At 5 days and 10 days after rewatering, the aboveground andtotal biomass in DT were significantly lower than those in WT(Fig. 1). However, no significant difference was found for the above-ground biomass and total biomass between DN and WN at 10 daysafter rewatering. Therefore, compared with no addition of NO3−toroots, addition of NO3−to roots quickly stimulated corn seedlinggrowth after rewatering. The rapid growth of post-drought rewa-tering in corn seedlings induced compensatory growth under theaddition of NO3−to roots. The root–shoot ratio was significantlyhigher in DT and DN than that in WT and WN before rewatering, butno significant difference was observed between these treatmentgroups at 5 days and 10 days after rewatering (Fig. 1). Therefore,drought stress induced the occurrence of relatively large roots incorn seedlings, but rewatering decreased their root size.