Fig. 2

Variations in Rh/Rs and Ra/Rs under different drought stresses in the growing season (Mean ± SE) (Note: W1: natural rainfall (control); W2: rain reduction by 30%; W3: rain reduction by 50%).
Variations in Rh/Rs and Ra/Rs under different drought stresses in the growing season (Mean ± SE) (Note: W1: natural rainfall (control); W2: rain reduction by 30%; W3: rain reduction by 50%).