TITLE:
The Phenological Stages of Apple Tree in the North Eastern of Iran
AUTHORS:
Mokhtar Karami, Mehdi Asadi
KEYWORDS:
Phenological Stages, GDD, Hierarchical Analysis, Trend Analysis
JOURNAL NAME:
Computational Water, Energy, and Environmental Engineering,
Vol.6 No.3,
July
21,
2017
ABSTRACT: The main objective of this study was to evaluate the process of parameters
such as mean temperature; total precipitation on phenology and phenological
stages of apple golden type in Razavi Khorasan. For this reason, long-term
data of absolute minimum daily temperature, precipitation, humidity, as well
as Digital Elevation Model (DEM) was used. After collecting data on phenology
and Growing Degree Days (GDD) for golden apple, to pass each phenological
stage at different growth stages, the start and end dates, phenological
stages of the locations were identified. Then, regression equations with variable
longitude, latitude and altitude on SPSS software at level of 50% and 95%,
respectively were used, and finally phenological stages and spatial distribution
maps of temperature and precipitation variables based on these equations
were drawn in ARC GIS software. The analysis of the phenological stages
showed that Torbate Heydarieh station has a decreasing trend which is significant
at 1% in all stages of phenology and Ghoochan station does not show
any significant increase or decrease trend at all stages of phenology.