brazil.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1081788
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Demographic and Phenological Studies on David’s Spurge (Euphorbia davidii) in the Central Area of Buenos Aires Province, Argentina Planta Daninha
NÚÑEZ FRÉ,F.R.; JUAN,V.F.; SAINT ANDRÉ,H.M.; CHANTRE,G.R..
ABSTRACT: David’s Spurge is an spring-summer annual weed, present in the central area of Buenos Aires Province, Argentina. Field studies were carried out during 2011/12 and 2013/14 to assess demography and population dynamics and determine a thermal time scale of this species. At the experimental site, 1 m² quadrants were established as observational plots, four per cohort. The number of individuals at each phenological stage and from each cohort was recorded weekly. At the end of the experiment, all plots were harvested, and seed production was determined. A thermal time scale was established to identify the occurrence of the different phenological events. Three cohorts were detected, the first one emerged in mid-October, the second one in early November,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cohort; EUDA5; Life table; Weed; Thermal time; Euphorbiaceae.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100288
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Estimating leaf appearance rate and phyllochron in safflower (Carthamus tinctorius L.) Ciência Rural
Streck,Nereu Augusto; Bellé,Rogério Antonio; Rocha,Edileusa Kersting da; Schuh,Mariângela.
Safflower may be an interesting option for the flower market, either as fresh or dried cut flower. Estimating the leaf appearance rate and the phyllochron (the time interval between the appearance of successive leaves) is important for calculating the number of emerged leaves (NL) on the plant, which is an excellent measure of plant development. The objective of this study was to estimate the leaf appearance rate and the phyllochron in safflower (Carthamus tinctorius L.). An experiment was conducted in Santa Maria, RS, Brazil, inside an 8 x 15m plastic greenhouse. Sowing was on 03 October 2003 and emergence was on 08 October 2003. The experimental design was a randomized complete block design with three replications. The main stem NL was measured twice a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaf emergence; Thermal time; Safflower.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782005000600036
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Filocrono e número de folhas da canola em diferentes condições ambientais. Repositório Alice
DALMAGO, G. A.; FOCHESATTO, E.; KOVALESKI, S.; TAZZO, I. F.; BOLIS, L. M.; CUNHA, G. R. da; NIED, A. H.; BERGAMASCHI, H.; SANTI, A..
2013
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Brassica napus; Brassica juncea; Colza; Emissão de folhas; Fenologia; Soma térmica; Rapeseed; Leaf appearance; Phenology; Thermal time.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/978575
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Influência do preparo do solo na duração dos subperíodos de desenvolvimento da canola em solos com excesso hídrico. Repositório Alice
TARTAGLIA, F. de L.; RIGHI, E. Z.; ROCHA, L. da; MALDANER, I. C.; HELDWEIN, A. B.; DALMAGO, G. A..
2015
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Brassica napus L; Canola; Fenologia; Soma térmica; Encharcamento do solo; Agrometeorologia; Phenology; Thermal time; Waterlogged soil.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1026669
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Number of leaves and phenology of rice hybrids simulated by the SimulArroz model AGRIAMBI
Ribas,Giovana G.; Streck,Nereu A.; Duarte Junior,Ary J.; Nascimento,Moises F. do; Zanon,Alencar J.; Silva,Michel R. da.
ABSTRACT Process-based-models can predict leaf and reproductive development of agricultural crops. The objective of this study was to calibrate and evaluate the SimulArroz model in simulating the number of leaves on the main culm and the phenology of three hybrid rice cultivars in Rio Grande do Sul, Brazil. Field experiments were conducted in Santa Maria, Cachoeirinha, Uruguaiana and Santa Vitória do Palmar, in Rio Grande do Sul state, in two growing seasons. Observations were made to determine the number of leaves in the main culm through the Haun scale and the phenology of three hybrid cultivars (PRIME CL, INOV CL and QM 1010 CL) and a conventional rice cultivar used as a control (IRGA 424). The calibration of the SimulArroz model was efficient for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oryza sativa; Haun stage; Thermal time.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000400221
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Phyllochron and leaf appearance rate in oat Bragantia
Chaves,Gabriela Görgen; Cargnelutti Filho,Alberto; Alves,Bruna Mendonça; Lavezo,André; Wartha,Cleiton Antonio; Uliana,Daniela Barbieri; Pezzini,Rafael Vieira; Kleinpaul,Jéssica Andiara; Neu,Ismael Mario Márcio.
Abstract Phyllochron and leaf appearance rate are both important parameters in the production efficiency of agricultural crops. The objectives of this study were to determine the phyllochron and leaf appearance rate in 4 oat cultivars (Avena sativa L.) in 3 sowing dates and verify the variability of phyllochron and leaf appearance rate among cultivars and sowing dates. The experimental design was the completely randomized with 12 treatments and 20 repetitions. Treatments were formed by the combination of 4 cultivars (URS Charrua, URS Taura, URS Estampa, and URS Corona) and 3 sowing dates in 2014 (April 28, May 28, and July 14). In each plant (repetition) of each treatment, the number of expanded leaves (NEL) was counted 3 times per week from the first leaf...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Avena sativa L.; Plant development; Thermal time; Leaf emission.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000100073
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Simulating maize phenology as a function of air temperature with a linear and a nonlinear model. Repositório Alice
STRECK, N.A.; LAGO, I.; GABRIEL, L.F.; SAMBORANHA, F.K..
