Figure 2. Growth of sunflower for early (blue) and normal (red) sowing
dates under field conditions using manual and high-throughput UAV
phenotyping. Means (points) ± 1 standard deviation (SD) (error bars) of
the (A) vigor, (B) canopy cover and (C) height of XRQ plants. Vertical
dashed lines indicate sowing dates. (D) Means ± 1 SD of growth rates of
plant emergence and time to reach fully expanded leaf 1, (E) mean canopy
cover growth rate and (F) mean height growth rate. Asterisks indicate
the significance of the Student’s t-test between the cold and control
treatments using the emmeans R function: ***: p < 0.001, **: p
< 0.01, *: p < 0.05, NS: non-significant.
Corresponding experimentations are 21TE01-02 and
22EX01-02. |