3.3 Total above-ground biomass
Franklin had the greatest capacity to recover from WL1; relative to
control biomass of Franklin after waterlogging was 56% (Fig. 5a) but
relative to control biomass at harvest was 79% (Fig. 5b). Westminster
had the greatest capacity to recover from WL2; relative to control
biomass of Westminster after waterlogging was 29% (Fig. 5a) and
relative to control biomass at harvest was 78%. Macquarie+ had the
greatest capacity to recover from WL3; There was no significant effect
on above-ground biomass excluding grains of WL4. At harvest, apart from
Macquarie+, W3 showed much great effect on the biomass with all plant
Franklin failing to survive.
Across genotypes, the average biomass reduction at maturity for WL1,
WL2, WL3 and WL4 was 28%, 41%, 52% and 55% respectively (Fig. S1).
Generally, the greatest biomass reduction at maturity caused by
waterlogging was in treatment WL4, with biomass reductions ranging from
50 to 68%. The main effect of waterlogging on above-ground biomass was
on dry
spike
weight and to a lesser extent dry stem and leaf weight, particularly
WL4. Franklin did not recover from WL3 (WL4 was not conducted on
Franklin and Westminster).