Figure 3
The effects of foliar Si spraying on the SPAD values of rice leaves. Cd1, Cd2, Cd3: Three Cd concentration stress treatments (Cd1: 0.20 mg·kg−1, Cd2: 0.60 mg·kg−1, and Cd3: 1.60 mg·kg−1). CK, Si: two spraying treatments (CK: no spraying of any material, Si: foliar Si spraying). Data present the mean ± standard deviation of six replicates. Capital letters indicate significant differences (p < 0.05) between CK and Si treatments at the same Cd concentration. Lowercase letters indicate significant differences (p < 0.05) between CK or Si treatments at different Cd concentrations.
