Ústav výzkumu globální změny

Nejnovější přírůstky:
2023-01-29
22:31
Atmospheric CO2 concentration, light intensity and nitrogen nutrition affect spring barley response to drought and heat stress
Findurová, Hana ; Veselá, Barbora ; Opoku, Emmanuel ; Klem, Karel
The aim of this study was to compare physiological responses of two spring barley varieties,\ndiffering in their oxidative stress tolerance, to drought and heat stress after pre-treatment under different\nirradiation regimes, CO2 concentrations, and nitrogen fertilisation levels. High light intensity, elevated\nCO2, and additional UV radiation increased flavonoid accumulation. Moreover, more flavonoids were\ninduced in oxidative stress-sensitive variety Barke. Combined drought and heat stress caused a large\ndecline in CO2 assimilation, whereas heat stress alone caused only minor changes. Under combined\nstress, plants grown under low light intensity and no UV irradiation performed the best despite their\nhigher initial water use efficiency and lower flavonoids content.

Úplný záznam
2023-01-08
22:31
Letecká hyperspektrální kampaň OA2203_CZU_Otnice je zaměřena na pořízení dat pro účely monitoringu lučních horských ekosystémů.
Fabiánek, Tomáš ; Slezák, Lukáš ; Hanuš, Jan
Letecká hyperspektrální kampaň OA2203_CZU_Otnice je zaměřena na pořízení dat pro účely monitoringu lučních horských ekosystémů.

Úplný záznam
2023-01-08
22:31
Souhrnná výzkumná zpráva OA2203_CZU_Otnice
Hanuš, Jan ; Slezák, Lukáš ; Fajmon, Lukáš
Letecká hyperspektrální kampaň OA2203_CZU_Otnice je zaměřena na pořízení dat pro účely hodnocení obsahu organického uhlíku v půdách.

Úplný záznam
2023-01-08
22:31
Letecká hyperspektrální kampaň CENIA_2204 je zaměřena na pořízení dat pro účely monitoringu skládky Lány.
Hanuš, Jan ; Slezák, Lukáš ; Fajmon, Lukáš
Letecká hyperspektrální kampaň CENIA_2204 je zaměřena na pořízení dat pro účely monitoringu skládky Lány.

Úplný záznam
2023-01-08
22:31
Souhrnná výzkumná zpráva OA2211_UK_KutnaHora
Hanuš, Jan ; Slezák, Lukáš ; Fajmon, Lukáš
Letecká hyperspektrální kampaň OA2203_CZU_Otnice je zaměřena na pořízení dat pro účely mapování opuštěné půdy.

Úplný záznam
2023-01-08
22:31
Souhrnná výzkumná zpráva OA2207_JCU_Orlík
Hanuš, Jan ; Slezák, Lukáš
Letecká hyperspektrální kampaň OA2207_JCU_Orlík je zaměřena na pořízení dat pro účely hodnocení kvality povrchových vod.

Úplný záznam
2022-10-23
00:01
The impact of covid-19 restrictions on carbonaceous aerosols at rural background site: importance of vertical distribution
Mbengue, Saliou ; Vodička, Petr ; Komínková, Kateřina ; Schwarz, Jaroslav ; Zíková, Naděžda ; Prokeš, Roman ; Suchánková, Lenka ; Julaha, Kajal ; Ondráček, Jakub ; Holoubek, Ivan ; Ždímal, Vladimír
In this study, EC and OC at 4 m elevation and EC at 230 m elevation showed a similar \nseasonal pattern with higher values in winter and lower values in summer. OC, measured \nat 230 m height showed an opposite behavior with slightly higher values in spring and \nsummer, probably related to the increased contribution of secondary organic carbon \n(SOC). Concentrations were generally higher at 4 m, where there was also a better \ncorrelation between EC and OC, suggesting a greater influence of local sources near the \nsurface.

Úplný záznam
2022-10-09
00:00
Modelling the onset of phenological phases of spring barley (Hordeum vulgare L.)
Dížková, Petra ; Bartošová, Lenka ; Hájková, L. ; Balek, Jan ; Bláhová, Monika ; Bohuslav, Jakub ; Pohanková, Eva ; Trnka, Miroslav ; Žalud, Zdeněk
The onset of phenological phases of plant species is influenced mainly by air temperature. Each phenophase has its temperature limits (base temperature and temperature sum), which must be reached for each phase to occur. With knowledge of these limits, it is possible to predict the onset of phenological phases in localities where only meteorological data are available and also in future climate conditions. In this work, we used phenological ground-based data from 33 stations within the Czech Republic to calculate the most relevant meteorological predictors. PhenoClim software was used for phenological and meteorological data calibration and modelling. The smallest error that allows us to predict the term of the phenophases was found for the heading of spring barley (Hordeum vulgare L.), as the best predictor was the maximum daily temperature and the statistical error was 3.6 days.

Úplný záznam
2022-10-09
00:00
Quo Vaditis Agriculture, Forestry and Society under Global Change? From understanding past and present Earth´s processes to adaptations for the future
Šprtová, Miroslava ; Bartošová, Lenka ; Acosta, Manuel ; Klem, Karel ; Leventon, Julia ; Červený, Jan
International conference „Quo vaditis agriculture, forestry and society under Global Change? From understanding past and present Earth’s processes to adaptations for the future“, whose scientific sponsor is the European Center of Excellence CzechGlobe, should prove that science has an irreplaceable role in addressing mitigation and adaptation to climate change, in meeting international commitments to climate change and tasks of the EU Strategy on adaptation to climate change.

Úplný záznam
2022-10-09
00:00
Yield formation parameters of winter wheat under two CO2 levels in water sufficient and depleted environment
Hlaváčová, Marcela ; Klem, Karel ; Veselá, Barbora ; Findurová, Hana ; Hlavinka, Petr ; Smutná, P. ; Horáková, V. ; Škarpa, P. ; Trnka, Miroslav
Agricultural production faces with ongoing climate that in Europe takes form of changing seasonal precipitation pattern with more frequent drought spells. These changes come on top of rising air temperature and did and will affect productivity as well as onset and duration of key developmental stages for yield formation of major staple crops such as wheat. In order to ensure stable agricultural production and satisfy demand of the increasing humanpopulation, it is crucial to know responses of major field crops to these abiotic stress factors to assess suitability of genotypes to specific environmental conditions. The aim of this study was to evaluate final yield formation parameters of five winter wheat genotypes cultivated in pots and exposed to two different levels of CO2 concentrations (400 ppm as ambient and 700 ppm as elevated CO2 concentrations) and two water treatments (well- watered control and drought-stressed plants). Theexperimental treatments were set up in growth chambers from the end of heading stage (BBCH 59)to the beginning of ripening stage (BBCH 71) to simulate the conditions under future climate. The results showed that elevated CO2 concentration led to: (1) mitigation of reduction in final yield formation parameters of drought-stressed plants compared to those of control, (2) enhanced results of drought-stressed treatments compared to those of drought-stressed treatments exposed to the ambient CO2 concentration. Pannonia NS was found out as the less responsive genotype to the exposition of CO2 concentration (no statistically significant differences among ambient and elevated CO2 concentrations in all yield formation parameters were identified). On contrary, harvest index of genotype Bohemia was identified as the most sensitive parameter in response to drought stress as well as to the atmospheric CO2 concentration.

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