Blooming under Mediterranean Climate: Estimating Cultivar-Specific Chill and Heat Requirements of Almond and Apple Trees Using a Statistical Approach
Ver/Abrir
Autor/a
Díez-Palet, Isabel
Vargas, Francisco
Fecha de publicación
2019-11-15ISSN
2073-4395
Resumen
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.
Tipo de documento
Artículo
Versión del documento
Versión publicada
Lengua
English
Materias (CDU)
633 - Cultivos y producciones
Páginas
21
Publicado por
MDPI
Publicado en
Agronomy
Citación
Díez-Palet, Isabel, Inmaculada Funes, Robert Savé, Carmen Biel, Felicidad de Herralde, Xavier Miarnau, Francisco Vargas, Glòria Àvila, Joaquim Carbó, and Xavier Aranda. 2019. "Blooming Under Mediterranean Climate: Estimating Cultivar-Specific Chill And Heat Requirements Of Almond And Apple Trees Using A Statistical Approach". Agronomy 9 (11): 760. doi:10.3390/agronomy9110760.
Número del acuerdo de la subvención
EC/LIFE/LIFE12 ENV-ES-000536/EU/Demonstration and validation of innovative methodology for regional climate change adaptation in the Mediterranean area/LIFE MEDACC
Program
Fructicultura
Protecció Vegetal Sostenible
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