Evaluation of three modelling approaches for almond blooming in Mediterranean climate conditions

Gaeta, Liliana; Losciale, Pasquale

doi:10.1016/j.eja.2018.04.005

Cited by 14 publications

(7 citation statements)

References 63 publications

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“…These results suggest that the main trait defining early to late blooming cultivars in a Mediterranean climate is their CR. In accordance with our results, Gaeta et al [50] obtained higher coefficients of variation on CR than on HR, suggesting that the flowering period is more dependent on CR in warm climates. Egea et al [48] also reported CR as the main factor differentiating early from late blooming cultivars.…”

Section: Chill and Heat Requirements For Almondsupporting

confidence: 93%

“…The same applies to HR: the results obtained for the cultivars 'Ramillete', 'Marcona', 'Rof', 'Nonpareil', 'Texas', 'Cristomorto', 'Masbovera', 'Ferragnes', 'Ferraduel', 'Tuono', 'Primorskiy', 'Rana', 'Tarragonès', and 'Genco' reasonably matched those obtained in the studies of Alonso et al [39], Egea et al [48], Benmoussa et al [23], and Gaeta et al [50]. However, the cultivars that had elevated CR together with low HR (e.g., 'Texas') and vice versa (e.g., 'Cristomorto'), did not follow the same pattern in those studies.…”

Section: Chill and Heat Requirements For Almondsupporting

confidence: 84%

“…We believe that the use of different methods (natural condition-statistical versus forced conditions-experimental) to determine the duration of the chilling phase may be the cause of the difference. The case of 'Tuono' seems to be singular as the results obtained by Benmoussa et al [23] and El Yaacoubi et al [15] are similar and quite different from ours, but Gaeta et al's [50] results in Apulia (Italy) are similar to our estimations, which might be due to the presence of two different local sub-varieties of the cultivar, as Apulia and Catalonia share similar climate conditions. They also found results for 'Cristomorto' and 'Rana' that resulted similar to ours.…”

Section: Chill and Heat Requirements For Almondcontrasting

confidence: 61%

“…CR and HR for almond have previously been estimated in several studies [15,23,[48][49][50][51]. However, the lack of standard methods to calculate these agroclimatic requirements hinders the possibility of an accurate comparison with our results.…”

Section: Chill and Heat Requirements For Almondmentioning

confidence: 90%

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Blooming under Mediterranean Climate: Estimating Cultivar-Specific Chill and Heat Requirements of Almond and Apple Trees Using a Statistical Approach

et al. 2019

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Climate change, and specifically global temperature increase, is expected to alter plant phenology. Temperate deciduous fruit trees have cultivar-specific chill and heat requirements to break dormancy and bloom. In this study, we aimed to estimate chill and heat requirements (in chill portions, CP, and growing degree hours, GDH, respectively) of 25 almond (30–36 years) and 12 apple (14–26 years) cultivars grown under a Mediterranean climate. The set included early and late blooming genotypes. Long-term phenological and temperature records were analyzed by means of partial least squares (PLS) regression. The main difference between early and late genotypes was chill requirement, ranging from 8.40 CP of early genotypes to 55.41 CP of extra-late genotypes. However, as chill requirements are quite easily attained by all almond cultivars in this study, year-to-year variations in actual blooming dates for each genotype are governed by variability of mean forcing temperatures. In contrast, different chill and heat combinations resulted in similar mean blooming dates for the studied apple cultivars. Mean temperature in both chilling and forcing phases determined their blooming time in the location studied. Overlaps and gaps between both phases were obtained. Despite some limitations, the PLS analysis has proven to be a useful tool to define both chilling and forcing phases. Nevertheless, since the delineation of these phases determine the total amount of CP and GDH, further efforts are needed to investigate the transition of these phases.

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Section: Chill and Heat Requirements For Almondsupporting

confidence: 93%

Section: Chill and Heat Requirements For Almondsupporting

confidence: 84%

Section: Chill and Heat Requirements For Almondcontrasting

confidence: 61%

Section: Chill and Heat Requirements For Almondmentioning

confidence: 90%

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Blooming under Mediterranean Climate: Estimating Cultivar-Specific Chill and Heat Requirements of Almond and Apple Trees Using a Statistical Approach

et al. 2019

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“…Benmoussa et al (2017) mencionan que el modelo de PF proporcionó la estimación más precisa de requerimientos de frío en cultivares de almendro, con la menor variación interanual en el frío acumulado durante la endodormancia. En este sentido, Gaeta et al (2018) mencionan un requerimiento en almendro cv. Tuono de 52 PF y 3983 GDH °C en la región de Apulia, Italia.…”

Section: Validación De Los Modelosunclassified

Determinación de los requerimientos térmicos otoño-invernales en almendro (Prunus amygdalus Batsch) cv. Guara y cv. Marinada

Chaar¹,

Castro²

2022

Rev AIA

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Objetivo: Determinar en almendros cv. Guara y cv. Marinada la fecha de transición entre endodormancia y ecodormancia, y los requerimientos de frío y de calor para la salida del reposo otoño-invernal. Materiales y métodos: para determinar la fecha de transición entre endodormancia y ecodormancia, se utilizó un método de correlación entre la fecha de plena floración y períodos de temperatura media del aire. El requerimiento de frío se determinó mediante tres modelos distintos: horas de frío (HF), unidades de frío (UF) y porciones de frío (PF). La acumulación de calor se calculó como horas grado de crecimiento (GDH °C) para los tres modelos de acumulación de frío. Resultados: la fecha media de transición entre endodormancia y ecodormancia fue el 29 de julio para el cv. Guara y el 27 de julio para el cv. Marinada. El modelo de PF estimó la fecha de plena floración un día antes a la observada a campo. El modelo de HF seis días antes y el de UF seis días después. Conclusión: el modelo más adecuado fue el de PF. Los cultivares Guara y Marinada poseen el mismo requerimiento de frío (41 PF) y distinto requerimiento de calor (4626 y 5552 GDH ºC, respectivamente), para florecer.

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Early Warning of Late Spring Frost in Apple Orchards of Northwest of Iran

Ebnehejazi,

Yazdanpanah

2024

Theor Appl Climatol

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Evaluation of three modelling approaches for almond blooming in Mediterranean climate conditions

Cited by 14 publications

References 63 publications

Blooming under Mediterranean Climate: Estimating Cultivar-Specific Chill and Heat Requirements of Almond and Apple Trees Using a Statistical Approach

Blooming under Mediterranean Climate: Estimating Cultivar-Specific Chill and Heat Requirements of Almond and Apple Trees Using a Statistical Approach

Determinación de los requerimientos térmicos otoño-invernales en almendro (Prunus amygdalus Batsch) cv. Guara y cv. Marinada

Early Warning of Late Spring Frost in Apple Orchards of Northwest of Iran

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