Comparison of leaf area index dynamics and radiation use efficiency of C3 crops in the Czech Republic

0485203 - ÚVGZ 2019 RIV CZ eng C - Conference Paper (international conference)
Tripathi, Abishek - Pohanková, Eva - Trnka, Miroslav - Klem, Karel
Comparison of leaf area index dynamics and radiation use efficiency of C3 crops in the Czech Republic.
Quo vaditis agriculture, forestry and society under global change? Conference proceeding. Brno: Global change research institute, 2017 - (Urban, O.; Šprtová, M.; Klem, K.), s. 29-34. ISBN 978-80-87902-22-6.
[Quo vaditis agriculture, forestry and society under Global Change? Velké Karlovice (CZ), 02.10.2017-04.10.2017]
R&D Projects: GA MŠMT(CZ) LM2015061
Institutional support: RVO:86652079
Keywords : leaf area * index dynamics * radiations use efficiency * Czech Republic
OECD category: Meteorology and atmospheric sciences

Leaf area index (LAI) and radiation use efficiency (RUE) are key parameters for plant growth and productivity.
Because of irregularities in weather conditions, accurate estimation of crop production requires
understanding relationships between weather, LAI, RUE, and final production. It is thus important to
study how the LAI dynamics, leaf area duration (LAD), and RUE are related to aboveground biomass production
for different crops. In our study, we compared aboveground dry mass production, LAI dynamics,
RUE, and LAD in three C3 crops (spring barley [SB], winter wheat [WW], and oilseed rape [OSR]) in the
Czech Republic. LAI was measured on the basis of transmitted photosynthetically active radiation, LAD
was calculated by counting the number of days in the growing season, RUE was measured using Beer’s
law, and the aboveground dry mass was estimated at the time of harvest. Results of our study showed high
biomass production and RUE in SB while there was highest maximum LAI (LAImax) and LAD in OSR. We
concluded that LAI dynamics or LAImax do not fully reflect the crop production and that RUE may be considered
as a better indicator for aboveground dry mass production.
Permanent Link: http://hdl.handle.net/11104/0280275