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Heat Requirement from Blooming to Maturing in Apricot Cultivars

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Authors
Milatović, Dragan
Ruml, Mirjana
Vulić, Todor
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Abstract
Heat requirement from blooming to maturing in 15 apricot cultivars grown in the Belgrade region was determined by the Growing Degree Days method (GDD), using 8-year-phenological data. Two methods for calculating daily mean air temperatures were evaluated: (1) the mean of the maximum and minimum daily temperature (Max/Min), and (2) the mean of three equally spaced hourly observations weighted with the last observation (Weighted). The least coefficient of variation in GDD method was applied to obtain the best lower and upper threshold temperatures. The obtained the best lower threshold temperature varied from 0 degrees C in cultivar 'Kishiniev Early' to 7 degrees C in cultivar 'Roxana'. Calculations of daily mean air temperatures by Weighted method resulted in a smaller coefficient of variation than Max/Min method. Introduction of the upper threshold led to an increase of the coefficient of variation in GDD. The number of days from full blossoming to maturing ranged from 82 to 112. Takin...g 3 degrees C as the base temperature (the mean value of all cultivars studied), the accumulated GDD between these two phenological stages varied from 1056 (in 'Senetate') to 1648 (in 'Kecskemet Rose').

Keywords:
Prunus armeniaca / growing degree days / threshold temperature / phenology / daily mean air temperature
Source:
Acta Horticulturae, 2010, 862, 245-250

ISSN: 0567-7572

WoS: 000313516500038

Scopus: 2-s2.0-77957317118
[ Google Scholar ]
1
1
Handle
https://hdl.handle.net/21.15107/rcub_agrospace_2147
URI
http://aspace.agrif.bg.ac.rs/handle/123456789/2147
Collections
  • Radovi istraživača / Researchers’ publications
Institution/Community
Poljoprivredni fakultet
TY  - CONF
AU  - Milatović, Dragan
AU  - Ruml, Mirjana
AU  - Vulić, Todor
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2147
AB  - Heat requirement from blooming to maturing in 15 apricot cultivars grown in the Belgrade region was determined by the Growing Degree Days method (GDD), using 8-year-phenological data. Two methods for calculating daily mean air temperatures were evaluated: (1) the mean of the maximum and minimum daily temperature (Max/Min), and (2) the mean of three equally spaced hourly observations weighted with the last observation (Weighted). The least coefficient of variation in GDD method was applied to obtain the best lower and upper threshold temperatures. The obtained the best lower threshold temperature varied from 0 degrees C in cultivar 'Kishiniev Early' to 7 degrees C in cultivar 'Roxana'. Calculations of daily mean air temperatures by Weighted method resulted in a smaller coefficient of variation than Max/Min method. Introduction of the upper threshold led to an increase of the coefficient of variation in GDD. The number of days from full blossoming to maturing ranged from 82 to 112. Taking 3 degrees C as the base temperature (the mean value of all cultivars studied), the accumulated GDD between these two phenological stages varied from 1056 (in 'Senetate') to 1648 (in 'Kecskemet Rose').
C3  - Acta Horticulturae
T1  - Heat Requirement from Blooming to Maturing in Apricot Cultivars
EP  - 250
SP  - 245
VL  - 862
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2147
ER  - 
@conference{
author = "Milatović, Dragan and Ruml, Mirjana and Vulić, Todor",
year = "2010",
abstract = "Heat requirement from blooming to maturing in 15 apricot cultivars grown in the Belgrade region was determined by the Growing Degree Days method (GDD), using 8-year-phenological data. Two methods for calculating daily mean air temperatures were evaluated: (1) the mean of the maximum and minimum daily temperature (Max/Min), and (2) the mean of three equally spaced hourly observations weighted with the last observation (Weighted). The least coefficient of variation in GDD method was applied to obtain the best lower and upper threshold temperatures. The obtained the best lower threshold temperature varied from 0 degrees C in cultivar 'Kishiniev Early' to 7 degrees C in cultivar 'Roxana'. Calculations of daily mean air temperatures by Weighted method resulted in a smaller coefficient of variation than Max/Min method. Introduction of the upper threshold led to an increase of the coefficient of variation in GDD. The number of days from full blossoming to maturing ranged from 82 to 112. Taking 3 degrees C as the base temperature (the mean value of all cultivars studied), the accumulated GDD between these two phenological stages varied from 1056 (in 'Senetate') to 1648 (in 'Kecskemet Rose').",
journal = "Acta Horticulturae",
title = "Heat Requirement from Blooming to Maturing in Apricot Cultivars",
pages = "250-245",
volume = "862",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2147"
}
Milatović, D., Ruml, M.,& Vulić, T.. (2010). Heat Requirement from Blooming to Maturing in Apricot Cultivars. in Acta Horticulturae, 862, 245-250.
https://hdl.handle.net/21.15107/rcub_agrospace_2147
Milatović D, Ruml M, Vulić T. Heat Requirement from Blooming to Maturing in Apricot Cultivars. in Acta Horticulturae. 2010;862:245-250.
https://hdl.handle.net/21.15107/rcub_agrospace_2147 .
Milatović, Dragan, Ruml, Mirjana, Vulić, Todor, "Heat Requirement from Blooming to Maturing in Apricot Cultivars" in Acta Horticulturae, 862 (2010):245-250,
https://hdl.handle.net/21.15107/rcub_agrospace_2147 .

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