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

0549326 - ÚVGZ 2022 RIV CH eng J - Journal Article
Hájková, L. - Možný, M. - Oušková, V. - Bartošová, Lenka - Dížková, Petra - Žalud, Zdeněk
Meteorological Variables That Affect the Beginning of Flowering of the Winter Oilseed Rape in the Czech Republic.
Atmosphere. Roč. 12, č. 11 (2021), č. článku 1444. E-ISSN 2073-4433
R&D Projects: GA MŠMT(CZ) EF16_019/0000797; GA MZe(CZ) QK1910338
Research Infrastructure: CzeCOS III - 90123
Institutional support: RVO:86652079
Keywords : brassica-napus l. * climate-change * allergenic pollen * germination * phenology * yield * plant * phenophases * temperature * trends * Brassica napus * air temperature * PhenoClim model * bbch60 * beginning of flowering
OECD category: Meteorology and atmospheric sciences
Impact factor: 3.110, year: 2021
Method of publishing: Open access
https://click.endnote.com/viewer?doi=10.3390%2Fatmos12111444&token=WzI5NjkzMTIsIjEwLjMzOTAvYXRtb3MxMjExMTQ0NCJd.htmL74u0vjDXEKjzwaxLvSCWzEc

Winter oilseed rape (Brassica napus) 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 Brassica napus in the Czech Republic. In addition, temporal and spatial evaluations of the beginning of flowering of the Brassica napus 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 Brassica napus advanced progressively in timing (nearly15 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 Brassica napus, the mean air temperature was determined. The optimal start day for calculation was 30th January, the threshold (base temperature) was 6.0 & DEG,C and the temperature sum was 157.0 & DEG,C. The RMSE value was 4.77 and the MBE value was3.00. 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 Brassica napus in the Czech Republic.
Permanent Link: http://hdl.handle.net/11104/0325343