The objective of this study was to adapt a nonlinear model (Wang and Engel ? WE) for simulating the phenology of maize (Zea mays L.), and to evaluate this model and a linear one (thermal time), in order to predict developmental stages of a field-grown maize variety. A field experiment, during 2005/2006 and 2006/2007 was conducted in Santa Maria, RS, Brazil, in two growing seasons, with seven sowing dates each. Dates of emergence, silking, and physiological maturity of the maize variety BRS Missões were recorded in six replications in each sowing date. Data collected in 2005/2006 growing season were used to estimate the coefficients of the two models, and data collected in the 2006/2007 growing season were used as independent data set for model evaluations....
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Zea mays; Degree days; Development; Modeling; Thermal time.
Ano: 2008 URL: http://www.alice.cnptia.embrapa.br/handle/doc/124201
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Simulating maize phenology as a function of air temperature with a linear and a nonlinear model PAB
Streck,Nereu Augusto; Lago,Isabel; Gabriel,Luana Fernandes; Samboranha,Flavia Kaufmann.
The objective of this study was to adapt a nonlinear model (Wang and Engel - WE) for simulating the phenology of maize (Zea mays L.), and to evaluate this model and a linear one (thermal time), in order to predict developmental stages of a field-grown maize variety. A field experiment, during 2005/2006 and 2006/2007 was conducted in Santa Maria, RS, Brazil, in two growing seasons, with seven sowing dates each. Dates of emergence, silking, and physiological maturity of the maize variety BRS Missões were recorded in six replications in each sowing date. Data collected in 2005/2006 growing season were used to estimate the coefficients of the two models, and data collected in the 2006/2007 growing season were used as independent data set for model evaluations....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Degree days; Development; Modeling; Thermal time.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008000400002
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Taxa de surgimento de folhas em híbridos de canola pelas épocas e anos de semeadura. Repositório Alice
KRÜGER, C. A. M. B.; TIZOTT, J. M.; SILVA, A. J. da; CASALI, I.; SILVA, J. A. G. da; DALMAGO, G. A..
2015
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Brassica napus L; Canola; Morfogênese; Soma térmica; Agrometeorologia; Morphogenesis; Thermal time; Agrometeorology.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1026670
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低需冷量桃樹果實發育所需的熱量時間 Taiwan Agricultural Research Institute
宋家瑋; 歐錫坤; Chia-Wei Song;Shyi-Kuan 0u.
[[abstract]]估算本省霧峰地區11個低需冷量桃栽培種果實發育的熱量時間 (degree days,℃d,以10℃為基本溫度,從盛花期至第一次商業性採收的積溫)與果實發育日數(FDP)。結果顯示:桃的成熟時間是依開花早晚與果實發育日數的長短而定,其中早熟種之果實發育日數為83~98天,熱量時間為821~1,066℃d,中熟種之果實發育日數為109~128天,熱量時間為1,022~1,264℃d,晚熟種之果實發育日數大於130 天,熱量時間大於1,523℃d。
Palavras-chave: 桃 低需冷量 果實發育日數 熱量時間 成熟期 Peach; Low-Chilling requirement; Fruit development period; Thermal time; Ripening date [[classification]]6.
Ano: 1997
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水芋葉面積指數動態的季節性變異 Taiwan Agricultural Research Institute
陳烈夫; 呂椿棠; 呂秀英; Lit-Fu Chan;Chun-Tang Lu;Hsiu-Ying Lu.
[[abstract]]本研究利用從水芋移植後起所累計的每日大於0℃之平均氣溫總和作為溫度時問,以解析本省水芋於不同種植期下葉面積指數 (LAI) 在整個生長期的動態變化及季節變異性,發現LAI為溫度總和的二次指數函數,藉此關係式可預估出所有種植期下水芋LAI達到最大值所需的溫度時間均至少在4000℃以上。不同種植期之LAI增加速率及最大值會因氣候差異影響而表現不一,其中以氣溫為最主要影響因子,其次是日射量。雖然本省水芋可全年種植,但以1月種植期的LAI增加速率最快且在年度間變異最小,倘提前於11月或延後至3-5月種植有可能分別因為低溫、梅雨或颱風等異常氣候而減緩葉片生長。若於7-9月之夏季秋初時種植因整個生長期處於氣溫及日射量均較低的秋冬季,故最不利於水芋葉片生長。最大LAI值(LAIX)及溫度總和達4000℃時之累積LAI (CLAI4000) 對收穫球莖乾物重 (CDWHV) 之影響均呈極顯著的直線關係,表示LAI增加速率及最大值愈大,球莖產量則愈高;當LAIX提高1單位時,CDWHV可增加約68公克;當CLAI4000。提高1單位時,CDWHV可增加約24公克。
Palavras-chave: 芋 葉面積指數 動態 溫度時間 溫度總合 球莖產量 Taro (Colocasia esculenta (L.) Schott); Leaf area index; Dynamics; Thermal time; Temperature sum; Corm yield [[classification]]6.
Ano: 1997
Registros recuperados: 18
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