Meteorological Variables That Affect the Beginning of Flowering of the Winter Oilseed Rape in the Czech Republic

Winter oilseed rape (<i>Brassica napus</i>) is one of the most cultivated oilseeds in the Czech Republic and belongs among major pollen allergens. Pollen allergies have an extensive clinical impact worldwide, and as well as in the Czech Republic. In this paper, meteorological variables s...

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Autores principales:	Lenka Hájková, Martin Možný, Veronika Oušková, Lenka Bartošová, Petra Dížková, Zdeněk Žalud
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	<i>Brassica napus</i> air temperature PhenoClim model BBCH60 beginning of flowering Meteorology. Climatology QC851-999
Acceso en línea:	https://doaj.org/article/03e8a4cca1cd4c6b89fe8a5f9de63e5f
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spelling	oai:doaj.org-article:03e8a4cca1cd4c6b89fe8a5f9de63e5f2021-11-25T16:44:52ZMeteorological Variables That Affect the Beginning of Flowering of the Winter Oilseed Rape in the Czech Republic10.3390/atmos121114442073-4433https://doaj.org/article/03e8a4cca1cd4c6b89fe8a5f9de63e5f2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4433/12/11/1444https://doaj.org/toc/2073-4433Winter oilseed rape (<i>Brassica napus</i>) is one of the most cultivated oilseeds in the Czech Republic and belongs among major pollen allergens. Pollen allergies have an extensive clinical impact worldwide, and as well as in the Czech Republic. In this paper, meteorological variables such as mean air temperature, maximum and minimum air temperature, precipitation total and number of rainy days in the period 1991–2012 were studied using the PhenoClim phenological model to find the best predictor of the beginning of flowering of the <i>Brassica napus</i> in the Czech Republic. In addition, temporal and spatial evaluations of the beginning of flowering of the <i>Brassica napus</i> were examined at individual stations in different climatic zones within the same period. In total, three phenological stations at altitudes from 270 m asl to 533 m asl located in warm (W2), medium warm (MW7) or cold (C7) climatic zones were used for detailed evaluation. Based on the observation results at selected stations, the beginning of flowering of the <i>Brassica napus</i> advanced progressively in timing (nearly −15 days) in the 1991–2012 period. The base temperature and temperature sums were calculated for the beginning of flowering of the winter oilseed rape using the PhenoClim computer tool. As the most accurate predictor for the beginning of flowering of the <i>Brassica napus</i>, the mean air temperature was determined. The optimal start day for calculation was 30th January, the threshold (base temperature) was 6.0 °C and the temperature sum was 157.0 °C. The RMSE value was 4.77 and the MBE value was −3.00. The simulated data had a good correlation with the real observed data (the correlation coefficients were within the range from 0.56 to 0.76), and the PhenoClim model results indicate using them in the forecast modeling of the beginning of flowering of the <i>Brassica napus</i> in the Czech Republic.Lenka HájkováMartin MožnýVeronika OuškováLenka BartošováPetra DížkováZdeněk ŽaludMDPI AGarticle<i>Brassica napus</i>air temperaturePhenoClim modelBBCH60beginning of floweringMeteorology. ClimatologyQC851-999ENAtmosphere, Vol 12, Iss 1444, p 1444 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	<i>Brassica napus</i> air temperature PhenoClim model BBCH60 beginning of flowering Meteorology. Climatology QC851-999
spellingShingle	<i>Brassica napus</i> air temperature PhenoClim model BBCH60 beginning of flowering Meteorology. Climatology QC851-999 Lenka Hájková Martin Možný Veronika Oušková Lenka Bartošová Petra Dížková Zdeněk Žalud Meteorological Variables That Affect the Beginning of Flowering of the Winter Oilseed Rape in the Czech Republic
description	Winter oilseed rape (<i>Brassica napus</i>) is one of the most cultivated oilseeds in the Czech Republic and belongs among major pollen allergens. Pollen allergies have an extensive clinical impact worldwide, and as well as in the Czech Republic. In this paper, meteorological variables such as mean air temperature, maximum and minimum air temperature, precipitation total and number of rainy days in the period 1991–2012 were studied using the PhenoClim phenological model to find the best predictor of the beginning of flowering of the <i>Brassica napus</i> in the Czech Republic. In addition, temporal and spatial evaluations of the beginning of flowering of the <i>Brassica napus</i> were examined at individual stations in different climatic zones within the same period. In total, three phenological stations at altitudes from 270 m asl to 533 m asl located in warm (W2), medium warm (MW7) or cold (C7) climatic zones were used for detailed evaluation. Based on the observation results at selected stations, the beginning of flowering of the <i>Brassica napus</i> advanced progressively in timing (nearly −15 days) in the 1991–2012 period. The base temperature and temperature sums were calculated for the beginning of flowering of the winter oilseed rape using the PhenoClim computer tool. As the most accurate predictor for the beginning of flowering of the <i>Brassica napus</i>, the mean air temperature was determined. The optimal start day for calculation was 30th January, the threshold (base temperature) was 6.0 °C and the temperature sum was 157.0 °C. The RMSE value was 4.77 and the MBE value was −3.00. The simulated data had a good correlation with the real observed data (the correlation coefficients were within the range from 0.56 to 0.76), and the PhenoClim model results indicate using them in the forecast modeling of the beginning of flowering of the <i>Brassica napus</i> in the Czech Republic.
format	article
author	Lenka Hájková Martin Možný Veronika Oušková Lenka Bartošová Petra Dížková Zdeněk Žalud
author_facet	Lenka Hájková Martin Možný Veronika Oušková Lenka Bartošová Petra Dížková Zdeněk Žalud
author_sort	Lenka Hájková
title	Meteorological Variables That Affect the Beginning of Flowering of the Winter Oilseed Rape in the Czech Republic
title_short	Meteorological Variables That Affect the Beginning of Flowering of the Winter Oilseed Rape in the Czech Republic
title_full	Meteorological Variables That Affect the Beginning of Flowering of the Winter Oilseed Rape in the Czech Republic
title_fullStr	Meteorological Variables That Affect the Beginning of Flowering of the Winter Oilseed Rape in the Czech Republic
title_full_unstemmed	Meteorological Variables That Affect the Beginning of Flowering of the Winter Oilseed Rape in the Czech Republic
title_sort	meteorological variables that affect the beginning of flowering of the winter oilseed rape in the czech republic
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/03e8a4cca1cd4c6b89fe8a5f9de63e5f
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Meteorological Variables That Affect the Beginning of Flowering of the Winter Oilseed Rape in the Czech Republic

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