episodes
For both Exp. 1 in field and Exp. 2 in laboratory, grain weight at physiology maturity in DS, HS and DHS treatments was all decreased significantly compared with CK (Figure 4b, c). Furthermore, the decreased grain weight by the early stresses was observed in both superior and inferior grains. For Exp. 1, the decreased rate of grain weight among treatments was in the order of HS<DS≤DHS for superior grain and DS≤HS<DHS for inferior grain. Grain weight of superior grain was decreased by 7% in DS treatment, 5% in HS treatment and 8% in DHS treatment. For inferior grain, it was decreased by 6% in both DS and HS treatments and 11% in DHS treatment. For Exp. 2, the decreased rate of grain weight among treatments was in the order of DS≤HS≤DHS for superior grain and HS<DS≤DHS for inferior grain. Compared with CK, grain weight of superior grain in DS, HS and DHS treatment was substantially decreased by 34%, 35% and 38%, respectively. Grain weight of inferior grain was decreased by 31% in DS treatment, 18% in HS treatment and 32% in DHS treatment.