BECAS
KETTLER BelÉn Araceli
congresos y reuniones científicas
Título:
Leaf photosynthesis and NDVI during maize reproductive stages: relationships with grain yield under two contrasting growing seasons
Autor/es:
BELÉN KETTLER; FEDERICO NALLI; YAEL NAMTZ; LAURA ECHARTE; NICOLÁS NEIFF
Lugar:
Santa Fe
Reunión:
Congreso; XXXIII Argentinian Meeting of Plant Physiology; 2021
Institución organizadora:
Sociedad Argentina de Fisiología Vegetal
Resumen:
This study aimed to identify the association among leaf photosynthesis (Amax), normalized difference vegetation index (NDVI) and grain yield (GY) in four maize hybrids growing in two contrasting seasons. Experiment was conducted at Corrientes (27°28?45??S; 58°47?06??W) with adequate water and nutrient conditions in a split-plot design with three replications during 2019-2020. Main plots consisted in two growing seasons (GS): early or late (EGS and LGS, respectively). Four hybrids with different genetic background formed the subplots. GY was estimated by manual harvest (4 m-2). Amax was measured in ear leaves ca. once a week from R1 to R4. NDVI was obtained from a multispectral camera mounted on an unmanned aerial vehicle. Amax and NDVI data were averaged across moments. Photo-thermal conditions (i.e., Q) during reproductive stages were modified between GS (0.46 and 0.34 MJ °Cd-1 for EGS and LGS, respectively). Delayed sowing date significantly (p
