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).