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.