As shown in Fig. 1, in Exp-1, the aboveground biomass, rootbiomass and total biomass were significantly higher in WT andWN than those in DT and DN during the drought stress period,which indicated that drought stress inhibited corn growth. Afterrewatering, the aboveground and total biomass in WN increasedcompared with those in WT. At 10 days after rewatering, they weresignificantly higher in WN than in WT. At 5 days and 10 days afterrewatering, the aboveground and total biomass in DN were signifi-cantly higher than those in DT. These results indicated that additionof NO3−to roots quickly stimulated corn seedling growth eitherunder wetness or rewatering.