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| Ferreira,Mábele de C.; Martins,Fabrina B.; Florêncio,Gabriel W. L.; Pasin,Liliana A. A. P.. |
| ABSTRACT The aim of this study was to estimate cardinal temperatures (base, optimum, and maximum), and simulate the vegetative development of guava crop through phyllochron (linear) and Wang and Engel (nonlinear) models at the seedling phase. The experiment was conducted in Itajubá, MG, Brazil (22° 24’ 46.43” S 45° 26’ 48.94” W), for two years in a completely randomized design with twelve sowing dates and five experimental units per treatment, totaling sixty experimental units. The cardinal temperatures were estimated using twelve methods described in the literature and the values were: base, 10.9 °C, optimum, 17.3 °C and maximum, 51.2 °C. The phyllochron model was superior to Wang and Engel’s model for simulation of vegetative growth of guava, with root... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Psidium guajava L.; Leaf appearance; Degree days. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001100819 |
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| MENDES,DÉBORA S.; PEREIRA,MARLON C.T.; NIETSCHE,SILVIA; SILVA,JOSEILTON F.; ROCHA,JOSIELE S.; MENDES,ATHOS H.; XAVIER,HELISSON R.A.; SANTOS,RAYANE C. DOS. |
| ABSTRACT The phenological growth stages of various species of monocotyledonous and dicotyledonous plants can be uniformly coded using the Biologische Bundesanstalt, Bundessortenamt, und Chemische Industrie (BBCH) scale. The aim of the present study was to determine the duration of different phenological stages and the temperature requirements of the sugar-apple, Annona squamosa, during two crop cycles in the semiarid region of Brazil. Phenological stages were divided into eight of ten possible principal stages: (0) bud development, (1) leaf development, (3) shoot/branch development, (5) inflorescence emergence, (6) flowering, (7) fruit development, (8) fruit maturity and (9) senescence and the beginning of dormancy. The phenological cycle of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: BBCH; Sugar-apple; Degree days; Phenology; Pruning timing. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502293 |
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| 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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| Salaya Domínguez, José Manuel. |
| Se compara el desarrollo de progenies de Pinus patula Schiede ex Schltdl. et Cham.de seis años de edad con diferentes niveles de mejora genética en dos sitios en ambientes contrastantes: Aquixtla, Puebla a 2,930 m (S1) y Acaxochitlán, Hidalgo a 2,260 m (S2). Primero se evaluaron 36 familias mejoradas en Colombia y Sudáfrica (grupo M) y de 36 nativas (grupo Selectas, S). A los 6 años, la supervivencia fue de 72.7% en S1 y 90% en S2. Las progenies del grupo M fueron estadísticamente superiores en el volumen del tronco en S1 (4.3 vs. 3.6 dm3), mientras que no lo fueron en S2 (10.7 vs. 13.5 dm3). En S1, las heredabilidades (h2i) para las características de crecimiento (altura, diámetro y volumen) variaron de 0.09 a 0.12, mientras que en el S2 de 0.26 a 0.35.... |
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Palavras-chave: Pinus patula; Progenies; Familias; Parámetros genéticos; Diagnóstico nutricional; Fenología; Patrón de crecimiento; Grados-día; Forestal; Doctorado; Families; Genetic parameters; Nutritional diagnosis; Phenology; Growth pattern; Degree days. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1810 |
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| Lamarca,Edmir Vicente; Camargo,Marcelo Bento Paes de; Teixeira,Simone de Padua; Silva,Edvaldo Aparecido Amaral da; Faria,Jose Marcio Rocha; Barbedo,Claudio Jose. |
| ABSTRACT Eugenia pyriformis Cambess., known locally as uvaieira, a species of fruit-bearing tree with both pharmacological and gastronomic potential, has seeds which are sensitive to desiccation. The aim of this study was to analyse whether the degree of tolerance to desiccation of uvaieira seeds depends on the stage of maturation of the seeds at shedding. This, in turn, depends on the environmental conditions in which the seeds develop, including the accumulation of degree-days and rainfall in the period. Seeds were collected from the ripe fruit of parent plants located in the states of São Paulo and Minas Gerais, Brazil, submitted to drying and analysed for water content and germination. A completely randomised design was used in a 20 x 3 factorial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Myrtaceae; Uvaieira; Degree days; Physiological quality; Drying. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000100118 |
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